#linuxcnc | Logs for 2014-04-02

[19:02:49] <R2E4_> evening
[19:03:37] <XXCoder2> hey
[19:04:36] <PetefromTn_> evening
[19:05:02] <R2E4_> going totest cut something tonight.
[19:06:57] <XXCoder2> awesome, googles on and hand on ohcrap button ;)
[19:07:34] <R2E4_> Thats what the doors are for. no goggles.
[19:07:43] <XXCoder2> oh yea
[19:13:26] <rob_h> R2E4_ did u get sorted on the drive in the end
[19:17:51] <R2E4_> Hi Rob, Thanks a million for the manuals. Yeah, I got it worked out. The spindles running good.
[19:18:04] <rob_h> ah grate
[19:18:23] <R2E4_> I giveit a contact andit sets the spindle up for tool change inthe right orientation also.
[19:18:49] <rob_h> yea using the mag sensor
[19:19:06] <R2E4_> I'll give you a URL so you cantake the manualsback....lol
[19:19:08] <rob_h> u can give it a orient from run, and it will slow down to orient and finish there in position
[19:19:13] <R2E4_> Yeah,with the mag sensor.
[19:19:15] <rob_h> so speeds up tool change no end ;)
[19:19:30] <R2E4_> yeah, thats cool.
[19:19:53] <R2E4_> That spindle andservo isamazingly quiet and smooth.
[19:20:13] <rob_h> yellow cap motors?
[19:20:50] <R2E4_> So when its inposition, it gives me an orientationfinish so I can start the tool change.
[19:20:51] <rob_h> normaly always ballscrews that get lowd after awhile from years of use
[19:21:24] <rob_h> ye thats it. then u have to release the orient start input to let it run again or it sits in orient mode
[19:21:28] <XXCoder2> what is pros and cons of two screw or single under secrew? http://id2cnc.files.wordpress.com/2013/08/id2cnc-cabledragchain-16.jpg 2x example
[19:21:45] <R2E4_> I only have spindle driveandservo asfanuc, the rest are sanyo denki.
[19:22:05] <rob_h> aah i see
[19:22:08] <rob_h> what machine is it
[19:22:24] <R2E4_> Hitachi Seiki VM40
[19:22:36] <rob_h> nice
[19:23:22] <R2E4_> It was only used tomake small pieces, the guy made small bits and aluminum pieces for his industry.
[19:23:35] <R2E4_> so the mechanics are in reallygood shape.
[19:23:39] <XXCoder2> and he used big machine for it?
[19:23:42] <XXCoder2> dang
[19:31:52] <R2E4_> He made pieces like this. http://irmtl.com/vm40/pieces.jpg
[19:33:09] <XXCoder2> very fine parts
[19:33:30] <XXCoder2> of course, with all my lack of experence, it might be all kinds of f'd up. :P
[19:33:44] <XXCoder2> what is that thing for anyway?
[19:38:22] <R2E4_> A machine that puts rivits on jeans andclothing. He designed the machine and sold them.
[19:38:39] <XXCoder2> interesting
[19:48:44] <g_mouer> having a problem with hm2 parameters w 7i77 board. Parameters in showhal do not agree with what is shown in hm2 document online
[19:49:26] <g_mouer> ex document shows maxfullscale as a parameter but no such exists in showhal
[19:50:16] <g_mouer> big picture is I am trying to get gearchange component working with 7i77 board for spindle
[19:53:18] <g_mouer> it appears the mesa firmware has changed since the hm2 document was published for the 7i77
[19:53:43] <micges> g_mouer: what parameter?
[19:53:45] <witnit_> I use 7i77, but I just showed up, whats the deal?
[19:54:08] <g_mouer> maxlim, minlim, scalemax
[19:54:27] <g_mouer> the hm2 doc does not even list them, totally different names
[19:55:13] <micges> probably docs are outdated
[19:55:22] <g_mouer> think so
[19:55:53] <micges> now hm2 is geting params names from firmware so that's why names changed
[19:56:00] <R2E4_> output_max_limit?
[19:56:59] <g_mouer> trying to setup gearchange component for spindle w 2 speed belt drive 7i77 has maxlim,minlim,scalemax that need to be set along with very similar inputs to the gearchange component thats where I am running into a wall
[19:57:21] <witnit_> I would suggest building a standalone config just for that
[19:57:42] <g_mouer> can't get 7i77 params to set at 2000, 2000, -2000 for example, they come up as 10, 10, -10
[19:58:23] <micges> g_mouer: names were changed but they work the same
[19:58:28] <R2E4_> where are you putting the 200,-2000, -2000 at?
[19:58:41] <XXCoder2> HMM
[19:58:49] <XXCoder2> http://zero-divide.net/index.php?page=fswizard does have plunge feed rate?
[19:59:08] <R2E4_> ini file, I have 6000 in mine and it works
[19:59:14] <g_mouer> using a mux2 to select either 2000 or 8000 max rpm, mux output netted to hm2 maxlim parameter
[20:00:40] <g_mouer> it worked until I tried setting up gearchange, not sure why maxlim parameter is not passing from mux2 output to hm2 maxlim parameter properly
[20:02:08] <micges> probably becouse you can't net with parameter
[20:02:30] <g_mouer> making that connection with net mux2.0.out hm2........analogout5-maxlim mux2 out shows as 2000 but hm2 maxlim shows as 10
[20:02:43] <g_mouer> ah net is wrong way to make connection
[20:02:58] <g_mouer> how can I tie the mux2 output to the parameter?
[20:03:02] <micges> you should get error when you try net mux to hm2 param
[20:03:13] <g_mouer> nope no error thrown
[20:03:37] <g_mouer> showhal shows connection from mux out to hm2....maxlim
[20:03:38] <micges> pastebin.com your hal please
[20:03:51] <g_mouer> ok, give me a second
[20:04:08] <micges> and what linuxcnc version on what system
[20:04:09] <micges> ?
[20:08:59] <g_mouer> 2.6 master
[20:09:46] <g_mouer> dang computer hung when I plugged in thumb drive, getting pastebin, back in a min
[20:13:21] <tjtr33> CaptHindsight, did you check the values of those 3 ? hal.is_rt hal.kernel_version actual_kernel
[20:21:50] <g_mouer> http://pastebin.com/Nan8rHX0 geesh had to fight a bum thumb drive lol
[20:22:38] <g_mouer> not a full working hal for spindle, was coding and testing for errors as I went, no errors at this point
[20:22:52] <micges> it is generated or by hand?
[20:22:54] <g_mouer> only pastebin the hal section in question
[20:23:13] <g_mouer> original hal was pncconf but lots of mods since then
[20:23:22] <g_mouer> code in question is hand coded
[20:23:46] <micges> syntax is 'net signame pin1 pin2 ... pinx'
[20:23:56] <g_mouer> didn't realise you can't net with a parameter
[20:24:32] <g_mouer> micges, thats what I normally do, but experimented in this case, tried to connect pin to parameter
[20:24:38] <micges> so 'net hm2_5i25.0.7i77.0.1.analogout5-scalemax mux2.0.out' need signal name after 'net'
[20:24:51] <g_mouer> show hal shows connection is made
[20:25:13] <micges> yes just hal of connection
[20:25:16] <micges> half
[20:25:21] <g_mouer> scalemax is parameter, muxout is pin, will that work?
[20:26:04] <micges> no
[20:26:11] <g_mouer> need to select 2 diff values for max and pass it to parameter
[20:26:36] <g_mouer> mux2 selects between 2 values how to connect mux out to parameter?
[20:26:59] <g_mouer> never gone there before in my previous hal adventures
[20:28:04] <g_mouer> prob is gearchange component has pin that needs max value, 7i77 param also needs same value set
[20:28:17] <g_mouer> 2 diff values for 2 speed belt drive
[20:29:59] <micges> you should leave hm2 params alone, set to max and try to limit signal which is passed to analogout5
[20:32:45] <g_mouer> analog out need to output 10V at either 2000 or 8000 rpm depending on gear, hm2 maxlim, minlim and scale can't be same for both, no?
[20:33:54] <g_mouer> usually a requested rpm is passed to the mesa, the conversion to output voltage is done in hm2 firmware
[20:34:20] <g_mouer> via minlimit, maxlimit and scale
[20:36:14] <micges> set min max scale to 8000
[20:37:04] <micges> and then add mux which will scale rpm x 4 on first gear before go to hm2
[20:37:06] <g_mouer> for example, when operating with single speed 8000 rpm spindle, pncconf set scalemax=8000 minlim=-8000 maxlim=8000 that works nicely but now I need to get 2 speed belt drive setup
[20:37:22] <micges> and scale by x1 at second gear
[20:38:06] <R2E4_> Whats wrong with gearchange comp? http://linuxcnc.org/docs/html/man/man9/gearchange.9.html
[20:38:18] <g_mouer> hmmmm something very similar is built in gearchange component
[20:38:30] <g_mouer> input pins to gearchange
[20:40:09] <g_mouer> R2, I am using gearchange comp ! interfacing with the 7i77 is where the plot thickens same values need to pass to mesa board as used for gearchange comp
[20:40:11] <micges> sorry I need to go sleep, it's 4 am here
[20:40:19] <micges> 'nite
[20:40:25] <g_mouer> k thanks
[20:41:10] <g_mouer> think the basic problem here is how I can pass a float value from a pin over to a parameter
[20:41:19] <g_mouer> net command won't do that
[20:44:02] <R2E4_> look atthis thread http://www.linuxcnc.org/index.php/french/forum/10-advanced-configuration/15717-spindle-control-with-gearchange-and-near?start=6
[20:44:48] <PetefromTn_> Well were you able to make some chips tonite R2?
[20:46:28] <g_mouer> thanks r2 will look nite all
[20:56:21] <zeeshan|2> steam engine coming together
[20:56:22] <zeeshan|2> http://i.imgur.com/prFiDFG.jpg
[20:56:23] <zeeshan|2> slowly
[20:56:33] <XXCoder2> awesome
[20:56:38] <R2E4_> I'm workingon it. Had to connect coolant plumbing cause I forgot I disconnected it to fix tank, andnow I amcleaning the floor.
[20:56:41] <XXCoder2> you heard of stirling motor?
[20:56:44] <zeeshan|2> yea
[20:56:54] <XXCoder2> I hope to build one of those someday
[20:59:39] <XXCoder2> no plans online to build stirling by router cnc. drat
[21:00:44] <XXCoder2> theres awesome stirling motor build by "thefordboy" in youtube
[21:00:58] <XXCoder2> he made all parts, by casting then milling
[21:02:01] <PetefromTn_> Yeah man I know the feeling. I remember when I first tried to fill my coolant troughs everything looked great until I got like fifteen gallons in there and then it all started to run out on the floor from basically everywhere... It was a beotch.
[21:02:40] <XXCoder2> https://www.youtube.com/user/myfordboy
[21:02:47] <XXCoder2> pete ow
[21:02:59] <XXCoder2> should do tests
[21:04:31] <zeeshan|2> XXCoder2: yea im subscribed to his channel
[21:04:40] <zeeshan|2> i like his fan he made
[21:04:55] <XXCoder2> zee I love that channel because hes awesome, AND videos is captioned or has text in video
[21:04:56] <PetefromTn_> actually while they did not appear to be that bad they had tiny pinholes that weeped. I was able to suck most of it out with a pump and then kinda dam it up with towels while I wiped it all up around the troughs. Wound up sealing everything up with epoxy and then an epoxy based paint after tig welding the most offensive holes..
[21:05:10] <zeeshan|2> haha yea man
[21:05:15] <zeeshan|2> you dont even need to distrube the wife at night
[21:05:16] <zeeshan|2> :D
[21:10:49] <XXCoder2> https://www.youtube.com/watch?v=Mr1kZ5RN42s nice
[21:11:33] <zeeshan|2> rofl
[21:11:37] <zeeshan|2> i like his baked potatoe break
[21:11:38] <zeeshan|2> in between
[21:11:42] <XXCoder2> yeah
[21:12:09] <zeeshan|2> poor plastic lego man
[21:12:11] <zeeshan|2> VAPORIZED
[21:12:22] <XXCoder2> what?
[21:12:25] <XXCoder2> nah
[21:12:53] <XXCoder2> even if not vaporized its still destroyed - he filled in gaps and stuff to help make mold
[21:13:04] <zeeshan|2> :D
[21:14:26] <PetefromTn_> https://www.youtube.com/watch?v=6BcfYsH4jyM Nice clean lathe CNC retrofit with LinuxCNC..
[21:15:12] <zeeshan|2> looks like a kid made the interface
[21:15:13] <zeeshan|2> =D
[21:16:05] <zeeshan|2> http://www.siemens.com/press/pool/de/pressebilder/2009/drive_technologies/300dpi/idt2009072015-01_300dpi.jpg
[21:16:10] <zeeshan|2> we need to copy that interface
[21:16:13] <zeeshan|2> :D
[21:16:59] <XXCoder2> grab a keyboard, grab circuit board off it, build keyboard on interface box heh
[21:17:44] <zeeshan|2> i honestly liked the sinumerik interface better than the i series fanuc interface
[21:18:07] <zeeshan|2> the siemens was more intuitive
[21:18:16] <XXCoder2> if my laptop works on controlling cnc I will break it apart into nice flat screen
[21:18:38] <XXCoder2> and reuse its keyboard into front panel keyboard. wy not?
[21:18:47] <humble_sea_bass> DIDN'T we agree you werent gonna use a laptop
[21:18:52] <zeeshan|2> lol
[21:19:00] <XXCoder2> humble_sea_bass: thats why I said if it works..
[21:21:26] <humble_sea_bass> one day I'll sit down and get properly acquainted with Siemen's NX
[21:23:33] <zeeshan|2> humble_sea_bass: :D
[21:26:00] <PetefromTn_> https://www.youtube.com/watch?v=vC5B_l5HuQQ JT showin' us how it is done LOL
[21:28:46] <PetefromTn_> https://www.youtube.com/watch?v=G4-lUNa0CpY JT showing us how NOT to do it hehe
[21:28:59] <Connor_iPad> What's up?
[21:29:13] <PetefromTn_> hey man howsitgoing
[21:29:34] <XXCoder2> pete I guess it didn't rotate to correct tool?
[21:29:56] <zeeshan|2> looked like it crashed into his spindle
[21:29:57] <zeeshan|2> lol
[21:30:01] <XXCoder2> or mashed into yeah
[21:30:20] <PetefromTn_> It said something about incorrect offsets..
[21:30:32] <Connor_iPad> PetefromTn_: Doing good.
[21:30:49] <XXCoder2> heh this is why my first cnc will have fairly crappy bed - I know Ill crill into it or something lol
[21:30:53] <PetefromTn_> obviously NOT good. Does not look like it did much damage tho.
[21:31:17] <zeeshan|2> its called doing trial runs :P
[21:31:19] <PetefromTn_> Connor_iPad thats good.
[21:32:08] <PetefromTn_> My wife has to work on Friday which sucks but I am off... Gonna try to make that encoder plate finally. Got some material set aside for it.
[21:32:25] <Connor_iPad> Good deal.
[21:32:45] <XXCoder2> interesting Z axis rail setup https://www.youtube.com/watch?v=qlXCdfPsQUU
[21:32:48] <PetefromTn_> Trying to decide if I should use that multi strand cable that is already run for the old resolver.
[21:33:49] <PetefromTn_> thats kinda funny plasma cutting atop sawhorses with the fan to blow away the sparks.... I am sure he was just doing some testing...
[21:33:51] <Connor_iPad> How many conductors does it have?
[21:34:06] <PetefromTn_> Not enough as I recall.. Lacking one I think.
[21:35:17] <Connor_iPad> You need 8 if you want all to be differential.
[21:35:31] <PetefromTn_> The guys at the shop today were working on a very large two piece circular clamp assembly. It was steel and like 60" across and the two halves were 3" thick...
[21:35:49] <Connor_iPad> Index probably could probably be non differential.
[21:35:56] <PetefromTn_> Apparently they were plasma cut by a local shop. I was not aware they could cut that thick...
[21:36:13] <PetefromTn_> yeah I know we need eight thus my dilemma LOL...
[21:36:41] <Connor_iPad> Yea, but if you run index as in differential you only need 7.
[21:36:45] <PetefromTn_> would it work like that or perhaps I should just run some more wire... It is gotta go thru the cable chain atop there..
[21:37:21] <Connor_iPad> That cable shielded ?
[21:37:29] <PetefromTn_> I dunno...
[21:37:39] <Connor_iPad> If it is, use shielding as ground.
[21:38:19] <PetefromTn_> It has a plastic jacket but not sure if it has shielding inside it. Gotta cut some off of it because it is way longer than I am gonna need. It used to run all around the inside of the enclosure..
[21:39:01] <PetefromTn_> you think we can use the shielding as the ground on the encoder then huh.. Never thought of that.
[21:39:11] <skunkworks> you don't want to use shielding as ground... (terminated at both ends..)
[21:39:37] <Connor_iPad> skunkworks: Even if he's using it differential encoder?
[21:39:39] <PetefromTn_> noise huh...
[21:39:56] <zeeshan|2> how much is a 100lb anvil
[21:39:58] <zeeshan|2> typically
[21:40:17] <zeeshan|2> http://ontario.kijiji.ca/c-buy-and-sell-tools-hand-tools-Steel-Italian-Pattern-Anvil-W0QQAdIdZ580111366
[21:40:19] <PetefromTn_> man I can't wait to have rigid tapping on this monster..
[21:40:23] <zeeshan|2> like this guy is selling a 44lb one
[21:40:35] <zeeshan|2> for 180
[21:40:48] <PetefromTn_> We were rigid tapping some pipe threads into a bunch of parts today and I was kinda drooling on it hehe
[21:41:16] <PetefromTn_> Something I noticed just now watching videos of LinuxCNC retrofits on youtube.
[21:41:50] <Connor_iPad> skunkworks: What about Ethernet patch cable? (Stranded since it has to go into spindle). Probably no shielding.
[21:41:54] <PetefromTn_> When the Haas machines rigid tap they kinda go to the safe Z and stop then start the spindle and then start the plunge timed to the speed of course.
[21:42:14] <PetefromTn_> But the linuxCNC videos the cutter appears to be spinning the entire time.
[21:42:34] <PetefromTn_> does this mean that if you tried to go into the same hole again you would snap the tap?
[21:42:43] <tjtr33> only gnd the shield at one end http://www.edn.com/electronics-news/4381145/Grounding-and-shielding-No-size-fits-all
[21:42:52] <PetefromTn_> I thought peck tapping was possible with linuxCNC...?
[21:43:36] <Tom_itx> PetefromTn_ pretty sure they're timed off the spindle index
[21:43:42] <PetefromTn_> That damn encoder cable is quite long... I am sure it was probably shielded but I gotta cut it open and remove their special end
[21:43:55] <PetefromTn_> Tom_itx What is Haas or LinuxCNC?
[21:43:55] <Tom_itx> so it should be repeatable
[21:44:06] <Tom_itx> i don't know about haas
[21:44:37] <PetefromTn_> That is my question actually because the Haas appears to kinda orient before the cutter starts spinning and then it plunges.
[21:45:05] <Tom_itx> maybe that's just how they chose to code the cycle
[21:45:08] <PetefromTn_> Is this just a difference in programming techniques or does linuxCNC kinda do it while it is spinning and you just cannot see it?
[21:45:33] <Tom_itx> i'm thinking that's the case
[21:45:58] <zeeshan|2> im suprised this being a linux based channel
[21:46:01] <zeeshan|2> not many people say RTFM :D
[21:46:03] <Tom_itx> otherwise you wouldn't need an index pulse
[21:46:07] <skunkworks> Connor_iPad: I have a roll of strainded network cable with shield that I use..
[21:46:24] <Tom_itx> zeeshan|2 we're tolerant for the most part
[21:46:30] <zeeshan|2> i noticed
[21:46:31] <zeeshan|2> :D
[21:47:52] <zeeshan|2> pretty sure g33.1 explains this
[21:48:06] <Connor_iPad> I'll have to look for some. Can't get shield patch cable at hardware stores.
[21:48:27] <Connor_iPad> Can get 25' and 50' patch cables
[21:48:32] <PetefromTn_> Can we get it local?
[21:48:52] <Tom_itx> i can :D
[21:49:03] <PetefromTn_> where?
[21:49:13] <Tom_itx> what is it you're after?
[21:49:20] <zeeshan|2> http://linuxcnc.org/docs/html/gcode/gcode.html#sec:G33_1-Rigid-Tapping
[21:49:22] <PetefromTn_> and would this be better than the cable I have in the machine...
[21:49:28] <Connor_iPad> Solid yes. Stranded. Maybe. Shields might have it. Not sure if they'll sell by the foot.
[21:49:37] <Tom_itx> i doubt it
[21:49:45] <Tom_itx> most don't do that anymore
[21:49:54] <Tom_itx> i bought a spool for my steppers
[21:49:58] <PetefromTn_> we probably want stranded because of the movement I would think..
[21:50:16] <Connor_iPad> Correct.
[21:50:20] <zeeshan|2> how many wires
[21:50:28] <Connor_iPad> 8 conductor.
[21:50:32] <PetefromTn_> That blue stuff my son in law gave me is not shielded right?
[21:50:36] <Tom_itx> i got a bit of that i think
[21:50:37] <MrHindsight> http://www.ebay.com/itm/310385448264 has an adjustable focus lens that can close up <1" but only 640x480
[21:50:43] <Connor_iPad> No. And it's solid too
[21:50:43] <Tom_itx> 8 or 9 with shield
[21:50:48] <zeeshan|2> might be too ghetto for you
[21:50:48] <zeeshan|2> but
[21:50:52] <MrHindsight> not bad for under $5
[21:50:53] <zeeshan|2> what about using 2 serts of alarm cable
[21:50:54] <zeeshan|2> :D
[21:51:06] <Tom_itx> iirc i used it for a rs232 patch cable or such
[21:51:08] <zeeshan|2> i know sayal electronics locally has 8 w shielded
[21:51:09] <zeeshan|2> 18 gauge
[21:51:18] <Tom_itx> alarm is usually solid
[21:51:23] <Tom_itx> and not shielded
[21:51:27] <zeeshan|2> wut
[21:51:33] <zeeshan|2> home depot sells shielded!
[21:51:39] <Connor_iPad> The stuff I got was stranded and shielded. But only 4 conductor.
[21:51:53] <PetefromTn_> at Home despot?
[21:52:09] <PetefromTn_> that grey wire you bought?
[21:52:15] <Connor_iPad> Ethernet patch cable would work. But as far as I know, they don't sell stranded. Only solid.
[21:52:20] <Connor_iPad> PetefromTn_: Yes
[21:52:41] <Tom_itx> the premade patch cables are stranded
[21:52:42] <PetefromTn_> that same thing probably comes in eight wire I would think...
[21:52:54] <Tom_itx> the spool i got was solid
[21:52:57] <Connor_iPad> Tom_itx: Yup they are. But are they shielded?
[21:53:06] <Tom_itx> not that i can remember
[21:53:12] <Tom_itx> they rely on twisted pairs
[21:53:22] <zeeshan|2> tis a differential signal isnt it
[21:53:25] <zeeshan|2> doesnt need to be shielded
[21:53:31] <Connor_iPad> Yea. DO we need shielding?
[21:53:35] <zeeshan|2> no
[21:53:39] <Tom_itx> of course you do
[21:53:41] <zeeshan|2> defeats the purpose of differential
[21:53:43] <zeeshan|2> signal
[21:53:57] <Tom_itx> they're not doing differential are they?
[21:54:04] <zeeshan|2> i heard differential earlier
[21:54:07] <Connor_iPad> This one is. Yes
[21:54:17] <PetefromTn_> I crawled up there again today after work and remembered I needed to turn a little piece that threads into the top of the motors shaft.
[21:54:26] <zeeshan|2> connor one day i will do a test!
[21:54:35] <Connor_iPad> Thats why i was thinking of using the existing 7 conductor plus shielding ..
[21:54:35] <skunkworks> I would ask peter.. You may get by without shielded.. (if it is differential..) (I would rather have shielded..
[21:54:36] <zeeshan|2> ill turn on an induction furnace next to a differential signal twisted pair
[21:54:37] <zeeshan|2> =D
[21:54:41] <PetefromTn_> I would prefer it is shielded simply due to the proximity of the VFD to the area it goes into...
[21:55:18] <Tom_itx> how long?
[21:55:20] <PetefromTn_> that and the fact that my toolchanger's safety will rely on the signal...
[21:55:50] <PetefromTn_> I would guess less than 12 feet probably less than that...
[21:56:15] <Connor_iPad> Have to go through the e-chain.
[21:56:37] <PetefromTn_> Yeah but after that it is probably like four feet into the cabinet and into the 7i77....at best.
[21:57:12] <Connor_iPad> Loke i said, you could use the existing and not do differental on the index.
[21:58:27] <PetefromTn_> I don't mind buying some cable I mean how much could it be that short.... there is an electrical supply house down in Maryville I bought all my heavy cables for to wire up the machine they had TONS of different cables there. I just do not know what to ask for.
[21:58:28] <zeeshan|2> man
[21:58:37] <zeeshan|2> i wanna see some videos on a 1" NPT tap
[21:58:46] <zeeshan|2> in rigid tap mode
[21:58:52] <zeeshan|2> cant find
[21:59:23] <Tom_itx> http://www.newark.com/belden/9539-060100/cable-shld-multicond-9cond-24awg/dp/03F1645?CMP=KNC-GPLA
[21:59:27] <Connor_iPad> Monoprice has 25' 24awg cat5e STP patch cable for 5.80
[21:59:29] <Tom_itx> i've got a few feet of tat
[21:59:30] <Tom_itx> that*
[21:59:35] <zeeshan|2> 126$!
[21:59:58] <Connor_iPad> Part number 6357
[22:00:02] <Tom_itx> it's a spool silly
[22:00:10] <PetefromTn_> We are rigid tapping some aluminum blocks with a rather large Pipe tap at work right now. The big tap I cannot remember the size has gotta be close to that. Will probably be setting it up tomorrow or monday.
[22:00:21] <zeeshan|2> make a video
[22:00:23] <zeeshan|2> :D
[22:00:34] <skunkworks> https://www.youtube.com/watch?v=2E3PMooch1k
[22:00:40] <Connor_iPad> 50' for 10.06
[22:00:46] <zeeshan|2> skunkworks: cheater
[22:00:49] <zeeshan|2> thats a straight tap
[22:01:00] <zeeshan|2> and i like how you're tapping wood
[22:01:02] <zeeshan|2> :)
[22:01:14] <skunkworks> first tests in wood
[22:01:16] <zeeshan|2> haha yea
[22:01:18] <PetefromTn_> That is not a pipe tap so ti doesn't count LOL
[22:01:24] <skunkworks> :)
[22:01:27] <Tom_itx> you can get it for less than a dollar a foot here: http://www.mouser.com/ProductDetail/Belden-Wire-Cable/9539-060500/?qs=3GlWXLpqASS7Gz%252b0s8JnMA==
[22:01:29] <zeeshan|2> straight tap like that doesnt take much torque
[22:01:34] <Tom_itx> 500' spool
[22:01:40] <zeeshan|2> especially since its a spiral tap
[22:01:45] <zeeshan|2> and clears the chips
[22:01:54] <zeeshan|2> npt taps are retarded
[22:02:33] <PetefromTn_> Hey just watched that video again and your spindle seems to orient before it starts the canned cycle like the Haas does. SWEET!
[22:02:36] <Connor_iPad> Can you thread mill npt ?
[22:02:45] <PetefromTn_> I think so..
[22:02:51] <zeeshan|2> big enough tap yea
[22:02:53] <zeeshan|2> er
[22:02:59] <zeeshan|2> big enough npt size yes
[22:02:59] <PetefromTn_> but we were just tapping them normal..
[22:03:12] <zeeshan|2> i guess for greater than 3/8 npt it makes more sense to thread mill
[22:03:16] <PetefromTn_> this part we were doing had three NPT holes in it...
[22:04:10] <zeeshan|2> i googled http://www.cutting-tool-supply.com/Greenfield/ThreadMills/ThreadMill.jpg
[22:04:11] <PetefromTn_> It was actually quite easy in that 6061 I was afraid of chip clearance issues but it just went in and out quick and clean.
[22:04:12] <zeeshan|2> wow
[22:04:14] <skunkworks> I think what you are seeing is the spindle shifting gears
[22:04:17] <zeeshan|2> i've N EVER seen that type of indexable tool before
[22:04:19] <zeeshan|2> MUST GET!
[22:04:32] <zeeshan|2> on the right and left
[22:04:58] <PetefromTn_> oh really.. so that little stop and start was just shifting gears then huh.
[22:05:38] <zeeshan|2> hey skunkworks
[22:05:39] <zeeshan|2> why 400rpm?
[22:06:02] <skunkworks> https://www.youtube.com/watch?v=22dWg3GbywE
[22:06:32] <skunkworks> zeeshan|2: because the spindle has a lot of mass and the vfd has a limit as to how fast it can reverse
[22:06:40] <zeeshan|2> why not go slower
[22:07:30] <skunkworks> zeeshan|2: like https://www.youtube.com/watch?v=LLcztAbgEcU
[22:07:48] <PetefromTn_> On my Rf45 I tapped at 3-400 RPM but I never really tapped above 1/2 inch or so..
[22:07:49] <zeeshan|2> that feels safer :D
[22:09:04] <zeeshan|2> hm
[22:09:17] <zeeshan|2> speed = 4*100/1 = 400 rpm
[22:09:23] <PetefromTn_> Jeez that monster must have enought torque to spin the earth at that low speed gear LOL... You gotta have tons of time into that spindle gearing logic and automation.
[22:09:26] <zeeshan|2> so 400 rpm is actually ideal for that tap
[22:09:29] <zeeshan|2> just seems really fast!
[22:09:58] <zeeshan|2> was your feedrate 28.5714 ipm?
[22:10:04] <zeeshan|2> (14 tpi thread)
[22:10:16] <tjtr33> a pipe tap engages fully very suddenly. best to run a pipe reamer 1st. still the sudden heavy load requires care to rigid tap.
[22:10:31] <Connor_iPad> zeeshan|2: The feed syncs to the spindle v
[22:10:45] <zeeshan|2> Connor_iPad: yes but how is it calculating it
[22:10:47] <zeeshan|2> speed / tp i ?
[22:10:50] <zeeshan|2> speed / tpi ?
[22:10:54] <Connor_iPad> Index
[22:11:30] <zeeshan|2> cause i dont see a 'tpi' for g33.1
[22:11:42] <zeeshan|2> nm
[22:11:44] <PetefromTn_> that is in the feed.
[22:11:45] <zeeshan|2> its controlled by "K"
[22:12:00] <zeeshan|2> makes sense
[22:12:07] <zeeshan|2> you'd just do 1/14 for the feedrate
[22:12:55] <PetefromTn_> I usually just let my Cam worry about it.
[22:13:07] <zeeshan|2> yea but it's good to double check stuff
[22:13:13] <zeeshan|2> rather than have a broken tap stuck in your work piece
[22:13:23] * Tom_itx nods
[22:13:39] <zeeshan|2> in the g33.1 documentation
[22:13:50] <zeeshan|2> there is no mention of slowing down the spindle prior to reversing direction
[22:13:52] <zeeshan|2> weird
[22:14:15] <zeeshan|2> i guess that can be controlled through the vfd
[22:14:21] <zeeshan|2> using deceleration / acceleration time
[22:14:45] <zeeshan|2> but linuxcnc wouldnt know that.... hmm
[22:14:46] <PetefromTn_> Thats because it does not matter how fast or slow it slows down.
[22:15:00] <zeeshan|2> and if you were threading a blind hole, game over
[22:15:07] <PetefromTn_> the spindle speed is tied to the feedrate it is synched.
[22:15:11] <Connor_iPad> Yea. K sets TPI
[22:15:36] <Connor_iPad> 0.05 is for 20 TPI
[22:15:40] <zeeshan|2> i understand that
[22:15:43] <zeeshan|2> what im saying is this
[22:15:57] <zeeshan|2> say you were tapping a 1" deep threaded hole.. (lets say it was 1/4-20)
[22:16:08] <zeeshan|2> your decel time is set to 10 seconds on your vfd
[22:16:11] <PetefromTn_> we understand that if you are not careful you could bottom out.
[22:16:29] <zeeshan|2> lets say the machine is synced and you've tapped about 3/4" of the threaded hole
[22:16:42] <zeeshan|2> when does the command for reversing kick in?
[22:16:55] <Connor_iPad> Based on the Z depth.
[22:17:05] <PetefromTn_> I don't think you should have a decell time in there really..
[22:17:09] <Connor_iPad> When z depth is reached. Spindle is reversed.
[22:17:21] <zeeshan|2> yea but the spindle reverse will take 10 seconds
[22:17:29] <zeeshan|2> so if i've reaching 1"
[22:17:36] <zeeshan|2> and i command a spindle reverse at that point
[22:17:38] <skunkworks> so it does overshoot.. normally on current machines - the spindle revearsal is pretty instantanious..
[22:17:40] <Connor_iPad> Doesn't matter. The z feed slows down to match the feed
[22:17:48] <zeeshan|2> connor it does matter
[22:17:50] <zeeshan|2> itll overshoot
[22:18:21] <PetefromTn_> skunkie is right.. at around 400 RPM my spindle stops and reversed in the blink of an eye.
[22:18:23] <zeeshan|2> skunkworks: i guess if you set your decel time to something small like 1 sec
[22:18:35] <zeeshan|2> and plus the friction of forming a thread
[22:18:40] <zeeshan|2> will stop the spindle almost instantaneously
[22:19:00] <skunkworks> right
[22:19:07] <zeeshan|2> PetefromTn_: are you sure?
[22:19:10] <PetefromTn_> Servo spindles can do that at a couple thousand RPM.
[22:19:15] <zeeshan|2> your decel time was set to the default time
[22:19:15] <Connor_iPad> Yup. Mine reverses in about 1 second.
[22:19:48] <zeeshan|2> Connor: VFD?
[22:19:51] <PetefromTn_> quite sure.. I have watched it reverse and I think Connor has too.. It is almost instantaneous.
[22:20:00] <Connor_iPad> No. SCR
[22:20:03] <zeeshan|2> ah
[22:20:13] <zeeshan|2> i honestly always thought having a 0 decel and 0 accel time on a vfd
[22:20:15] <zeeshan|2> was a bad thing
[22:21:24] <skunkworks> well - too fast acc/dec may be bad if your axis can't keep up...
[22:22:15] <PetefromTn_> Can't wait to try it LOL..
[22:22:16] <zeeshan|2> i guess ill have to experiment it on the lathe
[22:22:45] <zeeshan|2> the way i've power tapped is just keep the tail stock loose
[22:22:51] <zeeshan|2> shove the tap in
[22:22:56] <zeeshan|2> and let it do work, reverse manually
[22:23:06] <Tom_itx> Connor_iPad, 1 sec is an eternity
[22:23:21] <PetefromTn_> I musta done that a bazillion times on my lathes...
[22:23:24] <Connor_iPad> Could be faster.
[22:23:31] <tjtr33> yes "one mississippi" is a looong time
[22:23:32] <Connor_iPad> I never timed it.
[22:23:43] <PetefromTn_> none are cnc..unfortunately.
[22:23:45] <zeeshan|2> i guess it'd be nice to hqave a brake!
[22:23:48] <zeeshan|2> on a vfd
[22:24:16] <Connor_iPad> My SCR has a break resistor.
[22:24:21] <zeeshan|2> i know we used to advertise 0.01 s braking time
[22:24:23] <zeeshan|2> for the eaton vfd
[22:24:38] <PetefromTn_> my Spindle has a braking resistor.
[22:24:48] <zeeshan|2> oh
[22:24:53] <zeeshan|2> thats why it stops so fast :D
[22:24:56] <Tom_itx> you can make them from a stove element
[22:25:06] <PetefromTn_> yeah I know LOL...
[22:25:17] <zeeshan|2> then you get yourself a nice heater
[22:25:20] <zeeshan|2> to warm your hands on
[22:25:21] <zeeshan|2> :D
[22:25:27] <PetefromTn_> bitch can get hot too....
[22:25:29] <Connor_iPad> His Z uses that.
[22:26:04] <PetefromTn_> I need to get one of those digital infrared thermometers and test it...
[22:26:11] <zeeshan|2> did you make your own resistor?
[22:26:17] <Connor_iPad> I have one.
[22:26:20] <PetefromTn_> yeah..
[22:27:03] <zeeshan|2> says i need a 300W 70 ohm resistor
[22:27:06] <PetefromTn_> they actually fit quite nicely between the column and the side of the enclosure where nobody will walk up and touch them when they are hot.
[22:27:16] <zeeshan|2> rofl
[22:27:19] <zeeshan|2> its 500$ from eaton
[22:27:21] <PetefromTn_> Plus I put them up high..kinda.
[22:28:10] <PetefromTn_> The haas machines have a metal enclosure that sits atop the coolant enclosure that houses two of them presumably for the z and spindle brakes.
[22:29:03] <zeeshan|2> http://documents.tycoelectronics.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Data+Sheet%7F9-1773453-2%7FA%7Fpdf%7FEnglish%7FENG_DS_9-1773453-2_A.pdf
[22:29:11] <zeeshan|2> this style is 33$ from digikey
[22:29:55] <PetefromTn_> Well I gotta hit the sack guys... Gnite.
[22:33:40] <zeeshan|2> must get braking resistor!
[23:16:20] <zeeshan|2> http://i.imgur.com/ID5pTCa.jpg
[23:16:21] <zeeshan|2> hahahah
[23:17:23] <Valen> breaker bar
[23:17:27] <Valen> doin it right
[23:38:04] <XXCoder2> reminds me of lecures by awesome calculus teacher
[23:38:27] <XXCoder2> he talked about his friend using breaker bar with pipe to increase length
[23:38:39] <XXCoder2> huge nut broke off
[23:38:54] <XXCoder2> he then went into math on this, and damn the force number was HUGE.
[23:50:08] <shaun413_> Hi
[23:50:41] <shaun413_> Anyone here into small scale machining?
[23:58:25] <GuShh_Lap2> Anyone with a sherline lathe for sale? got any leads? for shaun413_