#linuxcnc | Logs for 2012-10-13

[01:20:06] <mazafaka> I work in ghetto http://img-fotki.yandex.ru/get/6519/137304751.2/0_9aae8_9635ae3e_orig and these are my bikes: http://img-fotki.yandex.ru/get/6523/137304751.2/0_9aae9_e87c6704_XXXL.jpg
[01:48:02] <mazafaka> Hah, Stark Trial Team 2008, Norco Mountaineer 17'' 2003, Atom Bomber 20xx
[01:49:03] <toastydeath> i've never used a plate roller
[01:49:08] <toastydeath> cool stuff
[02:02:13] <DJ9DJ> moin
[02:08:07] <mazafaka> 'the corner of civil defense' is written on the wall, heh
[02:10:14] <mrsun> hmm i wonder if i should make a indexer plate for the spindle on the mill today
[02:10:20] <mrsun> something ive wanted to do for a long long time
[02:10:28] <mrsun> or whatever its called :P
[02:10:34] <mrsun> so i can read back the rpm
[02:16:18] <mazafaka> toastydeath: the cones they make for pipings are somewhat weird. They bend steel sheets like they want.
[04:16:43] <mazafaka> Would someone of you buy an electro bike like Sero S? http://plugbike.com/wp-content/uploads/2010/05/2010-zero-s-electric-motorcycle.jpg I think I would, I actually plan to do it, maybe after 5 years or so...
[04:50:25] <MattyMatt> mazafaka, I would prefer it to have pedals, for legal & range reasons
[04:50:54] <MattyMatt> I had an ancient one that I was always walking the last mile to work
[04:51:15] <MattyMatt> until the day I was arrested for riding a motorbike
[05:11:13] <awallin> bikes (pedals!) are nice until you have to haul some heavy/large stuff...
[05:12:32] <MattyCNC> depends if there's a hill involved
[05:12:57] <MattyCNC> you can haul 500kg on a dutch bakfiets easy
[05:13:24] <mazafaka> MattyMatt: I meant legal age, otherwise I want a full-driven electro mountain bike
[05:17:08] <MattyMatt> it's not just age. there's tax & insurance issues when you go from a bicycle to a motorbike
[05:17:12] <awallin> then there's the problem of storing the truck-bike...
[05:17:33] <MattyMatt> tarpaulin :) covered wagon
[05:17:42] <MattyMatt> and a "please don't steal" sign
[05:18:20] <MattyMatt> a decent paint job would discourage theft I guess
[05:19:20] <MattyMatt> it's just as easy to store as any other vehicle that can shift 1/2 tn
[05:19:51] <awallin> but the bike is easier to steal on the street...
[05:20:15] <MattyMatt> that's undeniable. my homemade one was stolen
[05:22:19] <MattyMatt> best of all worlds. electric bakfiets with a rottweiler
[05:24:08] <Loetmichel> bakefiets?
[05:24:20] <MattyMatt> for heavy loads, you can tip the whole thing up into a ramp. try doing that with a motor van
[05:25:44] <MattyMatt> http://www.bakfiets-en-meer.nl/wp-content/uploads/2007/09/workcycles-classic-bakfiets.jpg
[05:26:30] <Loetmichel> ah, bakfiets is this? -> http://www.flottbike.de/pool/christiania-light.jpg
[05:26:57] <MattyMatt> yep
[05:27:02] <Loetmichel> i see
[05:27:20] <Loetmichel> hmm, 2 2kw brishless hub motors...
[05:27:27] <Loetmichel> brushless...
[05:27:32] <Loetmichel> a fat battery pack...
[05:27:47] <awallin> they rent those at the re-cycling-center here... for hauling your stuff to/from the re-cycling
[05:27:49] <MattyMatt> yeah electric front wheels would make hills possible
[05:27:59] <Loetmichel> the fiets is already there, my wife has a hip joint athritis, so a nnormal bike isnt for her...
[05:28:22] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=11927
[05:28:36] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=11930
[05:28:41] <MattyMatt> you need good hips for a normal bakfiets
[05:29:01] <MattyMatt> getting started needs a full grown man's weight on one pedal
[05:29:14] <Loetmichel> she can pedal but stand out at the traffic lights
[05:29:32] <Loetmichel> bu NOT
[05:29:33] <Loetmichel> but
[05:29:49] <Loetmichel> that will hurt if its the wrong side
[05:31:22] <MattyMatt> you can make them with half a moped on the back too
[05:32:09] <MattyMatt> presumably with the gearing lowered
[05:33:19] <MattyMatt> I'd prefer the front wheels to be powered I think
[05:33:29] <MattyMatt> 3 wheel drive when you're pedalling too
[05:34:00] * Loetmichel has already ordered some small 2kw brusless model motors including forward/reverse ESCs
[05:34:15] <Loetmichel> and some 4s 5Ah lipo packs
[05:34:31] <Loetmichel> ... just have to make the geardown and clutch ;-)
[05:34:40] <Loetmichel> when they arrive
[05:34:49] <MattyMatt> are they for the wife's trike?
[05:35:19] <Loetmichel> jyeah, for the both back wheels of the trike and for her wheelchair
[05:36:11] <MattyMatt> clutch? why do you need that? you can freewheel and regenerate with a BL motor can't you?
[05:36:19] <Loetmichel> i know, 4kw is a bit much but the model motors are not meant for more than 5 minutes at full power, so i thought i get some slightly bigger ones and throttle tehem
[05:38:04] <Loetmichel> MattyMatt: because she needs a reverse drive AND the brushelss motors have a relatively high "rastmoment" i.e.: they "click" to much to be left engaged if pedaling only
[05:38:31] <Loetmichel> clutch as in : some means of disengaging them completely when pedaling
[05:38:47] <MattyMatt> that must be a limitation of the ESC design
[05:39:48] <Loetmichel> MattyMatt: no, a limotation of the motor construction
[05:39:55] <Loetmichel> too stromg magnets
[05:40:16] <MattyMatt> ah right yeah, like a new stepper
[05:41:04] <MattyMatt> I got 8 used steppers on ebay all the same. 7 were "coggy" but one was totally smooth, but it works just as well as the others
[05:41:55] <Loetmichel> MattyMatt: depends on the motor construction: if you have a hybrid stepper you will have less to none cogging
[05:42:15] <Loetmichel> because a hybird stepper usses the stator field to generate the rotor field
[05:42:31] <Loetmichel> i.e: unpowered there is no magnetic filed in the motor
[05:42:31] <MattyMatt> these were all identical construction. I'm assuming the magnets in the smooth one have been baked
[05:42:40] <Loetmichel> pissible, too
[05:42:44] <Loetmichel> possible
[05:42:45] <archivist> hmm project on fleabay but over priced 160896668455
[05:51:04] <MattyMatt> rain damage looks bad. rust on top of chuck suggests they didn't even close the door
[05:52:12] <MattyMatt> oh no, it's surface rust all round, on 2nd look
[05:57:03] <MattyMatt> yeah that'd do me for if it worked and had a barfeeder and I had 3 phase and a barn
[05:57:11] <MattyMatt> and I had £2k
[05:59:13] <MattyMatt> for making delrin toothed pulleys (as I do) I might get away with an MDF one for a while, but I'm resisting the urge to make that
[06:00:02] <MattyMatt> I'll keep drawing my plans and do it properly in metal or epoxy-granite
[06:11:32] <MattyMatt> slantbed with turret on 240V with no pneumatics
[06:12:03] <MattyMatt> will a solenoid for the dog clutch on the turret be futile?
[06:14:29] <archivist> yes/no/maybe/depends
[06:15:16] <MattyMatt> I could try and arrange for the turning motor to do the clamping
[06:16:30] <MattyMatt> ah build first, criticise later. design while hacking the docs.
[06:16:34] <archivist> some dogs are tapered to remove play and withdrawal could be hard
[06:17:01] <MattyMatt> yeah the ones I've seen are all tapered
[06:18:21] <MattyMatt> a single dog on a high geared leadscrew might work
[06:18:57] <MattyMatt> for my modest needs
[06:20:10] <archivist> or do the crap up against a ratchet tooth that is used on a denford orac and similar
[06:21:10] <archivist> they back turn the rotating motor after the index rotation
[06:22:11] <MattyMatt> ah well it's all vapour. gotta do it on this for now http://i.imgur.com/SkXmd.jpg
[06:22:15] <jthornton> for common metric drills are the smallest increment 0.1mm? ie 1.1, 1.2, 1.3 etc.
[06:22:48] <MattyMatt> archivist yeah that sounds like what I was thinking. turret only rotates one way, so the opposite way clamps
[06:23:20] <MattyMatt> jthornton yeah that's the finest I've seen
[06:23:29] <jthornton> ok thanks
[06:23:58] <jthornton> I'm working on a tap drill selection tool and if I get time I want to add metric to it
[06:24:36] <jthornton> you pick a tap and it shows what drills are within 50% to 90% thread for that tap
[06:33:11] <Loetmichel> hmmm
[06:34:23] <Loetmichel> just experienced it again: anyone has a suggestion why my linuxCNC seems to restart (not reboot, maybe only the x is restarting) if left alone sitting there for a while?
[06:34:29] <awallin> jthornton: I thought for each tap there's only one right drill?
[06:34:41] <spiderdijon> hi, i'm trying to add backlash compensation to my machine and i've added the correct lines in the ini and it is taking effect. It seems to work at low speeds - I see the axis move quickly very briefly before moving at the correct speed. At high speeds it pushes my machine past it's speed limit and the axis stalls. Is there anything it can do to limit the backlash comp speed?
[06:34:53] <Loetmichel> just came back from a smoke, looking at a gnome login prompt
[06:35:10] <Loetmichel> after login there was a naked desktop like after cold boot.
[06:35:22] <Loetmichel> but i left the machine with LinuxCNC open
[06:35:56] <Loetmichel> ?!?
[06:36:42] <jthornton> awallin, no it depends on the material and the depth of the hole
[06:36:48] <spiderdijon> Loetmichel: check the syslog I suppose - may have clues
[06:36:51] <MattyMatt> awallin I find it varies with material. in plastic I'll go for 100% thread depth (2mm for m3x0.5)
[06:37:12] <jthornton> for example for thin metal you go for 90% for deep in steel 50%
[06:37:32] <jthornton> and what MattyMatt said
[06:37:53] <jthornton> Spide
[06:38:08] <MattyMatt> grubscrews in plastic need all the thread you can get
[06:38:10] <jthornton> spiderdijon, did you read the manual on setting up backlash?
[06:38:45] <jthornton> I better up that to 100% for plastic
[06:39:34] <MattyMatt> yeah the plastic deforms while you're tapping, so the end result is slightly undersized and snug
[06:39:45] <awallin> so 100% means the tap has to remove all the material of the actual thread?
[06:39:56] <MattyMatt> yep
[06:40:21] <awallin> doesn't that mean a 50% drill in steel will make for a loose thread? i.e. the i.d. if the hole is too large?
[06:40:43] <archivist> tapping drill also depends on tap type as a thread forming tap needs a larger hole
[06:40:44] <MattyMatt> potentially yes, but that's how they all are
[06:41:27] <archivist> a forming tap will upset the metal to make a smaller hole
[06:41:37] <awallin> so in plastic the M3 thread groove is actually 0.5mm deep, but in steel it would be only 0.25mm?
[06:42:21] <jthornton> http://www.osgtool.com/Technical.asp?tid=1&id=1
[06:43:15] <MattyMatt> so a forming tap partially "rolls" the thread?
[06:44:48] <archivist> http://aluminium.matter.org.uk/content/html/eng/default.asp?catid=131&pageid=2144416380
[06:46:14] <archivist> better http://en.wikipedia.org/wiki/Threading_%28manufacturing%29#Thread_forming_and_rolling
[06:47:33] <jthornton> we used planetary thread rolling machines to make pallet nails
[06:48:55] <Loetmichel> spiderdijon: does that ring a bell? -> http://nopaste.info/9594a61f73.html
[06:49:40] <Loetmichel> it ONLY happens wehen the machine is left alone wit linuxcnc active for a while.
[06:51:00] <Loetmichel> anyone who is willing to help: read the syslog-part also, please
[06:51:41] <spiderdijon> hmm potentially GPU power saving issues? have you got a card you could plug in instead of using the integrated gfx?
[06:52:20] <Loetmichel> spiderdijon: onboard graphics . its a industrial mainboard
[06:52:41] <Loetmichel> (KT965/flex from kotron)
[06:53:11] <jthornton> that must be a hardware issue as I leave LinuxCNC active on my CHNC for weeks at a time
[06:53:15] <spiderdijon> jthornton: I found a few lines about backlash - about setting max acc for various things - is that what you mean?
[06:53:19] <Loetmichel> an no, no room for a graphics board.
[06:53:34] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=12250
[06:53:39] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=12265
[06:53:48] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=12569
[06:53:50] <jthornton> spiderdijon, yes
[06:53:54] <Loetmichel> you see?
[06:55:21] <spiderdijon> I see, well it was quite brief but are you saying adjusting those values can limit the speed?
[06:55:28] <jthornton> spiderdijon, you might have to lower your max acceleration if your right on the bleeding edge
[06:55:36] <spiderdijon> ok thanks
[06:56:03] <spiderdijon> yeah my machine can only do 10ipm :(
[06:56:04] <jthornton> iirc the stepgen max acc must be higher than the axis or something like that
[06:57:14] <spiderdijon> Loetmichel: Search for that syslog error see if there are any fixes
[06:57:31] <spiderdijon> jthornton: I'll take a look, thanks
[07:18:58] <mazafaka> what do you think of 2.5-4 mm height of cutting in milling?
[07:20:04] <mazafaka> This way, I can sharpen the mill bit easily when it is needed and besides, coolant I know the coolant is where it needs to be.
[07:21:09] <mazafaka> I write regimes for low-speed cutting when engineers record the time, and for regular work, when it's 3-6 times more fast.
[08:54:37] <ReadError> hey
[08:54:50] <ReadError> is there a way i can verify my backlash compensation is on in the gui?
[08:58:53] <Tom_itx> it's in the ini?
[08:59:01] <Tom_itx> measure it
[09:16:22] <ReadError> Tom_itx: yea its in there
[09:16:37] <ReadError> but i just wanted to confirm since somehow it got removed before
[09:16:42] <ReadError> (i didnt touch the stepconf either)
[09:19:49] <mazafaka> MAchine I use is unequally rigid in X and Y directions, I know it trying to mill off the tens of millimeter from thikness like 50 mm...
[10:29:32] <ReadError> https://vimeo.com/51331373
[10:29:36] <ReadError> made a little vidjah
[11:08:46] <mazafaka> I'll take video of what I do, hardening-capable steel plates for various constructions these days.
[11:10:16] <ReadError> thats not applicable to what im doing
[11:13:04] <mazafaka> what?
[11:13:13] <mrsun> hmm, pneumatic cylinder rods what steel are they usaly made of? :)
[11:13:35] <mazafaka> plungers or pistons are made of...
[11:14:13] <mazafaka> Of some steel with 0.40% of carbon and 0.1% of crome maybe...
[11:14:24] <mrsun> heh :P
[11:14:59] <mrsun> was thinking if it was anything usefull, got a kinked air cylinder that im going to dissasemble and see what could be usefull in it
[11:15:08] <mrsun> ofc i might just shorten it
[11:15:14] <mrsun> to under the damage
[11:15:30] <mrsun> still would be a good air cylinder only a fair bit shorter :P
[11:15:39] <mazafaka> be carreful to your health
[11:17:35] <mazafaka> using high pressure with air is wrong, low pressure with hydraulics is what you need. Pneumatic stuff uncorporates huge pressure which in case if something goes wrong destroys everything while any liquid just starts to leake therbey dramaticalle reducing the pressure
[11:18:40] <mazafaka> For example, they pressurize the welded construction with hydraulics, when they used air it was like a bomb. Once, the cap had flied away and killed a man
[11:19:56] <mazafaka> I mean, to produce force, air is hardly pressed, and liquid is only pressed up a little bit, and leaks away through the holes and cracks
[11:21:37] <mazafaka> ... while air continues to finally destroy the construction while its pressure reduces. Remember how much time does it takes to flat an off-road tyre. liquid under the same pressure would just flow away in a part of the second.
[11:23:58] <mrsun> hmm, wait .. this is a piston like a hydraulic cylinder not a preasure tank
[11:23:59] <mazafaka> My writes suu much... My do not remember the prooper words... My is just a foreigner... No one wants to answer to my...
[11:24:28] <mazafaka> whatever, mrsun be careful with springs or so in such thingies
[11:26:30] <pcw_home> pneumatics normally use only up to 150 PSI or so, 3000 PSI is common for hydraulics
[11:59:53] <IchGuckLive> hi all
[12:00:16] <IchGuckLive> Loetmichel: ?
[12:07:56] <DJ9DJ> hu
[12:09:27] <IchGuckLive> B)
[12:37:06] <mazafaka> https://www.youtube.com/watch?v=ZrxpyZlA6qw
[13:07:35] <r00t4rd3d> Shit Stations:
[13:07:35] <r00t4rd3d> http://imgur.com/a/wBsn8
[13:09:37] <awallin> r00t4rd3d: cmon what has that got do with linuxcnc?
[13:12:08] <r00t4rd3d> computers
[13:13:23] <r00t4rd3d> makes my shop setup look clean
[13:13:53] <r00t4rd3d> i learned keyboards can withstand mass amounts of cigarette ashes
[13:14:23] <r00t4rd3d> i worry about the saw dust sometimes
[13:15:11] <r00t4rd3d> also when programming a good laugh and break from time to time is good for you.
[13:23:33] <r00t4rd3d> and your last comments had nothing to do with linuxcnc either
[13:25:02] <r00t4rd3d> so next time you want to call someone out, check yourself first.
[13:49:51] <mrsun> so fantasticly brittle hss can be if you get it wrong
[13:50:05] <mrsun> just pulverized a center drill .. for no aparent reason
[13:53:36] <Loetmichel> r00t4rd3d: an i thought MY place was messy...
[14:03:48] <mrsun> looks like my exes old apartment :P
[14:31:21] <Tecan> STOP!
[14:31:24] <Tecan> hammer time
[14:31:32] <DaViruz_> where's my hammer?
[14:32:43] <pcw_home> If I had a hammer...
[14:34:21] <mazafaka> pcw_home: would you get a tough job instead of being an 'electric geek' guy?
[14:35:15] <pcw_home> well I could hammer in the morning anyway
[14:37:21] <mazafaka> What a dream... Could be a nice dream, but girls, girls, girls... No chance for a hammer...
[14:39:07] <Tecan> lol anyway anyhow
[14:39:23] <mazafaka> If only a hammer and several chubby tacks... could be tempting...
[14:40:52] <mazafaka> Or maybe a car and a chick. IT chick with hammer maybe. In my ideal own workshop.
[15:00:32] <skunkworks__> pcw_home: is there a resolver interface that works with the 5i25?
[15:02:46] <pcw_home> Not ATM but I have one planned
[15:10:21] <skunkworks__> ok
[16:01:09] <DJ9DJ> gn8
[18:51:44] <tjb1> Evening gents
[19:48:00] <tjb1> Is there a wildcard I can use in gedit to remove N numbers?
[19:48:14] <tjb1> Like Find N**** and replace with " "
[19:48:18] <FinboySlick> tjb1: Would be better with vi.
[19:48:39] <FinboySlick> :%s/^N....//
[19:49:06] <FinboySlick> tjb1: I can guide you through it if you're feeling adventurous.
[19:50:48] <tjb1> Not that adventurous tonight
[19:50:53] <tjb1> Was hoping the **** would work :(
[19:52:36] <FinboySlick> Is N the first character of the line?
[19:52:42] <FinboySlick> (always)
[19:52:44] <tjb1> Yes
[19:52:58] <tjb1> Ill eventually edit the post so I dont have to do this
[19:53:19] <FinboySlick> Then the separator is a space or a tab?
[19:53:37] <tjb1> Just N0010, N0020, etc...
[19:53:51] <FinboySlick> I mean for the rest of the line.
[19:54:10] <FinboySlick> N0010 G0 X0.5
[19:54:24] <FinboySlick> Space between your N word and your command?
[19:54:26] <tjb1> space
[19:54:29] <FinboySlick> OK.
[19:54:53] <FinboySlick> sed -e's/^N.... //' badfile.nc > goodfile.nc
[19:55:44] <tjb1> And where do I do this?
[19:55:55] <tjb1> terminal?
[19:55:59] <FinboySlick> Yes.
[19:56:38] <tjb1> What is //'badfile.nc?
[19:56:44] <tjb1> Can I just drag the file name or is //' separate
[19:57:38] <FinboySlick> sed is sort of a text-editor robot. -e's/^N.... //' basically tells it to do a search and replace. badfile.nc is your input filename.
[19:58:08] <FinboySlick> Default is to dump the output to the screen. You can use > somefile.nc to redirect that output to a file.
[19:58:19] <FinboySlick> If you just want to test, omit the > goodfile.nc part.
[19:59:17] <FinboySlick> If you saved your file to the desktop, launch a terminal.
[19:59:22] <FinboySlick> cd Desktop
[19:59:31] <FinboySlick> then run the command.
[19:59:42] <tjb1> amazing, thank you
[20:00:05] <FinboySlick> tjb1: You can just type the first few characters of your filename and hit tab for completion.
[20:04:24] <tjb1> Tiem to make my first part :D
[20:11:47] <tjb1> Forgot to edit back in probing sequence…Z doesnt stop lol
[20:47:45] <tjb1> tweaking is being a pita
[21:07:26] <r00t4rd3d> pita pocket?
[21:21:05] <Tom_itx> tweaking what?
[21:21:17] <tjb1> Settings...
[21:21:27] <tjb1> The accel and stuff were too high so it was being jerky
[21:21:32] <tjb1> Here is first part :) - http://www.youtube.com/watch?v=BhL17PuXEGw
[21:21:56] <tjb1> And this is where more tweaking needs done - http://sphotos-a.xx.fbcdn.net/hphotos-snc7/389481_4444718432061_2133760431_n.jpg
[21:23:27] <FinboySlick> tjb1: Why are all the other related videos about pro wrestling? ;)
[21:23:36] <tjb1> no idea
[21:23:46] <Tom_itx> mine aren't
[21:23:48] <tjb1> Not related to pro wrestling on mine ;)
[21:24:19] <Tom_itx> so adjust your backlash comp
[21:24:26] <tjb1> Its the lead in
[21:24:41] <tjb1> I had an arc lead in but I think I am going to try tangent
[21:25:12] <Tom_itx> ready to set up your home button?
[21:25:46] <FinboySlick> tjb1: I'm not very familiar with plasma tables but I'm trying to understand why you need that kind of floating portion on Z? Shouldn't you just barely touch, register contact and go to set height?
[21:26:13] <tjb1> What am I going to register contact with?
[21:26:34] <tjb1> You can use an ohmic sense which senses the tip contact with material but I dont trust it with material like I just run
[21:26:47] <tjb1> The plasma itself had a hard time starting on the first hole it was so rusty
[21:26:53] <FinboySlick> I meant the amount of travel you need to get the contact.
[21:27:04] <tjb1> I mounted the switch bracket too high
[21:27:19] <tjb1> Im going to add a screw to get that down to like .1"
[21:28:07] <FinboySlick> OK. Is there a situation where that much travel is useful though?
[21:28:34] <tjb1> Not on the floating Z
[21:29:19] <tjb1> I was in a rush to get that plate done and just put the bracket where I thought it would work because I didnt have the sensor with me either…it works but it takes a little while
[21:29:44] <tjb1> Torchmate(the company itself) uses ohmic but they are using brand new steel all the time so its no problem for them
[21:30:26] <FinboySlick> OK. It wasn't really a critique on the design, just a way to understand things better.
[21:30:57] <tjb1> Just working with what I had too :)
[21:31:10] <tjb1> Those slides were initially for a plate marker but they dont have enough travel
[21:32:34] <tjb1> Anyone know what a tangent lead in on the inside of a hole looks like?
[21:33:05] <Tom_itx> starts in the middle and goes to the start of the arc
[21:33:11] <Tom_itx> i do those on mill cuts
[21:33:30] <tjb1> Any idea what would work best to eliminate the oblong holes?
[21:33:48] <Tom_itx> backlash comp?
[21:33:53] <ReadError> tjb1, does the school pay for it?
[21:33:58] <ReadError> or you gotta fund everything yourself?
[21:34:03] <tjb1> Its all mine
[21:34:24] <Tom_itx> did you measure backlash?
[21:34:28] <tjb1> Tom_itx: There is no backlash in it, its spring loaded rack and pinion
[21:34:56] <Tom_itx> jt would be the one to ask about plasma
[21:35:04] <ReadError> tjb1, how much you estimate the project is?
[21:35:13] <tjb1> Once I get water table, around 3k
[21:35:21] <ReadError> oh thats not bad
[21:35:32] <Tom_itx> what sort of power source on the cutter?
[21:35:48] <tjb1> What the cutter plugs into?
[21:36:01] <Tom_itx> i don't know much about em
[21:36:08] <tjb1> Its just 240v
[21:36:25] <Tom_itx> no transformer?
[21:36:28] <ReadError> why are all these larger mills low rpm motors :(
[21:36:31] <tjb1> inverter
[21:36:33] <ReadError> i might need a routing table
[21:36:42] <Tom_itx> tjb1, ac or dc?
[21:36:42] <ReadError> i need to do atleast 10k rpm
[21:36:45] <ReadError> maybe even higher
[21:37:35] <tjb1> dc
[21:37:52] <tjb1> Tom_itx: http://www.hypertherm.com/en/Products/Handheld_cutting/Systems/powermax45.jsp#specs
[21:38:15] <tjb1> I need to find which way to cut circles too because of the swirl cup
[21:40:27] <Tom_itx> so you bought a manual one and made the table
[21:41:19] <tjb1> yes
[21:42:02] <Tom_itx> are you using their feed recomendations?
[21:42:50] <tjb1> Yep
[21:43:06] <tjb1> Reading up on some of jims post, holes need cut CCW, long lead in, no lead out
[21:43:11] <tjb1> 60% of normal feed
[21:44:44] <tjb1> I found out why home was never setting coordinates to 0…I needed to add g92.1 to every program that uses the torch height index or it screws it all up
[21:56:29] <tjb1> Tom_itx: Is there a g-code to rotate work?
[21:57:01] <Tom_itx> umm, not that i'm aware of
[21:57:12] <Tom_itx> there may be but not one i've used much if ever
[21:58:31] <Tom_itx> what do you mean?
[21:58:37] <Tom_itx> change the x and y axis?
[22:00:08] <tjb1> Sorry found it, G10 L2
[22:00:33] <Tom_itx> that doesn't rotate it though
[22:01:08] <tjb1> It has R - Rotation about the Z axis
[22:02:04] <Tom_itx> maybe for a lathe
[22:02:34] <Tom_itx> i dunno
[22:02:52] <tjb1> It did rotate it but now I cant figure out the 0
[22:02:59] <Tom_itx> heh
[22:03:29] <Tom_itx> it would be what you had the P word set to
[22:03:45] <Tom_itx> 1 would be the G54 offset values
[22:03:49] <Tom_itx> 2 would be G55
[22:03:50] <Tom_itx> etc
[22:03:57] <tjb1> Not 0?
[22:04:03] <Tom_itx> not active
[22:04:06] <tjb1> 0 says active…maybe I need to change it to 1
[22:04:10] <Tom_itx> http://www.linuxcnc.org/docs/html/gcode/gcode.html#_g10_l2_set_coordinate_system_a_id_sec_g10_l2_a
[22:04:44] <Tom_itx> i dunno without testing it
[22:04:58] <Tom_itx> maybe 0 is the currently active fixture offset
[22:04:58] <tjb1> Screw it, Ill redraw it lol
[22:05:04] <Tom_itx> naw, figure it out
[22:05:20] <Tom_itx> it's how we learn
[22:05:25] <tjb1> Well I figured out how to rotate it in sheetcam
[22:09:50] <Tom_itx> is that free to use?
[22:10:02] <tjb1> I think for 180 lines
[22:10:05] <Tom_itx> k
[22:10:07] <tjb1> I rotated it and its still screwd up...
[22:10:11] <Tom_itx> i was thinking someone said it was
[22:10:19] <Tom_itx> what's wrong with it?
[22:10:28] <tjb1> Its moving in y versus x
[22:11:01] <Tom_itx> what exactly are you trying to do?
[22:11:08] <tjb1> Ok I have a problem…the G code is moving in X direction but the machine is doing it in the Y direction
[22:11:13] <Tom_itx> did you reload the gcode?
[22:11:18] <tjb1> Yes
[22:11:25] <tjb1> I just restarted axis, hold on
[22:11:38] <Tom_itx> X is axis0
[22:11:42] <Tom_itx> y is axis1
[22:11:53] <Tom_itx> normally
[22:13:12] <tjb1> restarted linux cnc and now its going the correct way...
[22:13:32] <tjb1> These offsets are killing me, especially using the G92
[22:14:51] <Tom_itx> what's it doing and what are you trying to accomplish?
[22:15:29] <Tom_itx> i use G54 normally
[22:15:34] <tjb1> I think a code was still active before…specifically the G10 L2 and it kept going it the wrong direction
[22:15:49] <tjb1> I need to make a good startup line to cancel everything
[22:15:57] <Tom_itx> hang on
[22:16:31] <Tom_itx> http://tom-itx.dyndns.org:81/~webpage/cnc/cnc_files/enc_hub.txt
[22:16:32] <Tom_itx> that's a sample of my post
[22:17:05] <tjb1> I am using G92 to set the torch height though
[22:17:30] <tjb1> and if not cancelled it screws everything up at least on the read out, but since every probe resets it, it cant really harm the toolpath
[22:18:13] <tjb1> Every time I start linuxcnc and home it, it never sets the coordinates to 0 and I havent tested it yet to see if the soft limits are working off the coordinates it sets or if it is physically setting that point to 0 and just displaying something funny?
[22:18:27] <tjb1> I have to go into Machine and reset G54 coordinates
[22:19:10] <Tom_itx> why do you need G92 for the torch?
[22:19:27] <tjb1> It sets the height when the input is activated
[22:21:50] <tjb1> My torch lowers until input actiavted, does an incremental move the distance from floating until input activate, G92 Z0.0, G1 z.160, m3s1, waits for torch ok, z.060
[22:28:48] <jdh> why g92 instead of just set z in g54 (g10 l2 p1 z0)?
[22:30:38] <tjb1> Im just using jts code
[22:30:49] <jdh> should work then.
[22:31:24] <jdh> I tried g92 a few times. Or I tried to try it anyway. It never did what I expected the second time.
[22:32:29] <jdh> what would be the smallest plasma table that would be useful?
[22:32:53] <tjb1> Whatever you work with
[22:33:25] <jdh> I don't work with anything, it just looks cool
[22:33:48] <jdh> does the kerf change size from top to bottom on thicker material?
[22:34:18] <tjb1> yes
[22:34:42] <jdh> can you angle the torch head to get a square through cut?
[22:35:04] <jdh> on one side anyway
[22:35:38] <tjb1> I suppose if you wanted to lol
[22:36:41] <Tom_itx> jdh, rotary head?
[22:38:54] <jdh> it would need to me more than just rotary
[22:39:06] <jdh> guess if you cared about precision that much, you wouldn't use a plasma cutter
[22:39:12] <Tom_itx> heh
[22:39:15] <Tom_itx> i suppose
[22:40:05] <jdh> but, with the torch in a ball joint or something and coordinated movement, you should be able to keep the plasma path perpendicular to the finished side
[22:40:26] <tjb1> If you need that good of a cut you should be using a high def plasma
[22:40:37] <jdh> or wire edm
[22:40:51] <tjb1> sheetcam needs an option to overlap leadin-leadout a certain amount...
[22:45:06] <r00t4rd3d> with Aspire you can.
[22:45:37] <r00t4rd3d> you probably can with shitcam too
[22:45:43] <tjb1> Might be using that for plasma...
[22:45:48] <r00t4rd3d> you just need to figure out how
[22:46:00] <tjb1> Problem is its leading in/out at the same point so its not cutting that area at full plasma width
[22:46:08] <tjb1> No I looked it up and they dont have it yet
[22:46:26] <tjb1> Well that post was 2 years ago so maybe the windows version has it
[22:46:35] <r00t4rd3d> over lap the vectors in your design
[22:46:41] <r00t4rd3d> by a touch
[22:46:47] <tjb1> You cant pick stuff like that in sheetcam
[22:47:04] <tjb1> you put all holes on a layer and set toolpath to inside offset and it does it
[22:47:15] <tjb1> It doesnt even use cutter comp…it offsets the toolpath
[22:47:43] <tjb1> Piss poor options I think but I guess it is cheap
[22:48:10] <tjb1> r00t4rd3d: Can you post code of one hole for me with overlap lead in/lead out arcs?
[22:49:30] <r00t4rd3d> probably not
[22:49:48] <tjb1> :(
[22:51:26] <r00t4rd3d> how big a hole?
[22:52:09] <tjb1> https://dl.dropbox.com/u/3090951/1hole.dwg
[22:52:22] <tjb1> or .304 if you wanna do it yourself
[22:52:29] <tjb1> .050 cutter width
[22:54:24] <tjb1> Do like .125 overlap on the leads if you can please
[22:55:35] <r00t4rd3d> https://anonfiles.com/file/c123e422eaf23a4b3a01d9604cc0d871
[22:55:40] <r00t4rd3d> see how that looks in linuxcnc
[22:56:07] <r00t4rd3d> not sure if i did it right
[22:57:21] <tjb1> thanks ill let you know in a second
[23:01:16] <r00t4rd3d> i have straight line lead, circular lead , lead lenght, Do lead out, overcut distance
[23:01:30] <Tom_itx> why are you using an arc leadin?
[23:01:50] <tjb1> circular, with lead out and .125 overcut
[23:01:58] <r00t4rd3d> what should the radius of the circular lead be?
[23:02:23] <tjb1> .125 if you can
[23:02:53] <tjb1> Ill generate some at school on mastercam with a bunch of different leads if I remember
[23:06:45] <r00t4rd3d> https://anonfiles.com/file/773e9df823bc9bf6977d1df99f2e4d73
[23:07:22] <tjb1> thanks
[23:07:27] <tjb1> better be a circle this time :P
[23:07:37] <r00t4rd3d> lol
[23:07:42] <r00t4rd3d> you should cut that
[23:08:11] <tjb1> Oh did you go counter clockwise?
[23:08:54] <r00t4rd3d> no clue
[23:10:07] <tjb1> Why are there 2 circles?
[23:10:37] <r00t4rd3d> cut depth probably
[23:11:43] <r00t4rd3d> yeah, material was set to .25 , cut depth .125
[23:11:52] <r00t4rd3d> 2 passes
[23:12:22] <tjb1> Does that lead in and out to the center of the circle?
[23:12:55] <r00t4rd3d> ive never used the lead in or out stuff
[23:13:08] <r00t4rd3d> only overcut
[23:13:27] <r00t4rd3d> looks like it just leads in/out to the tool path
[23:14:22] <r00t4rd3d> why do you even use the lead in/out?
[23:15:16] <tjb1> Because it blows a bigger hole than kerf when piercing
[23:15:24] <tjb1> If you start on the profile it screws it up :)
[23:15:34] <r00t4rd3d> also was set ot conventional so clockwise
[23:16:05] <tjb1> The hole on pierce is like .09" big or bigger
[23:17:00] <r00t4rd3d> i need to go out and start another box
[23:17:29] <tjb1> good luck