#linuxcnc | Logs for 2013-06-30

[00:11:34] <Aero-Tec2> is there a threading tool for G76?
[00:13:08] <Aero-Tec2> a program that you enter in some data and it outputs thread depth and offsets and such
[00:40:38] <Aero-Tec2> there seams to be a error in the G76 example
[00:40:56] <Aero-Tec2> g0z.2x.2
[00:41:37] <Aero-Tec2> that would make the drive line inside the 1/4 x 20 thread
[00:43:19] <Aero-Tec2> should it not be g0 z.2 x0.27 or x0.26 or even x0.255?
[00:44:13] <Aero-Tec2> thought the drive line is larger for external threads and smaller for internal threads
[00:48:43] <Aero-Tec2> is not the drive line the safe Z for G0 moves the Z axis?
[00:49:06] <Aero-Tec2> still talking G76
[00:51:25] <Aero-Tec2> sorry, I should not work late
[00:51:58] <Aero-Tec2> and think more before typing
[00:52:12] <Aero-Tec2> radius mode
[00:53:55] <Aero-Tec2> lack of coffee and late nights are a dynamite combo for making dumb brainless posts
[00:54:38] <Aero-Tec2> again sorry for the dumb posting
[01:57:10] <DJ9DJ> moin
[04:49:19] <RyanS> Not too far from me :p http://www.ebay.com.au/itm/Cincinnati-Horizontal-Milling-Machine-/231006714493?pt=LH_DefaultDomain_15&hash=item35c912ba7d
[04:57:06] <RyanS> http://www.ebay.com.au/itm/Variable-Speed-Universal-Vertical-Milling-Drilling-Machine-/300926437113?pt=LH_DefaultDomain_15&hash=item46109d06f9
[05:38:06] <JesusAlos> hello
[05:39:04] <JesusAlos> looking for a plt cnc interface without external power supply
[05:39:52] <JesusAlos> parallel port interface for supply with 230V
[05:40:01] <JesusAlos> and cooling relay control
[06:29:31] <jthornton> what is a plt?
[06:30:29] <Loetmichel> jthornton: if they mean *.plt: a hpgl-plot-file
[06:32:01] <jthornton> I see, thanks for the explanation
[06:32:41] <jthornton> as usually I failed to see if he stayed on the channel more than a minute after asking the question
[06:33:15] <archivist> 25-45 a whole 20 minutes
[06:33:25] <jthornton> yea
[06:33:53] <archivist> but as often the english is difficult to understand
[06:43:50] <Loetmichel> if he was still here i would suggest a PC with PCNC-Dos and sime cheap TB6560 powered from the PCs 12V supply ;-)
[06:44:04] <Loetmichel> -i+o
[09:57:23] <EDocToor> Hello peeps; I just notice your channel and thought that I would ask a dumb question: Does the linuxcnc use G code?
[09:58:40] <ReadError> of course
[10:14:04] <EDocToor> Thanks, I only ask because I seen a Youtube tutorial that used scripts, so I guess it is way more powerful than one would expect.. I will give it a try when I get my CNC built.. At this time I would like to introduce another CNC channel #DIYCNC which is exactly what you would expect. Thanks for your time.
[10:53:39] <JT-Shop> http://imagebin.org/262994
[10:53:49] * JT-Shop wonders what a peeps is?
[10:56:16] <archivist> plural persons
[10:57:34] <archivist> but how can people from other places claim knowledge of diycnc and not know linuxcnc does gcode :)
[10:58:08] <JT-Shop> my thoughts exactly as well as how did you stumble across this channel
[10:58:19] <Jymmm> JT-Shop: http://www.marshmallowpeeps.com/
[10:58:52] <archivist> JT-Shop, er...no stepper/servo fitted yet!
[10:58:52] <JT-Shop> lol
[10:59:32] <JT-Shop> just got it out of the box a minute ago
[10:59:57] <archivist> plenty of time!
[11:00:18] <archivist> you showed the box yesterday!
[11:01:14] <archivist> cannot use vertically the oil will fall out that oiler
[11:01:41] <JT-Shop> just got back from town with the wife and now it is nap time :)
[11:01:50] <JT-Shop> and I'm reading the manual!
[11:04:29] <JT-Shop> it has a ring to adjust the gear lash as well it will disengage the gear for free turning
[11:05:17] <archivist> an eccentric mount to the worm, seems common
[11:43:52] <Tom_itx> now i must find another spindle sensor. the wheel vibrated loose and took it out
[11:47:45] <gene78> Grrrr, linuxcnc.var is eating my lunch, offsets stored in it from touch-offs are screwing with my homing
[11:48:21] <gene78> But I can delete the file, that fine, but I cannot comment it out of the ini, its a showstopper
[11:49:06] <gene78> current 2.5.2 release
[11:50:06] <gene78> Is there a workaround?
[11:51:14] <archivist> I usually look in the mirror when I get an offset problem
[11:51:44] <gene78> Chuckle, I am
[11:53:37] <gene78> But how can I use a touch-off, with it screwing with my home positions on the next restart when the transmission vector is thiis file??
[11:58:14] <archivist> one thinks, is it working as documented, am I using it in the right way
[11:59:18] <archivist> I would be homing and touching off on each run, not expecting stuff to be carried over
[12:00:41] <archivist> when I saw a message the other day about two setups with differing offsets....I thought trouble....
[12:10:22] <IchGuckLive> hi all B)
[12:11:27] <IchGuckLive> someone inside the super hot USA Westzone 50deg C +
[12:16:50] <ssi> here I am! it's time for control wiring!
[12:16:51] <ssi> :D
[12:17:28] <IchGuckLive> ssi: they may control you
[12:17:50] <IchGuckLive> and dont forget the NSA wire to connect
[12:20:11] <archivist> I bet the nsa has keyword logging probably on nsa too as well as...
[12:21:13] <IchGuckLive> it stands for notSutableAplication not what you think ;-)
[12:22:00] <IchGuckLive> thats why the hole world is locked konfusion on EMC as it stands for so many things
[12:27:52] <EDocToor> I see that there is a new stable release... Congrats!!! May I ask, why doesn't it run on current Ubuntu?
[12:29:36] <IchGuckLive> no Realtime support
[12:30:02] <IchGuckLive> EDocToor: as well as there are most aplicatins still back to 10.04
[12:30:51] <IchGuckLive> EDocToor: there is a 3.5.7 relese that may take your interest its only for mashining nothing else
[12:31:46] <IchGuckLive> EDocToor: may i usk whee are yoiu from US or Europ ...
[12:32:08] <IchGuckLive> im in Germany
[12:33:01] <EDocToor> Canada, Building my first CNC from scratch it has a 36 x 36 inch cutting area.
[12:33:12] <EDocToor> Hi IchGuckLive
[12:33:52] <IchGuckLive> nice there are othe canadians here
[12:34:08] <IchGuckLive> EDocToor: Stepper or more like servo
[12:34:15] <EDocToor> I am forced to used MACH3 and every year I come and ask the same question as I cannot/don't want too dual boot
[12:34:32] <ssi> friends don't let friends use mach3
[12:34:37] <ssi> or random strangers on the internets
[12:34:46] <EDocToor> ssi LOL
[12:35:00] <ssi> I started with mach3 too
[12:35:03] <ssi> cause it was low resistance
[12:35:17] <ssi> but praise linuxcnc, I have SEEN the light
[12:35:31] <DJ9DJ> hellowed is linuxcnc!
[12:35:34] <Dave911> Right ... they make them wait for Mach4.. just to be mean! ;-)
[12:35:41] <EDocToor> What can I do, my company uses the Current Ubuntu... for office .. and needs to run stepper motors
[12:35:42] <ssi> hahah
[12:36:19] <IchGuckLive> EDocToor: the mashine does not need the curent ubuntu
[12:36:42] <IchGuckLive> it needs a bloodie old PC for 20box
[12:36:51] <EDocToor> My OFFICE counter needs current ubuntu
[12:37:19] <IchGuckLive> but does the office counter nedd Mashine access
[12:37:27] <ssi> Connor: around?
[12:37:53] <IchGuckLive> hi Kenneth_Lerman
[12:37:53] <EDocToor> IchGuckLive, I am not sure.. here is the issue
[12:38:20] <IchGuckLive> most cam run also under the old version
[12:38:21] <Kenneth_Lerman> Greetings.
[12:39:07] <IchGuckLive> EDocToor: is it a mill or plasma laser or ?
[12:40:12] <EDocToor> I have a friend with a Store.. so not my business and I want to get him to go from Windows to Ubuntu so he can use LEMON cash register on KUBUNTU and since the store sells stepper motors need a Current Kubuntu means of controlling stepper motors... any ideas?
[12:40:55] <EDocToor> My CNC at home is mill with a 240 volt water cooled spindle
[12:41:09] <IchGuckLive> LEMON cash register Does shure not need to run on the Mashine itself
[12:42:11] <IchGuckLive> EDocToor: get him a mini itx inside the mill and a Dual Keyboard and Mouse changer
[12:42:41] <IchGuckLive> VGA as well its 15USD anmd done
[12:43:16] <IchGuckLive> double press on ALTGR and you got your 2 systems running
[12:43:50] <IchGuckLive> so your mill is still running the G-code and you cash someone els on the same keyboard
[12:44:52] <IchGuckLive> EDocToor: all your friend need is to know if his PC got ps/2 or USB DVI or VGA
[12:45:25] <IchGuckLive> thats it and a interconnect connects the CAM on Windoof to the NC_folder of the mashine
[12:45:40] <IchGuckLive> done within minutes
[12:46:49] <EDocToor> sorry... but I am too dumb to get what your suggesting.. are you say get two computers and attach them to one monitor and one mouse/keyboard..?
[12:47:21] <IchGuckLive> yes you got it
[12:47:34] <IchGuckLive> as far as 60ft of distance
[12:47:40] <EDocToor> that just won't be acceptable at this store
[12:47:41] <Aero-Tec2> when writing threading Gcode, is there a tool to help with the values to put into the G76 Gcode string?
[12:47:47] <EDocToor> thanks anyway
[12:48:05] <Aero-Tec2> depth of thread and such
[12:48:09] <EDocToor> Aero-Tec2, good question
[12:49:02] <IchGuckLive> Aero-Tec2: its on the wiki at siomple g-code generators
[12:49:11] <ssi> Aero-Tec2: I actually wrote an iphone app to do it
[12:49:14] <ssi> but I never really released it
[12:49:29] <Aero-Tec2> cool
[12:49:35] <ssi> it'll calculate straight infeed and 29.5 degree compound infeed numbers for any arbitrary threa
[12:49:53] <Aero-Tec2> even metric?
[12:50:03] <IchGuckLive> EDocToor: why is it no option to do
[12:50:11] <ssi> no, metric was on my todo list
[12:50:16] <ssi> but it does all UN right now :/
[12:50:36] <ssi> it took me a long time to read over the UN spec and figure it out enough to make it work in all cases
[12:50:44] <ssi> threading specs are surprisingly complicated
[12:50:58] <Aero-Tec2> same with gears
[12:51:01] <ssi> yea
[12:51:23] <EDocToor> IchGuckLive, My boss has windows and mach on one computer.. there is no way that I be able to convince him to go to Kubuntu with two computers.
[12:51:37] <Aero-Tec2> I do lots of custom threads so charts do not cut it for me
[12:51:49] <archivist> I tend to work out the numbers to suit as I works in odd threads/antique
[12:52:42] <archivist> last one was a left hand worm
[12:52:42] <ssi> Aero-Tec2: if you have an iphone I can probably get it built for you
[12:52:48] <IchGuckLive> EDocToor: so stay with mach and machsupport is best for you and get a windows cash system
[12:52:49] <ssi> if not, I dunno how easy it'll be to port to another form
[12:53:02] <Aero-Tec2> would the app at wiki at siomple g-code generators do what you need?
[12:53:14] <ssi> I haven't looked at it
[12:53:30] <ssi> I wrote my app cause I was doing rifle accurizing
[12:53:32] <EDocToor> IchGuckLive, sadly... ;-(
[12:53:49] <ssi> and I needed to be able to take the standard 1-1/6 - 16 receiver thread and cut it to a custom size
[12:53:51] <Aero-Tec2> I work with guns as well
[12:53:55] <ssi> usually 1.072-16
[12:54:20] <ssi> it worked out well
[12:54:35] <ssi> I could plug in my desired thread to the calculator, and it'd give me an OD to turn to, and an infeed depth
[12:54:51] <ssi> and I'd run the threading cycle and my flat diameter was perfect, and my pitch diameter measured over wires was perfect
[12:54:55] <ssi> or within tolerance anyway
[12:55:21] <ssi> I was planning on adding features where it'd do the math for you to tell you what wire size to use and what the diameter over wires should be
[12:57:06] <IchGuckLive> im off as night is falling here !
[12:58:15] <archivist> for specials an app often gets it the way as it mainly does "standard"
[12:58:23] <archivist> it/in
[12:58:26] <ssi> yea
[12:58:32] <ssi> that's why I wrote mine the way I did
[12:58:40] <ssi> you can put in anything, and it calculates it based on the UN formulas
[12:58:46] <archivist> I did a gear one, soon stopped using it
[12:58:47] <ssi> but it has a table that detects standard threads
[12:59:13] <archivist> I then put the smarts in the gcode
[12:59:19] <ssi> I need to dig it out and polish it up
[12:59:21] <ssi> metric would be nice
[12:59:26] <ssi> but I need to digest the metric thread standard
[12:59:50] * Tom_itx gives ssi some pepto
[13:00:02] <ssi> lul
[13:00:43] <archivist> the last gun thread I did was impossibly tight to the shoulder
[13:01:04] <ssi> love that :)
[13:01:13] <JT-Shop> http://imagebin.org/263005
[13:01:33] <archivist> balls
[13:01:44] <JT-Shop> this is off of an old Do All band saw any ideas on how to get the handle off so I can repair the threads?
[13:02:15] <archivist> leave it on :)
[13:02:23] <archivist> use a bigger lathe
[13:02:39] <glowplug> Quick question regarding the BLDC HAL plugin. Is it really possible to drive a brushless motor directly from the parallel port to a 3phase half-bridge?
[13:03:08] <glowplug> I can't seem to find any real life examples of this working. Although the wiki does say that it is possible.
[13:03:17] <EDocToor> JT-Shop, Saw.. then weld back on
[13:03:29] <archivist> or, your just got the right tool JT-Shop do you remember me thread milling
[13:03:31] <ssi> this is what happens when a hobby machinist needs a screw on sunday
[13:03:31] <ssi> https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-ash4/427402_795224676922_1395450746_n.jpg
[13:03:35] <ssi> haha
[13:04:10] <ssi> ah here's what I was looking for
[13:04:11] <ssi> https://fbcdn-sphotos-d-a.akamaihd.net/hphotos-ak-ash4/399878_775108450002_1069079313_n.jpg
[13:04:23] <EDocToor> hee hee
[13:04:28] <ssi> the thread came out chattery and ugly cause I had to do it on that WORN OUT old clausing
[13:04:31] <ssi> but it was tight
[13:04:37] <ssi> https://sphotos-a.xx.fbcdn.net/hphotos-ash4/431028_778516789662_1086450573_n.jpg
[13:05:11] <ssi> that was a blank barrel... shouldered and threaded the tenon and cut the chamber
[13:05:17] <ssi> was a neat project
[13:05:24] <Tom_itx> JT-Shop, you can't hold the handle in a 4 jaw?
[13:05:39] <ssi> muzzle end:
[13:05:39] <ssi> https://sphotos-b.xx.fbcdn.net/hphotos-frc3/401219_780178599382_778457399_n.jpg
[13:05:58] <ssi> I did that one on the grizzly, cnc
[13:06:11] <ssi> https://sphotos-a.xx.fbcdn.net/hphotos-ash4/404679_780071893222_1375393474_n.jpg
[13:06:29] <ssi> https://sphotos-a.xx.fbcdn.net/hphotos-ash4/422975_783007844552_1937769465_n.jpg
[13:06:29] <EDocToor> ssi, is that a 22 shell?
[13:06:33] <ssi> haha no
[13:06:35] <ssi> 30-06
[13:06:40] <ssi> (it's a beefy barrel)
[13:07:01] <JT-Shop> I need to cut off the old threads and bore and thread the part for a fix it stud
[13:07:24] <archivist> JT-Shop, is there a nut on top or a pin through
[13:08:24] <JT-Shop> there is a hole but I don't see a pin
[13:08:44] <JT-Shop> the brown spot near the left upper handle in the photo
[13:08:51] <EDocToor> JT-Shop, One inch in from the handle ... cut the rod... do your work... then weld it back on... grind and it would be as good as new
[13:09:06] <Aero-Tec2> what do you guys think of this website, it looks to have all the info needed and then some for threading
[13:09:08] <archivist> what does the other side of that hole look like (wire brush)
[13:09:08] <Aero-Tec2> http://theoreticalmachinist.com/Threads_UnifiedImperial.aspx
[13:09:09] <JT-Shop> LOL
[13:09:40] <JT-Shop> archivist: there are grind marks let me expose it with the wire brush
[13:09:46] <archivist> EDocToor, handle looks cast not a good idea
[13:09:52] <Aero-Tec2> it does custom threads
[13:10:52] <Aero-Tec2> you can put in your own data for your thread
[13:10:55] <ssi> looks pretty good
[13:10:55] <archivist> Aero-Tec2, all well and good but you need to work out pull in/out and other aspects
[13:11:04] <EDocToor> archivist, not the handle.. the rod
[13:11:33] <ssi> well I'm assuming that "thread depth" is the cross feed depth, and "flank length" would be the compound feed depth
[13:11:35] <archivist> EDocToor, right where he wants an internal thread?.....
[13:12:11] <Aero-Tec2> archivist, pull in/out? you got me there have no idea what your talking about, can you explain more what it is?
[13:12:33] <archivist> Aero-Tec2, the start end tapers
[13:12:40] <JT-Shop> archivist: the hole looks like a casting defect
[13:13:02] <JT-Shop> the shaft is tapered, any chance they just smacked the handle on?
[13:13:16] <Tom_itx> possibly
[13:13:30] <Tom_itx> is it keyed?
[13:13:40] <archivist> JT-Shop, was my thought but is the end riveted
[13:14:07] <JT-Shop> let me brush the end off and see
[13:14:14] <Aero-Tec2> start and end tappers are they not very simple to figure out?
[13:14:40] <archivist> Aero-Tec2, depends on your needs
[13:14:42] <JT-Shop> Tom_itx: I'd have to make a split collar to chuck it in the 4 jaw on the shaft so that is not out of the question at this point
[13:14:44] <EDocToor> archivist, How about Cut as close to the handle as he can .. do the work.. and then TAP the cut end of the work and Drill out the Handle and bolt it back together..
[13:15:59] <archivist> EDocToor, I like JT probably are used to doing things by proper disassembly rather than cutting
[13:16:32] <archivist> working with antiques you have to do it the right way
[13:16:55] <archivist> often easier in the long run too
[13:17:19] <EDocToor> archivist, so how would you get the handle off ... the right way?
[13:17:21] <JT-Shop> archivist: the shaft does not come through the handle
[13:17:29] <EDocToor> Torch?
[13:17:47] <Tom_itx> maybe it was pressed in with a spline or key
[13:17:56] <archivist> JT-Shop, I have seen cast on
[13:18:22] <Tom_itx> something that wasn't gonna vibrate off
[13:18:24] <archivist> but the taper would imply not
[13:18:47] <archivist> wire brush some more looking for the pin
[13:18:52] <Tom_itx> he said the shaft doesn't come thru the handle so how can he see both ends of the taper?
[13:18:53] <EDocToor> archivist, it looks like it was casted on the shaft when casted...
[13:23:00] <tjtr33> hello, where are photos from Wichita posted?
[13:23:27] * JT-Shop goes to attempt Tom_itx idea with the 4 jaw chuck
[13:24:21] <Tom_itx> http://www.wallacecompany.com/mpm-2013/
[13:24:34] <tjtr33> thx tom
[13:26:07] <archivist> and http://www.electronicsam.com/images/KandT/Fest2013/
[13:28:30] <tjtr33> archivist, thx, thats the set from Skunkworks, great
[13:32:03] <JT-Shop> Tom_itx: the 4 jaw won't cut it, can't get on the straight part of the shaft
[13:32:43] <Tom_itx> well that kinda sucks
[13:33:11] <archivist> JT-Shop, time to use two v blocks and an angle plate on the mill
[13:34:16] <JT-Shop> well I took some inspiration from some of the setups I've see archivist do and came up with this http://imagebin.org/263009
[13:34:53] * archivist giggles
[13:36:46] <tjtr33> hmm 2 links to imagebin today show broken image icons
[13:37:27] <tjtr33> they begin to render then show the broken img icon'
[13:37:51] <EDocToor> JT-Shop, So what are you going to do? Inquireing minds want to know...
[13:38:30] <EDocToor> tjtr33, all the links above worked for me...
[13:38:43] <tjtr33> renders now for me too, wheres the taper?
[13:39:02] <JT-Shop> cut the damaged threads off and bore it and tap it for a new stud with a shoulder to fit the new hole in the gear
[13:39:23] <archivist> tjtr33, you can see the taper on http://imagebin.org/263005
[13:40:22] <tjtr33> archivist, thx ( renders now, didnt before)
[13:41:12] <tjtr33> maybe a cross pin near base of one spar
[13:42:04] <JT-Shop> tjtr33: it appears to be a casting void as the hole is not round
[13:42:21] <tjtr33> ah
[13:42:37] <glowplug> Is anyone familiar with using the AVR as a peripheral?
[13:42:56] <glowplug> As in the wiki here: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?action=browse&diff=1&id=AVR
[13:44:35] <ssi> I love when I'm searching for datasheets for something
[13:44:44] <ssi> and the only result that comes up is an irc log from this channel
[13:44:46] <ssi> from me.
[13:44:47] <ssi> :(
[13:45:41] <Tom_itx> glowplug, the xmegas are alot more robust than the other avr8 but are also 3.3v
[13:45:59] <Tom_itx> i haven't used them in practical apps yet though
[13:46:13] <glowplug> There are no examples of it being used in an actual setup?
[13:46:50] <JT-Shop> centered and true to Z check http://imagebin.org/263011
[13:46:52] <Tom_itx> nxp makes a good level translator
[13:47:14] <ssi> JT-Shop: well done
[13:47:21] <ssi> what machine is that?
[13:47:33] <JT-Shop> my BP Series 1
[13:47:42] <ssi> ah
[13:47:44] <glowplug> I'm looking for the absolute cheapest way to run six brushless motors with optical encoder feedback.
[13:47:49] <Tom_itx> nice blast shield JT-Shop
[13:48:00] <glowplug> The wiki suggests this is possible with parallel port directly to 3phase half bridges. But I can't find any examples.
[13:48:05] <ssi> glowplug: looked at mesa's stuff?
[13:48:19] <glowplug> I'm trying to get cheaper than that even. 8)
[13:48:20] <ssi> oh absolute cheapest lul
[13:48:32] <ssi> I dunno... if you're time is worth nothing I guess :)
[13:48:35] <ssi> your even
[13:48:38] <tjtr33> i love those indicators ( face stays still while indicator tip revolves)
[13:48:42] <archivist> glowplug, look at the etcha sketch example
[13:48:46] <Tom_itx> well by the time you make a board for it you may not come out ahead
[13:48:49] <ssi> yea I have a shars coax indicator like that
[13:49:16] <ssi> super handy for picking up bores or shafts
[13:49:19] <ssi> like jt is doing :)
[13:49:24] <tjtr33> shars coax good? i shyed off the ones at J&L when i saw 1/3 price made in china
[13:49:26] <glowplug> http://axis.unpythonic.net/etchcnc ?
[13:49:29] <ssi> it's good enough for the money
[13:49:35] <ssi> I have no complaints
[13:49:40] <tjtr33> good enuf
[13:49:56] <ssi> shars is cheap import stuff, but it's far above harbor freight quality
[13:50:01] <ssi> I buy a lot of their stuff
[13:50:10] <ssi> as a hobbyist I couldn't afford to tool my shop otherwise :P
[13:50:17] <Tom_itx> doesn't take alot to beat HF
[13:50:33] <archivist> glowplug, yes look at the servo upgrade to it
[13:50:55] <glowplug> The page is trying to load. Maybe it's down?
[13:51:26] <glowplug> emergent.unpythonic.net/projects/01142347802
[13:51:27] <archivist> its just slow
[13:51:29] <Tom_itx> loaded here
[13:51:31] <glowplug> Ahh I see.
[13:51:48] <glowplug> It finally loaded! Really slow... haha
[13:52:55] <glowplug> So this is adaptable to 3-phase drives using the BLDC HAL plugin?
[13:53:54] <tjtr33> slow might be what I saw as broken image icon, like: a script noticed the image hadnt loaded, so rendered the torn image icon in mean-time
[13:55:07] <archivist> glowplug, you may be wanting much faster response than a parallel port can give you for your encoder inputs
[13:55:25] <Tom_itx> especially quadrature
[13:55:52] <glowplug> The limitation is the parallel port uC or the RT kernel?
[13:56:08] <Tom_itx> port
[13:56:21] <ssi> if you have bad latency, then both
[13:56:36] <glowplug> I figured as much. This is why I was looking into the AVR and ARM peripheral options.
[13:56:56] <ssi> you gonna count encoder pulses in the avr?
[13:57:01] <archivist> you need a guarantee that you do not miss encoder edges/counts
[13:57:21] <ssi> thing is, this all becomes a big project
[13:57:27] <archivist> avr is not sensible use an fpga
[13:57:27] <Tom_itx> xmega might have quadrature support
[13:57:46] <ssi> archivist: yeah and by "an fpga", you mean "buy a damn mesa card" :P
[13:57:53] <ssi> someone else already blazed these trails
[13:57:54] <glowplug> I knew when I asked this question that FPGA was going to come up. Haha
[13:58:00] <Tom_itx> and uses pll for the clock so it should be quick enough
[13:58:05] <Tom_itx> and are cheap
[13:58:26] <archivist> glowplug, I do not have any mesa cards so am less biased than you think
[13:58:35] <tjtr33> 'use an fpga' would you suggest mesa or maybe 'papilio' ?
[13:58:35] <glowplug> I need six motors. Wouldn't I need an extremely expensive MESA card?
[13:58:49] <ssi> I dunno anything about their BLDC controllers
[13:59:11] <ssi> but the modern stuff does six encoder counters + 10V analog drivers
[13:59:16] <ssi> and is very inexpensive
[13:59:31] <glowplug> I think that their BLDC unit has two motor outputs.
[13:59:43] <archivist> what definition of inexpensive
[13:59:51] <ssi> I think the 7i77 is around $80
[14:00:01] <glowplug> Less than $50 to drive all six motors including power stages.
[14:00:10] <ssi> whole package with '77 and 5i25 fpga card and a cable is $220
[14:00:37] <archivist> glowplug, dont have silly expectations
[14:00:57] <glowplug> It is physically possible using parallel.
[14:00:58] <ssi> the cost of something is more than just what the mosfets will cost :P
[14:00:59] <Tom_itx> it can be done if you wanna build the hardware yourself
[14:01:37] <glowplug> Exactly. I'm looking for any solution. I can design / assemble PCB's ect.
[14:01:54] <archivist> I think 50 dolla is a low number for 6 bldc drivers
[14:02:05] <glowplug> But I hit a dead end with the AVR / ARM peripherals. There is an EMC2Arduino library but it is for steppers.
[14:02:23] <Tom_itx> a dude in #robotics usually sets a $20 budget for most of his projects
[14:02:28] <Tom_itx> and generally gets it done
[14:02:33] <ssi> down that road you're going to end up reimplementign something like the gecko step/dir servo drives
[14:02:39] <Tom_itx> re'purpose
[14:02:42] <ssi> cause you can't do proper closed loop servo system over parallel
[14:02:47] <Tom_itx> if you're up for it
[14:02:49] <Aero-Tec2> thread loop sub talks about pull outs
[14:02:55] <glowplug> Right. My motors are a pile of cd-rom motors which I will rewind.
[14:02:58] <ssi> and if you try to use a peripheral like that, you're going to offload closing the loop to the peripheral
[14:03:01] <glowplug> DIY optical encoders. ect. ect.
[14:03:14] <Aero-Tec2> anyone use thread-loop sub
[14:03:17] <Tom_itx> so save the drivers from the cdroms
[14:03:26] <ssi> Aero-Tec2: I have, yes
[14:03:27] <glowplug> If thats true then it's unsuitable. I want to use the EMC2 loop control.
[14:03:50] <ssi> glowplug: naturally... in that case you really are going to want some way to communicate with your hardware at higher speed
[14:04:03] <Aero-Tec2> ssi, can you explain it some
[14:04:09] <tjtr33> bye all thx
[14:04:18] <ssi> Aero-Tec2: lemme re-read the doc page on it real quick
[14:04:37] <glowplug> Is it know exactly how slow the parallel port is?
[14:04:37] <Aero-Tec2> there is a doc page?
[14:04:46] <glowplug> *known
[14:04:49] <ssi> http://linuxcnc.org/docs/html/gcode/gcode.html#sec:G76-Threading-Canned
[14:04:56] <Aero-Tec2> can you send the link to the doc page?
[14:04:58] <ssi> that's the one you're talking about, yea?
[14:05:11] <Aero-Tec2> no
[14:05:15] <ssi> all I've ever used is G76, sorry
[14:05:31] <Aero-Tec2> thread-loop is a sub using G33 moves
[14:05:36] <ssi> ah
[14:05:42] <ssi> what's the advantage over G76?
[14:05:58] <Aero-Tec2> tappered threads
[14:06:05] <ssi> G76 can do tapers can't it?
[14:06:14] <ssi> yea, L word
[14:06:23] <archivist> not properly no
[14:06:29] <ssi> ok
[14:06:54] <archivist> I did start looking at that...need more round tuits
[14:07:08] * ssi sends archivist some tuit stock
[14:07:19] <ssi> what does it do wrong?
[14:08:11] <archivist> it has no mention of taper angle or 1 in x distance as a taper thread is specced
[14:08:32] <Aero-Tec2> L is for starting tapper, or for pulling out of threading without relief groove
[14:08:39] <ssi> so... it works, but you have to manually calculate the details?
[14:08:44] <ssi> oh I see
[14:08:51] <ssi> yeah I've only ever used it forleadin or leadout
[14:08:57] <ssi> I've never tried to use it to make a taper thread
[14:09:18] <archivist> some think 33 is good enough...meh
[14:09:22] <Aero-Tec2> G76 does not do tapper
[14:10:07] <Aero-Tec2> I may like the thread-loop sub if I knew how to use it
[14:11:09] <archivist> g33 is borked/difficult iirc due to the problems of the thread pitch is on the angle not on the axis
[14:11:36] <archivist> so needs some calculation to use
[14:12:13] <ssi> I want to know when we're going to have an honest to god profiling cycle :/
[14:12:43] <archivist> it becomes more obvious if you want to make a fusee
[14:13:46] <glowplug> The GPIO of a linux board like a Beaglebone is significantly faster than parallel port correct?
[14:13:58] <ssi> not as is
[14:14:04] <ssi> if you use the PRU or something, then yes
[14:15:50] <glowplug> I have to do a lot more reading. I noticed the PRU and that it uses a binary blob to function.
[14:16:05] <ssi> yes, it's a microcontroller embedded into the SoC
[14:16:09] <ssi> it runs its own program
[14:16:11] <glowplug> Just off hand do you know if that has enough outputs to drive six motors?
[14:16:30] <ssi> if you disable hdmi and emmc, probably
[14:16:30] <Tom_itx> also, xmega natively supports quadrature
[14:16:35] <ssi> but you need what, nine lines per motor?
[14:16:43] <ssi> three phases and six encoder lines
[14:16:43] <glowplug> Yeah. Haha
[14:16:55] <ssi> 54 gpio... it'll be tight
[14:17:02] <ssi> but with the peripherals disabled you can maybe do it
[14:17:13] <glowplug> That might be my cheapest option right there.
[14:17:30] <ssi> might be, but it'll be a lot of work
[14:18:57] <glowplug> This project is just for my spare time. No rush. =)
[14:19:11] <ssi> well I don't just mean time
[14:19:19] <ssi> you're going to be blazing some significant trails
[14:19:41] <ssi> there's prior art for using the PRU as a stepgen, but you're going to need to write your own encoder counter and phase generator for the PRU
[14:19:48] <ssi> and then write hal drivers for your custom PRU stuff
[14:20:02] <glowplug> Yeah I'm a hardware guy....
[14:20:13] <glowplug> So nobody has used the beaglebone's PRU for BLDC yet...
[14:20:27] <ssi> not that I'm aware of (which means nothing){
[14:20:46] <ssi> I don't know a ton about electronic commutation, but i imagine it's not completely trivial from a software standpoint
[14:21:41] <glowplug> I don't think the PRU *can* be programmed can it?
[14:21:47] <ssi> yes it absolutely can
[14:21:49] <ssi> that's the point
[14:21:59] <ssi> ti distributes an assembler for it
[14:22:41] <glowplug> It's programmed IN assembler or C?
[14:22:47] <ssi> probably assembler
[14:23:06] <glowplug> Well there goes that plan. Haha
[14:23:08] <ssi> Tony,
[14:23:08] <ssi> No plans for a C compiler. The C language would add too much overhead in terms of PRU instructions and the PRU instruction RAM is already limited in size. Also, there are some useful PRU instructions and features (like directly mapping structures onto the register file) that you would not be able to leverage using C code. In reality, you should not think of the PRU as a general-purpose processor like an M3. The PRU is better suited at low-level data
[14:23:15] <ssi> Gus
[14:23:17] <ssi> from TI
[14:23:37] <glowplug> That pretty much sums it up. 8)
[14:23:46] <glowplug> I could use six of these. http://www.digikey.com/product-detail/en/MC33035DWG/MC33035DWGOS-ND/1479057
[14:24:03] <glowplug> Would I need to write custom HAL to handle them?
[14:24:36] <ssi> well back up
[14:24:41] <ssi> where are you gonna stick them? :P
[14:24:46] <ssi> how are you going to connect them to the computer
[14:24:57] <archivist> do those even have step dir inputs!
[14:25:22] <glowplug> I have geared bldc servos not steppers.
[14:25:31] <glowplug> I could easily design a board for six of them.
[14:25:32] <ssi> yes
[14:25:34] <ssi> but the point is
[14:25:36] <ssi> what controls them?
[14:25:45] <ssi> if you're doing parport, the best you can hope for is step/dir
[14:25:51] <ssi> you familiar with the gecko servo drives?
[14:25:53] <ssi> G201X I think
[14:26:06] <ssi> it presents a step/dir interface to whoever uses it
[14:26:19] <ssi> and it handles keeping track of turning that into a position command, reading encoder edges, and PID
[14:26:34] <glowplug> So to drive the MC33035 directly I would need to write a HAL interface OR translate into step/dir.
[14:26:46] <ssi> you need to BUILD a HAL interface
[14:27:03] <ssi> which means a pci card or something that has relatively high bandwidth, and a low level hal driver
[14:27:12] <ssi> which is what a mesa card is
[14:27:22] <ssi> now you see why I suggested what I did? :P
[14:28:35] <glowplug> So the parallel port is too slow even to send a "change to this speed" command to a controller?
[14:29:00] <ssi> no, but that's not closed loop
[14:29:03] <ssi> that's open loop velocity mode
[14:29:09] <ssi> and your controller has to close the position loop
[14:29:21] <ssi> and linuxcnc will have no way of knowing where the axis is
[14:29:25] <ssi> only how fast you asked it to run
[14:29:38] <ssi> now, if you make your controller accept step/dir,
[14:29:51] <ssi> then linuxcnc can infer where the axis SHOULD BE based on the starting position and how many steps it's sent
[14:30:23] <glowplug> But still wont know "exactly where it is" because LinuxCNC isn't closing the loop.
[14:30:29] <ssi> right
[14:30:38] <archivist> you can drive that IC with pwm
[14:30:39] <ssi> it assumes that the axis is always where it requests it to be
[14:30:54] <ssi> archivist: yeah that'll work, but there's still the problem of encoder feedback
[14:31:09] <glowplug> The encoder feedback goes to LinuxCNC in that case right?
[14:31:26] <ssi> yes
[14:31:33] <archivist> yes but that is where hardware counters excel
[14:31:37] <ssi> but you're not going to count them with any speed on a parport
[14:31:52] <ssi> you could build a controller that counts them in hardware and communicates over EPP
[14:31:57] <ssi> but then you've built a mesa 7i43 ;)
[14:32:09] <glowplug> I see what you did there. 8)
[14:32:28] <glowplug> The problem with the MESA cards isn't that they are perfect. Its that I need more than one of them.
[14:32:34] <glowplug> *aren't perfect
[14:32:35] <JT-Shop> for those that wondered how it came out... http://imagebin.org/263016
[14:32:36] <archivist> we admit nothing
[14:32:55] <JT-Shop> http://imagebin.org/263017
[14:32:55] <glowplug> I don't think any MESA unit can drive six BLDC motors.
[14:32:58] <glowplug> So the cost gets out of hand really fast.
[14:33:03] <ssi> so forget that
[14:33:11] <ssi> buy mesa to have a good hardware interface to hal
[14:33:15] <ssi> build your BLDC drivers
[14:33:16] <JT-Shop> http://imagebin.org/263018
[14:33:25] <ssi> the actual part that converts "whatever" to phases
[14:33:40] <JT-Shop> http://imagebin.org/263019
[14:33:40] <ssi> use those driver ICs, and mesa gear can run them with PWM
[14:33:49] <glowplug> So your suggesting using a MESA card simply for the optical encoder inputs?
[14:33:53] <ssi> or build a +/-10v analog velocity signal driven controller
[14:34:01] <ssi> for the encoder inputs and the command outputs
[14:34:09] <ssi> that's the way all my servo machines work
[14:34:12] <ssi> I use external amps
[14:34:16] <JT-Shop> part one repaired, on to the gear now http://imagebin.org/263020
[14:34:30] <ssi> the mesa hardware counts encoder edges and generates command signals
[14:34:35] <ssi> the amps drive the motors
[14:34:57] <glowplug> So the MESA can take encoder inputs from six motors and output six PWM for six MC33035's?
[14:35:03] <glowplug> That seems too good to be true.
[14:35:04] <ssi> yep
[14:35:08] <ssi> it's not
[14:35:16] <ssi> that's exactly what the board in front of me does
[14:35:21] <ssi> well it definitely does 10V analog
[14:35:24] <glowplug> Interesting!
[14:35:26] <ssi> I think it'll do pwm, but I'm not positive
[14:35:37] <ssi> and then rather than hack together a driver, I would get some of these:
[14:35:38] <ssi> http://compare.ebay.com/like/190787733680?var=lv&ltyp=AllFixedPriceItemTypes&var=sbar
[14:35:41] <ssi> or something similar
[14:35:50] <ssi> but they're massive overkill for the little motors you're working with
[14:36:09] <ssi> I've built several machines that use those AMC drives and mesa hardware
[14:36:12] <glowplug> Yeah I will just build the powerstages. My motors are less than 10 watts.
[14:36:13] <ssi> and it's a proven combo
[14:36:18] <ssi> and somebody else wrote the software already
[14:36:23] <ssi> which for you sounds like the biggest win of all
[14:36:55] <pcw_home> depending on how you do the interface one 7I43/7I90 could interface to 6 or 8 drives
[14:37:03] <ssi> there's the man
[14:37:13] <ssi> doesn't look like the '77 does PWM, but I'm sure he's got something that does
[14:37:46] <glowplug> I'm looking at the different boards right now.
[14:37:52] <glowplug> 7I43? Hmmm
[14:37:55] <pcw_home> (6 wires for PWM high/low x6 = 36 and 6 encoders = 12 so 48 total I/O)
[14:38:33] <glowplug> And it has exactly 48 I/O. O_O
[14:39:01] <ssi> that's single ended non-indexed encoders I guess
[14:39:12] <ssi> hey pete
[14:39:21] <PetefromTn> hey SSI!
[14:39:24] <glowplug> Haha
[14:39:29] <ssi> you guys make progress?
[14:39:32] <pcw_home> or only 3 wires per motor for the PWM if you driver handles the deadzone
[14:39:47] <PetefromTn> define progress...
[14:40:10] <ssi> does I can has pulleyz?
[14:40:25] <PetefromTn> Well not exacly..
[14:40:28] <PetefromTn> LOL
[14:40:43] <ssi> lol ok next question
[14:40:46] <ssi> do I need to order more? :P
[14:41:08] <PetefromTn> We managed to get some work done on the VMC, and we managed to machine Connor's pulleys, but we ran out of time for yours....
[14:41:14] <ssi> DOH
[14:41:15] <ssi> hahah
[14:41:21] <ssi> his come out good though?
[14:41:28] <PetefromTn> Also Connor was a bit unsure about your specs exactly...
[14:41:32] <PetefromTn> Seemed to.
[14:41:42] <ssi> what was he unsure about, do you know?
[14:41:55] <PetefromTn> I have not heard from him yet altho I just got back from church a bit ago.
[14:42:21] <PetefromTn> Well apparently he is using a different motor and was not sure of your tophat dimensions I think.
[14:43:18] <ssi> gotcha
[14:43:41] <ssi> well maybe I'll get the cherokee back together early in the week, and I'll just have to fly up with my motor and my head and start cracking whips ;)
[14:43:46] <PetefromTn> He did ask me to leave your pullies here so perhaps we can collaborate.
[14:43:57] <ssi> oje
[14:44:06] <ssi> when he gets online, let's find out what I can measure to help out
[14:44:56] <jd896> Hi all
[14:45:33] <PetefromTn> Okay, basically from what I recall the bottom of the pulley is mated to the top of the spindle body and there is a bored hole thru slightly larger than the splined portion and then there is some stuff on the top for that tophat as well as the encoder pulse ring.
[14:45:44] <PetefromTn> The other pulley was just bored to fit the motors shaft.
[14:46:04] <PetefromTn> Here is what I made..
[14:46:08] <PetefromTn> http://s150.photobucket.com/user/matospeter/media/Cincinatti%20Arrow%20500%20Retrofit/photo_zpsd69e5899.jpg.html?sort=6&o=0
[14:46:08] <PetefromTn> http://s150.photobucket.com/user/matospeter/media/Cincinatti%20Arrow%20500%20Retrofit/photo_zpsd69e5899.jpg.html?sort=6&o=0
[14:47:28] <ssi> cool
[14:47:37] <ssi> I'm working on wiring
[14:48:04] <PetefromTn> We did wind up removing the flanges for the pulley on the spindle since it was near impossible to get it to run concentric with them on there. I felt like we did pretty good.
[14:48:14] <ssi> good
[14:48:19] <ssi> I look forward to seeing how his runs
[14:48:20] <PetefromTn> At least they seemed to run a helluva lot truer than the other ones he made.
[14:48:43] <PetefromTn> He has quite an interesting control enclosure he built all in one piece.
[14:50:34] <jd896> Has anybody ever had any issues running o103 repeat more than once in a gcode file
[14:51:30] <PetefromTn> That plate is the Router spindle mount I designed for my VMC, I think it came out pretty nice. Still want to flycut the top and the router hole is kinda snug, debating whether or not splitting the router opening and using the pinch bolt will allow it to be flexed open just a tad to make it easier to get the router body in there.
[14:53:47] <JT-Shop> jd896: not if you use a unique number for each one and have them structured properly
[14:54:13] <jd896> Ah so say 104 repeat or?
[14:54:59] <JT-Shop> yes, use a unique number for each one so the software knows what is paired with what
[14:59:19] <ssi> 100' of wire goes entirely too fast :/
[15:00:37] <Tom_itx> get a whole spool
[15:00:47] <ssi> it's expensive!
[15:01:14] <Tom_itx> it cost me more for a 100' spool than it would have for a 1k' spool
[15:01:23] <ssi> this stuff isn't that way
[15:02:10] <JT-Shop> ssi: wiring your plane?
[15:02:19] <ssi> no, wiring a mill control
[15:02:24] <ssi> but I'm spoiled so I'm using MS22759 anyway
[15:02:39] <JT-Shop> lol, I just MTW for machines
[15:03:04] <ssi> thing is, all the tools and terminals and such that I have on hand are for aviation stuff
[15:03:24] <Tom_itx> so your mill will be flight worthy
[15:03:24] <ssi> and aviation ring terminals, for instance, are not the same as cheap stuff, and they don't use the same tools
[15:03:29] <ssi> so I'm better off just using the good stuff
[15:03:36] <ssi> Tom_itx: exactly :)
[15:03:48] <ssi> but it's just amazing how fast the wire goes
[15:03:57] <ssi> I think I pay around 20c a foot for the 22ga tefzel
[15:04:39] <ssi> at least I'm not lacing this oe
[15:04:40] <ssi> one
[15:04:48] <ssi> last one I did all with waxed nylon cable lacing :P
[15:05:04] <ssi> https://sphotos-b.xx.fbcdn.net/hphotos-prn1/p206x206/941097_10100131793347582_2132713241_n.jpg
[15:05:19] <JT-Shop> nice
[15:05:36] <mrsun> would a sliding fit be a H7 or H8 tolerance? cant remember what the broaches i have was :P
[15:05:38] <ssi> I did that one for money, so I went out of my way to make it really nice
[15:05:48] <mrsun> or will that be to big for a good fit for a pulley on an axle? :)
[15:05:49] <ssi> I'm a lot less meticulous with my own stuff for whatever reason :P
[15:12:58] <mrsun> kinda hard to make pressfits for < like 20mm :P
[15:12:59] <mrsun> imo
[15:19:06] <glowplug> I found an interesting project. https://code.google.com/p/picnc/
[15:19:25] <glowplug> He has written an extremely high speed SPI HAL driver for LinuxCNC that makes use of a PIC32 and DMA.
[15:20:31] <glowplug> There is step/dir code in there. I would need to write PWM for the MC33035's to work. But it would work. 8)
[15:23:25] <jd896> That's done the trick john perfection
[15:28:41] <Connor> Hello... Did someone say my name ? :)
[15:29:14] <ssi> MAYBE
[15:29:28] <ssi> pete said you were hung up on needing some of my measurements yesterday
[15:29:31] <ssi> let me know what I can document
[15:30:23] <Connor> On my setup.. My pulley was customized for my tophot used with my power draw bar. I wasn't sure if you was going to go that route.. or just use the standard one on the G0704
[15:31:45] <ssi> I probably need to do stock for now
[15:31:53] <ssi> eventually I would like to do a power drawbar, but I need to get it running first
[15:32:13] <Connor> DO you have a copy of hoss's plans ?
[15:32:27] <ssi> I have his conversion plans, but not the belt drive plans
[15:34:29] <Connor> you going to mount the RPM ring onto of the pulley ?
[15:34:45] <ssi> I suppose?
[15:34:51] <ssi> I know I'm going to want a spindle encoder at some point
[15:34:56] <ssi> but I don't know if that one is adequate
[15:35:08] <PetefromTn> Connor: Well???!!!
[15:36:18] <Connor> ssi I mounted my encode on the 2nd shaft of the treadmill motor.. and since I'm 1:1 it works great. The older encoder ring works nice as a way to tighten the draw bar if you have a pin wrench to go into it.
[15:36:48] <Connor> PetefromTn: Well what ?
[15:36:56] <Connor> :)
[15:37:11] <ssi> is there any downside to machining the pulley to accept the ring?
[15:37:15] <PetefromTn> Well did the damn thing we spent all evening making for you work???
[15:37:21] <Connor> ssi no
[15:37:31] <ssi> ok then I suppose that's the way to go :)
[15:37:39] <Connor> I dunno yet.. I still need to drill the 4 grub screw holes..
[15:37:47] <PetefromTn> aah..
[15:37:48] <Connor> and re-assemble everything
[15:38:13] <PetefromTn> There has got to be a better way of doing that then the four setscrew dealio..
[15:38:18] <Connor> I managed to get one of the two gaurds back on the pulley.. I think I'm going to throw it in the freezer and try the other
[15:39:28] <PetefromTn> meh.....should work.
[15:39:56] <Connor> freezer, or without flange?
[15:40:23] <PetefromTn> freezer.
[15:41:05] <PetefromTn> honestly if your motor pulley has flanges and the spindle pulley is aligned properly you probably don't need the flanges on it.
[15:41:41] <Connor> true enough.. but.. I've had way to many issues with my little freaking lathe on that sort of thing.. Flanges are nice. :)
[15:42:05] <PetefromTn> then get to pressin'
[15:42:12] <Connor> Yup.
[15:42:37] <Connor> looking for the other DVD that has the belt conversion plans...
[15:42:44] <PetefromTn> How do you feel about the way we machined that stuff yesterday?
[15:43:08] <Connor> I think it went well.. much better than what I did. I knew the run out on my pulley sucked.
[15:43:36] <ssi> have any pictures?
[15:43:58] <Connor> not yet.
[15:44:31] <Connor> okay. PetefromTn Looking at the original plans.. he called for 1.772 on that bottom of the pulley. We did it at 1.771. I think we did good. :)
[15:45:04] <Connor> He had the depth at .075.. but.. I think .150 is better.
[15:45:32] <PetefromTn> Connor: LOL not bad for a couple noobs huh.. It is probably actually 1.771 but he figured he chinese are not that smooth.
[15:45:46] <Connor> yea
[15:45:49] <PetefromTn> I think the lip was fine for the application.
[15:46:12] <PetefromTn> I swear there has got to be a better way to engage the splines...
[15:50:44] <Connor> okay. just sent you cad of the pulleys specs.
[15:51:14] <Connor> for SSI, Major diff was I lowered my encoder ring a bit.. and we counter bored it for the top hot.
[15:51:48] <Connor> SSI You planning on the bearing change ?
[15:51:56] <ssi> hadn't thought about it
[15:52:03] <Connor> Hmm.
[15:52:28] <ssi> I'm mostly in a "get it up and running" phase, but I pretty much scrapped the stock motor right off the bat
[15:52:31] <Connor> I'm not exactly sure how that will turn out with the the top hot.
[15:52:44] <ssi> if I have to make new pulleys in the future it's not the end of the world
[15:52:44] <Connor> top hat.
[15:53:05] <Connor> You might just need to counter bore it.. I'm not sure.
[15:53:12] <ssi> I can do that here
[15:53:14] <Connor> I kinda went off the reservation with mine..
[15:53:24] <ssi> I have a coax indicator and I can pick up the bore and counter bore it no problem
[15:55:40] <PetefromTn> SSI Connor Just tell me what the dimensions are and I can work on them here. whats your motor shaft size?
[15:55:59] <ssi> 14mm
[15:56:20] <PetefromTn> huh I thought Connors was 17mm
[15:56:28] <ssi> motor shafts can be very different
[15:56:31] <Connor> It was. he has a different motor. :)
[15:56:37] <Connor> afk for a bit. lunch here.
[15:56:46] <PetefromTn> yeah I know but I thought you had the same motors
[15:56:51] <ssi> no not even close
[15:57:00] <ssi> he's got a treadmill motor of some kind
[15:57:05] <ssi> I have a 3/4hp 3ph motor
[15:57:34] <PetefromTn> Okay I can machine one of the pullies for 14mm shaft..
[16:11:12] <ssi> encoder wiring: https://pbs.twimg.com/media/BOCTv7aCUAAeXvA.jpg:large
[16:11:27] <DJ9DJ> gn8
[16:17:18] <JT-Shop> your zip ties are not all facing the same way LOL
[16:18:29] <ssi> hahaa I know
[16:18:40] <ssi> and zip ties are the WRONG WAY TO DO IT
[16:18:51] <ssi> at least I installed them with a panduit GS2B
[16:18:52] <ssi> ;)
[16:30:57] <JT-Shop> http://imagebin.org/263035
[16:31:27] <JT-Shop> aww, mr cut and weld is gone... I wanted to show him how it's done
[16:33:11] <ssi> beautiful
[16:33:44] <PetefromTn> Who's Mr. Cut and Weld?
[16:34:05] <JT-Shop> I had to put a bushing in the far side of the gear too
[16:34:47] <JT-Shop> the guy from the diycnc channel where they just jabber it seems like
[16:35:14] <andypugh> ssi: Cable lacing gives a much more old-school look :-)
[16:35:22] <ssi> andypugh: I rather prefer it
[16:35:29] <ssi> andypugh: but I left my spool of lacing at the airport
[16:36:18] <ssi> a lot of guys don't bother lacing even airplanes these days, but I premake some harnesses on the bench, and there's enough stuff running through some of those bulkheads that there's no way I'd be able to pull them through the snap bushings if they were ziptied
[16:36:56] <andypugh> https://picasaweb.google.com/lh/photo/NivmHU8OuXIcP2EQHUPruNMTjNZETYmyPJy0liipFm0?feat=directlink
[16:37:14] <andypugh> I like lacing too.
[16:37:19] <ssi> beautiful :)
[16:38:44] <andypugh> I was struggloing between neatness and separating power and signal wiring ;-)
[16:39:08] <ssi> heheh
[16:39:16] <gene78> zip ties I use, but they do have one bloody disadvantage. If the tails aren't trimmed with properly placed flush cutting nippers, they can and WILL draw blood.
[16:39:31] <Jymmm> andypugh: VERY NICE wiring job!!!
[16:39:39] <ssi> gene78: hence the panduit gs2b
[16:39:46] <ssi> gene78: tensions them perfectly and flushcuts the tails
[16:39:49] <ssi> don't leave home without it :)
[16:39:56] <andypugh> Using cable ties for tying cables is like using gaffer tape for taping gaffers!
[16:40:10] <ssi> lol
[16:40:11] <gene78> chuckle...
[16:40:20] <ssi> http://www.amazon.com/Panduit-GS2B-Controlled-Tension-Cut-Off/dp/B001EU2558
[16:40:23] <Jymmm> andypugh: Stop eyeing my waxed string!!!
[16:43:14] <gene78> For that price, I'll use my 5" flush cutting dagonal cutters thank you. More of those when they are ~30~ are about a $20 bill/copy.
[16:43:32] <ssi> you can get them used for under $100 :)
[16:43:36] <ssi> good tools ain't cheap!
[16:44:03] <ssi> throw in a *proper* terminal crimper:
[16:44:03] <ssi> http://www.newark.com/te-connectivity-amp/59250/crimp-tool-pidg-strato-therm-plasti/dp/50F546
[16:45:32] <gene78> Them are worth their price. No way in hell I'd ever call the 20 dollar stuff proper. They never heard of gas tight.
[16:45:44] <ssi> and a proper D-sub pin crimper:
[16:45:45] <ssi> http://www.newark.com/daniels/afm8/hand-crimp-tool-frame-use-with/dp/90B4749
[16:46:15] <ssi> don't forget the positioner
[16:46:16] <ssi> http://www.newark.com/jsp/search/productdetail.jsp?SKU=32C0406
[16:48:23] <gene78> damn guys, the last time I had one opf those checked out was in 1960, building titan 1's. $329 then... :(
[16:48:43] <ssi> what, a daniels crimper?
[16:49:41] <gene78> No the first link to the Amp above, at $18xx bucks
[16:49:50] <ssi> ah yea
[16:50:23] <gene78> gotta run, grass is growing
[16:50:35] <ssi> sec
[16:50:46] <ssi> https://pbs.twimg.com/media/BOCdtubCAAMzKMX.jpg:large
[16:51:08] <ssi> hilarious thing is, that very well could be the pair you were checking out in the sixties
[16:57:12] <lomach> +cradek - Hi just thought i would let you know i have tried those ideas about improving the hunting on my z axis. Its a lot better now but not perfect.
[17:06:28] <PetefromTn> Lomach Whats wrong wit your Z axis.
[17:14:46] <ssi> ok enables and refs wired
[17:14:54] <ssi> now I just need drive power
[17:15:00] <ssi> and I need to wire the power supply to the IEC socket
[17:15:19] <PetefromTn> Ya mean your'e not done yet??
[17:15:20] <ssi> debating a terminal strip for that, cause I know I'm gonna need to pull 110v for the VFD
[17:15:23] <ssi> not yet!
[17:15:39] <Tom_itx> JT-Shop, nice one
[17:15:44] <PetefromTn> Love my terminal blocks..
[17:16:09] <Tom_itx> JT-Shop, now it's time to get to those papers underneath it
[17:16:20] <Tom_itx> or the parts that go with em
[17:17:19] <ssi> I don't think I have a terminal block here, is the problem
[17:17:45] <PetefromTn> I hear ya can buy them online...
[17:18:09] <Tom_itx> i hear ya can buy a wife online too
[17:18:59] <PetefromTn> bought my dog online..
[17:19:10] <ssi> buying it online loses me a minimum of two days
[17:19:23] <ssi> that's exactly the kind of hurdle that causes me to lose focus and wander off to work on something else for a month
[17:19:40] <PetefromTn> You sure do have issues man...
[17:19:47] <ssi> you have no idea
[17:20:02] <PetefromTn> ;)
[17:20:34] <ssi> speaking of losing focus and wandering off, I smell bacon
[17:20:39] <PetefromTn> Gonna go fishing here in a bit with my kids..
[17:20:54] <PetefromTn> maybe you need to go fishing, it takes your mind off..
[17:20:58] <ssi> I hate fishing :)
[17:21:16] <PetefromTn> See there's your problem..
[17:21:25] <PetefromTn> er one of em anyways..LOL
[17:21:30] <ssi> I have the opposite problem... if my brain isn't engaged, then it sits there and overanalyzes everything and causes anxiety
[17:21:42] <ssi> thats why I hate sleeping
[17:21:43] <ssi> heh
[17:21:46] <PetefromTn> I get that at night..
[17:21:51] <ssi> yea I get it at night real bad
[17:22:00] <ssi> but I get it if I try to do something "relaxing", like fishing
[17:22:02] <ssi> not engaging enough
[17:22:20] <PetefromTn> I think I figure out how to machine every detail of a part I need to make while I am trying to get to sleep. IN GREAT DETAIL>..
[17:22:27] <ssi> yea I get that sometimes
[17:22:36] <ssi> I solve tough problems by taking a shower
[17:22:39] <ssi> always comes to me in the shower
[17:23:54] <ssi> nah if I want to relax, I go flying... my brain has to do so many subconscious tasks to make that work that it doesn't have cycles left over to be an asshole
[19:18:19] -kornbluth.freenode.net:#linuxcnc- [freenode-info] help freenode weed out clonebots -- please register your IRC nick and auto-identify: http://freenode.net/faq.shtml#nicksetup
[19:18:59] <Aero-Tec2> thread depth
[19:19:16] <Aero-Tec2> need it for threading
[19:20:03] <Aero-Tec2> 0.25 x 20 G76 example uses 0.045 for thread depth
[19:21:03] <Aero-Tec2> have a calculated hight of 0.0307
[19:21:26] <Aero-Tec2> so why 45 thou in the threading example?
[19:21:54] <Tom_itx> are they measuring to different points on the thread profile?
[19:22:17] <andypugh> It's complicated
[19:22:25] <Aero-Tec2> lol
[19:22:32] <Aero-Tec2> any way to make it simple?
[19:22:33] <Tom_itx> you can use a wire for that i believe
[19:22:40] <andypugh> What shape is your tool?
[19:22:50] <Tom_itx> you can use the root diameter
[19:22:58] <andypugh> And how are you definign the tool point?
[19:22:58] <Aero-Tec2> 60 Deg point
[19:23:13] <Aero-Tec2> sharp point
[19:23:28] <andypugh> http://en.wikipedia.org/wiki/Unified_Thread_Standard
[19:23:33] <Aero-Tec2> the point being the tool zero
[19:24:00] <Tom_itx> it might need to be some percent less than the point
[19:24:38] <Tom_itx> i haven't tried singlepointing threads yet
[19:24:44] <andypugh> There is a significant difference between the perk-to-root distance of a thread, and the diameter that a sharp tool turns a diameter to and how deep it needs to go to make a proper thread.
[19:25:34] <andypugh> And it is different again for a formed tool with a root radius, as that turns a different diamater, but should cut less deep.
[19:26:25] <Aero-Tec2> I have thread triangles for measuring threads
[19:26:54] <Tom_itx> you really need a 'go' 'no-go' gage
[19:27:06] <Tom_itx> do do it 'right'
[19:27:10] <andypugh> If you lok at the diagram on that Wiki page: The nominal thread diameter is the very top point. The actual OD you need to machine to is the next diamter down, the nominal less p/8.
[19:27:13] <Tom_itx> to do*
[19:27:13] <Aero-Tec2> I do not use the wire method for measuring threads
[19:28:33] <andypugh> Then, a form tool needs to remove a further 3H/8 (plus a bit) bit a pointed tool needs to remove a 3H/8 + H/4
[19:29:22] <Tom_itx> and then there are tolerance classes for threads as well
[19:29:28] <andypugh> I claim to undertand this stuff and still always seem to need three goes at a thread and end up taking off twice as much as I expect.
[19:29:38] <Tom_itx> you can get several sizes of 1/4-20 for example
[19:30:04] <Tom_itx> tap sizes that is
[19:30:08] <Aero-Tec2> what about this formula
[19:30:11] <Tom_itx> just as an example
[19:30:17] <Aero-Tec2> 0.61343 x ( 1 / # of threads per inch)
[19:30:45] <Aero-Tec2> it seams very popular
[19:30:56] <Tom_itx> are you cutting metric or imperial?
[19:31:03] <Tom_itx> i assume they are a bit different
[19:31:21] <andypugh> I think that only works for a (correctly) rounded tool, a pointy tool needs to cut deeper to make the threads thin enough.
[19:31:40] <Aero-Tec2> but gives a thread depth of 0.0307 for 1/4 x 20 thread
[19:31:50] <andypugh> Actually, ISO and Unified are exactly the same form, just different pitch and diameter.
[19:34:47] <Aero-Tec2> so for a sharp point is 45 thou the right thread depth to use for a 1/4 x 20 thread?
[19:37:19] <andypugh> No idea :-)
[19:37:59] <Tom_itx> .0379
[19:38:17] <Tom_itx> acording to this calculator
[19:38:57] <Aero-Tec2> what calculator?
[19:39:15] <Tom_itx> www.sherline.com/thread%20calculator.xls
[19:39:39] <Aero-Tec2> 0.0383
[19:39:40] <Aero-Tec2> if you add 20% for the 80% thread
[19:40:32] <Tom_itx> http://www.bradleyteets.com/Threading.htm
[19:40:56] <andypugh> I suggest working it out from scratch from the Wiki page.
[19:41:42] <andypugh> Because the Sherline calculator does not know just _how_ pointy your tool is, nor quite how you are defining the tool point position.
[19:43:18] <Tom_itx> you would know for sure if you did the calcs
[19:43:37] <Tom_itx> but the spreadsheet might get you in the ballpark
[19:44:54] <Tom_itx> also check the machinery handbook
[19:48:21] <Tom_itx> http://www.practicalmachinist.com/vb/general/newbie-pre-threading-calculation-questions-243014/
[19:48:30] <Tom_itx> fwiw
[20:35:59] <Aero-Tec2> just did a drawing of a thread in solid works
[20:36:25] <Aero-Tec2> thread depth for 20 TPI is 0.0492
[20:37:08] <Aero-Tec2> if you use a sharp point threading tool
[20:40:03] <Aero-Tec2> I hate then things do not agree
[20:41:53] <Aero-Tec2> solid works drawing says 0.0492 for thread height, the wiki formula says 0.0433
[20:42:17] <Aero-Tec2> just about 6 thou diff
[20:42:27] <Aero-Tec2> to much for my liking
[20:42:44] <roycroft> same tolerence for both?
[20:43:10] <Aero-Tec2> and the G76 threading sample had a thread depth of 45 thou
[20:43:24] <Aero-Tec2> AFAIK
[20:51:45] <RyanS> previous msg didn't send..... is '4E' the grade of grey cast iron i need for machining ?
[21:09:56] <ssi> wb
[21:10:26] <PetefromTn> huh?
[21:10:32] <ssi> welcome back
[21:10:51] <PetefromTn> aah...
[21:11:01] <PetefromTn> thank you.
[21:11:27] <PetefromTn> just got back from Fishkin..
[21:11:43] <PetefromTn> eatin' some Italian Ices...
[21:12:00] <ssi> Aero-Tec2: does your solidworks drawing have the right outside diameter? It'll be smaller than the nominal size, and that's what produces the crest flats
[21:13:52] <Aero-Tec2> I just drew a 2D drawing of 20 TPI, then measured
[21:14:16] <ssi> does it have the right flats?
[21:14:37] <Aero-Tec2> no flats
[21:15:01] <Aero-Tec2> do you need flats?
[21:15:11] <ssi> absolutely
[21:15:29] <ssi> you should have a crest flat either way
[21:15:38] <Aero-Tec2> why?
[21:15:39] <ssi> a proper thread has a root flat, but if you use a sharp V tool, you won't have one
[21:15:55] <Aero-Tec2> taps do not have flats
[21:16:09] <Tom_itx> there is no standard adopted for the flat
[21:16:23] <Tom_itx> says machinery's handbook
[21:16:29] <Aero-Tec2> I can see why they are used
[21:16:55] <ssi> if you're trying to compare your drawing against a UN thread calculator, you WILL get different answers
[21:17:05] <Tom_itx> usually about 1/25th the pitch
[21:17:22] <Tom_itx> also says the same book
[21:17:27] <ssi> I'm pretty sure that UN does specify a standard for flats
[21:18:29] <Aero-Tec2> 20 tpi should be 1/20
[21:18:37] <Aero-Tec2> 0.05
[21:19:09] <Tom_itx> D=.866/tpi
[21:19:26] <Tom_itx> D is point to point
[21:19:29] <Tom_itx> root to crest
[21:19:35] <Aero-Tec2> =DEGREES(COS(30))*(1/E63)
[21:19:58] <Aero-Tec2> oops
[21:20:18] <Aero-Tec2> Height = cos(30deg) * P
[21:20:36] <sharpen047> hey guys im looking to convert my 3 axis cnc into a laser cutter/engraver with a co2 laser. im trying to figure out what i would need. i know id need the tube the power supply and maybe a focusing lens? but is there a special controller to tell it when to turn on and off?
[21:20:43] <Aero-Tec2> witch is what tom said
[21:20:43] <Tom_itx> D = P * COS 30 deg
[21:21:09] <Tom_itx> or P * .866
[21:22:45] <Aero-Tec2> so why the big difference from drawing to calculated value?
[21:22:53] <Aero-Tec2> 20 tpi
[21:23:20] <Aero-Tec2> 0.0433
[21:23:20] <Aero-Tec2> thread height calculated
[21:24:07] <Aero-Tec2> 0.0492 in solid works
[21:24:18] <Aero-Tec2> ooops
[21:24:36] <Aero-Tec2> got to check something
[21:26:00] <Aero-Tec2> life is good
[21:26:14] <Tom_itx> i suppose i could draw it and measure the result
[21:26:39] <Aero-Tec2> thought I had, and had meant to add the deg in drawing
[21:26:47] <Aero-Tec2> it all works out good now
[21:27:11] <Aero-Tec2> both come out to 0.0433
[21:45:21] <sharpen047> does anyone know what controls a cnc laser to turn on and off rapidly?
[21:50:04] <CaptHindsight> probably a mosfet for a LED laser
[21:51:55] <sharpen047> what sends the signal? the par port pin? to a transistor then to diode?
[21:52:07] <sharpen047> i cant find any schematics or ones to buy
[21:53:32] <CaptHindsight> what type of laser?
[21:54:09] <sharpen047> havent decided but looks like co2 works well for engraving and cutting plexiglass and engraving aluminum and wood
[21:58:14] <CaptHindsight> http://www.lightobject.com/40W-PWM-CO2-Laser-Power-Supply-P71.aspx
[21:59:35] <sharpen047> but what tells it when to power the laser?
[21:59:58] <t12> ttl
[22:00:12] <sharpen047> printer port voltage?
[22:00:15] <CaptHindsight> what do you want to control it with?
[22:01:00] <sharpen047> i have a cnc mill now controlled by emc and a g540
[22:01:18] <CaptHindsight> what do you have for spare IO?
[22:01:40] <sharpen047> i only have 4 motors connected. no limit switches or spindle control.
[22:01:57] <CaptHindsight> any extra pins on your EPP?
[22:02:28] <sharpen047> yes, i also have a second parport available. just not sure how hard it would be for the laser
[22:03:30] <sharpen047> does it just have a signal wire coming from a pin on the DB25 to the psu?
[22:06:39] <CaptHindsight> depends on the laser power supply
[22:09:20] <sharpen047> ah ok thanks though
[22:09:40] <CaptHindsight> http://retired.beyondlogic.org/spp/parallel.pdf
[22:10:57] <CaptHindsight> if your power supply has 5V TTL inputs you're set, if not you'll have to see about level shifting
[22:11:24] <sharpen047> cool, so just a wire connecting the pin with the output to the wire in on the psu?
[22:11:27] <sharpen047> its that easy?
[22:11:36] <CaptHindsight> maybe
[22:11:42] <sharpen047> depending anyway
[22:12:11] <sharpen047> hah alright well ill look more tomorrow. thanks for the help. could be the reason i cant find much info on it though. its really easy if you have the right psu