#linuxcnc | Logs for 2012-05-15

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[00:10:27] <ReadError> http://sale.images.woot.com/Dark_Side_of_Oz_Listening_Party4p6Detail.png
[00:10:31] <ReadError> ordered that today :)
[00:13:39] <Tom_itx> checked all my caps. i think they're good
[00:14:20] <Tom_itx> ok the worst one was 2.99 mF and the best was 3.06 mF and they're all 2200 �F caps
[00:15:07] <PCW> +80-20%
[00:15:12] <PCW> ?
[00:15:29] <Tom_itx> i don't have specs on them
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[00:16:51] <Tom_itx> http://tom-itx.dyndns.org:81/~webpage/cnc/psu2.jpg
[00:17:24] <Tom_itx> only 2 leads are wired
[00:17:28] <Tom_itx> 2 are unused
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[00:18:24] <PCW> So those were PC mount?
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[00:18:40] <Tom_itx> yeah
[00:18:48] <Tom_itx> i had some boards made to hold them
[00:19:02] <Tom_itx> they were also surplus
[00:19:28] <ReadError> Tom_itx: you hosting @ home?
[00:19:35] <Tom_itx> yup
[00:19:44] <Tom_itx> is it slow?
[00:19:47] <ReadError> grab an amazon ec2 :)
[00:19:48] <ReadError> free
[00:20:07] <puff> This may be a bit OT, Idaknow... I'm looking for advice on buying a CNC kit.
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[00:20:37] <ReadError> kit?
[00:20:40] <ReadError> for a mill or router?
[00:20:44] <puff> Router.
[00:20:51] <ReadError> fireball v90 seems nice
[00:21:38] <puff> Basically, I want to get into DIY CNC. I wanted to build my own, but several months have gone by and I hven't gotten thing one done on it. So I figure, get a kit, assemble it, I'll learn something, then later I can build the big job I want to build.
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[00:22:08] <puff> Mainly I want to use it to make furniture.
[00:22:10] <ReadError> look in to makerslide
[00:22:37] <ReadError> its basically 80/20 with a V on it
[00:22:53] <puff> 80/20?
[00:23:05] <ReadError> http://www.8020.net/
[00:23:31] <puff> Yoiks, $1334.
[00:23:45] <ReadError> i think its cheaper for just the frame
[00:23:51] <ReadError> then you can outfit your own electronics
[00:24:06] <puff> How deep can it plunge?
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[00:24:13] <puff> Ah, I guess 3".
[00:24:46] <puff> The page is slow to load for me. I blame comcast.
[00:25:25] <puff> Can you explain what "80/20 with a V on it" means?
[00:26:40] <ReadError> http://www.makerslide.com/
[00:26:49] <ReadError> http://www.makerslide.com/images/ms_long.jpg
[00:27:36] <puff> Ah, now that the graphics load, I can see $600 base price. The $1334 is for that set of options.
[00:27:42] <puff> What's your opinion on the options, etc?
[00:28:21] <ReadError> a guy here just got one
[00:28:25] <puff> It seems the default set of options add up to $1334... is it a bad idea not to get those extras? Will it be enough to assemble it and start making stuff, or will I nee
[00:28:25] <ReadError> Thadius
[00:28:28] <ReadError> but hes not on atm...
[00:28:32] <puff> or will I need extra stuff?
[00:28:36] <puff> cool, I will hang around.
[00:28:36] <ReadError> well
[00:28:38] <ReadError> if you get the base
[00:28:46] <ReadError> you need motors, controller, PSU
[00:29:05] <ReadError> some advice, get a modeling app
[00:29:09] <ReadError> and learn that really well ;)
[00:29:15] <ReadError> solidworks or some type of CAD
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[00:29:47] <puff> Hm.
[00:30:27] <puff> I want to balance getting something done at this stage (i.e. not taking another 3 months to decide what kit to buy) vs not throwing my money away.
[00:31:06] <puff> so... I'd like whatever I get to either be somewhat useful, or to be cheap enough I don't mind as much, or to have parts that can be repurposed into a larger/better unit.
[00:32:24] <puff> I like the t-slot stuff, wish it was cheap enough to buy my cousin's kids a set to play with :-).
[00:32:29] <puff> Life sized erector set!
[00:32:46] <ReadError> yup ;)
[00:33:21] <puff> I've been thinking about buying/making 'em a set of life-sized lincoln logs.
[00:35:42] <ReadError> does it come with a crane to lift em ?
[00:37:03] <puff> Hm, so the v90 is a kit and the comet is fully assembled.
[00:37:16] <puff> Well, these are for pre-teens, so not *that* life-sized.
[00:38:14] <puff> When I was six or seven years old, we moved into a house out in the country. The previous owners had a split-rail fence that they dismantled before they sold the house. So we had a stack of these fence rails, about 4" diameter, 8' long.
[00:38:29] <puff> We had great fun building lean-tos, little log cabins, etc, with 'em.
[00:38:35] <puff> I want to give my cousin's kids the same experience.
[00:39:25] <puff> This is the sort of thing I want to build with my CNC: http://www.darksleep.com/puff/woodworking/couch
[00:39:37] <puff> Hand chiseling those 4" mortises was a huge pain.
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[01:24:46] <Gast485> anybody home/
[01:25:15] <Gast485> i have a little problem and i guess I am missing some basic installation knowledge
[01:26:10] <Gast485> I installed an old version many years ago, I think it was 2.2.8. In preperation for changing a lot of stuff with my machine, I started an upgrade to Ubuntu by downloading all 265 fixes.
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[01:26:31] <Gast485> they installed and when I rebooted I got the initramfs error. can't get out of it for nothing.
[01:26:57] <Gast485> so I am trying to just access my config files. if I can get them, I will install the latest without worrying about this old system
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[01:27:33] <Gast485> question: I installed over windows XP. where is the ubuntu file stystem stored?
[01:28:08] <Gast485> for some reason I always thought it was pon a separate partition but it if is, I can't find it. I haven't looked at this in years,
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[01:29:14] <Gast485> I can boot the old live cd, mount all the windows drives, but again, cant find the old filesystem to be able to copy out my config files. any help?
[01:30:22] <Gast485> any pointers?
[01:32:39] <Gast485> question #2, if I reinstall the old ubuntu over the old system, will it reformat the filesystem or just lay on top? The only thing I want are my config files.
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[01:36:36] <Gast485> it looks like wubi uses a virtual disk. is there a way to access it with either windows or the live cd?
[01:40:29] <skunkworks__> I have never tried the wubi install...
[01:42:39] <Gast485> i just found something called ext2read that is supposed to read the root.disk from wubi. don't know how I found it,
[01:43:04] <Gast485> so I assume the root.disk is the virtual disk used by wubi.
[01:43:27] <Gast485> this initramfs error has been a plague from day one.
[01:44:01] <skunkworks__> that is how I understand it... (root.disk)
[01:44:26] <skunkworks__> how complicated is your config? what kind of machine? would it be easier to re-create the config?
[01:50:38] <L84Supper> http://chicago.craigslist.org/nwc/tls/3004922246.html Surface grinder Boyer Schultz 6-12 - $400
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[01:59:27] <Gast485> I found it. ext2read or ext2explore was able to open the root.disk file. I was able to get to the entire filesystem. downloaded my configs, etc. as well as my modified AXIS
[02:00:50] <Gast485> so is there any way out of this initramfs error? I've shutdown windows cleanly, etc. tried running chkdsk but can't get it to run for some reason.
[02:04:27] <Valen> what exactly is the error?
[02:11:44] -!- arthur92710 [arthur92710!43bdd284@gateway/web/freenode/ip.67.189.210.132] has joined #linuxcnc
[02:12:01] <arthur92710> Hi
[02:12:27] <arthur92710> Im trying to register at http://www.linuxcnc.org/index.php/english/component/comprofiler/registers
[02:12:52] <arthur92710> I filled it out at least 5 times, but I wont let me past that page.
[02:13:48] <arthur92710> Can someone verify that its working? I get no errors or anything when I hit submit.
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[02:21:46] <pcw_home> Not sure how to test without making a new bogus user
[02:25:12] <skunkworks__> arthur92710: what is your username on the forum
[02:25:24] <arthur92710> make an account for me?
[02:25:40] <skunkworks__> no - just trying to see if you are atleast in the systemmm'
[02:25:43] <skunkworks__> system...
[02:25:50] <arthur92710> its arthur92710
[02:27:11] <skunkworks__> don't see it.. what browser are you using?
[02:28:01] <arthur92710> IE9
[02:28:32] <arthur92710> lol, bring on the jokes
[02:28:41] <skunkworks__> heh
[02:32:06] <arthur92710> maybe I can just ask mt question here?
[02:32:56] <skunkworks__> sure
[02:33:05] <skunkworks__> ask away
[02:33:39] <skunkworks__> doing a quick search shows others having problems with joomla and ie9. Could you install firefox or one of the other browsers to try?
[02:33:59] <arthur92710> Sure
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[02:36:24] <arthur92710> Im building a project CNC mill out of printers and scanner. So far so good. I have the machine 80% built. Im using regular DC motors with linear encodes. I have the motors wired to H bridge drivers. Basicly how do I connect the motor driver board to the PC? How do I connect the feedback to the PC? Parallel port?
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[02:39:12] <arthur92710> Ok I just tried FF3.6, same thing
[02:39:15] <skunkworks__> for testing.. you could run pwm out of the printer port and read the encoders back in.. (you will probably need more than 1 port) linuxcnc has software pwm and encoder counter.
[02:40:53] <arthur92710> I am still working on the hardware.Haven't even touched the software. I just want to know if I need any other circuits?
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[02:41:29] <skunkworks__> well - the site admins will usually read back on the irc.
[02:42:22] <arthur92710> Its ok, im not in a rush.
[02:42:58] <skunkworks__> it really depends on how fast you need the pwm and encoder counters. Software wise there will be a limit depending on the computer. it has been done though _ I have (encoder hooked into the printer port - printer port outputing pwm driving a h-bridge.
[02:44:04] <skunkworks__> there is pretty inexpensive interface hardware out there though.. Like mesa. that moves the pwm and encoder counting outside of linuxcnc.
[02:44:50] <arthur92710> I will look into it.
[02:46:44] <skunkworks__> I am doing the pwm here http://www.youtube.com/watch?v=eUmFKOVepYY&feature=plcp
[02:46:48] <jdhNC> <nondem> http://myfriendagain.com/default.htm
[02:46:59] <jdhNC> whack paste
[02:53:10] <djdelorie> irc really needs a "5 second rule", yes? ;-)
[02:55:30] <arthur92710> This is just a small project im working on, so I can sacrifice speed over cost.
[02:57:20] <pcw_home> what resolution are your linear encoders?
[02:57:22] <pcw_home> (that and your PC latency will determine how fast you can move)
[02:58:44] <arthur92710> They are really fine lines
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[02:58:52] <arthur92710> I can try counting
[03:01:40] <arthur92710> Never mind, its really small, maybe 5 lines per mm if not more
[03:02:53] <pcw_home> Thats fairly coarse (that would be 20 counts per mm quadrature)
[03:03:35] <arthur92710> It is, you can barely see the lines.
[03:03:53] <pcw_home> or 20khz counting rate (doable in software) at 1M/sec
[03:05:27] <pcw_home> I'd just wire one up to a parallel port and see what the real resolution is...
[03:06:29] <arthur92710> I will start of with an old hp zv5000 single core, built in parallel port.
[03:07:33] <pcw_home> The processor speed is not much of an issue, the latency is (have you run the latency test?)
[03:07:55] <arthur92710> No I haven't
[03:08:35] <arthur92710> I noticed there is a livecd , does it have the program on it?
[03:08:58] <pcw_home> Thats the first step in selecting a motherboard (yes its on the livecd)
[03:10:17] <Gast485> sorry, back from dinner. I get a stop at boot after an upgrade to ubuntu with the prompt initramfs. Usually it clears up with a clean shutdown of windows. can't get rid of this one. any ideas?
[03:11:13] <arthur92710> Cool, I'll download the cd and try it out. Thanks for the help.
[03:16:51] <Gast485> has anyone been able to get around the initramfs stop after upgrading ubuntu? I saw a bunch of notes from a while back. This system was pretty old when I did the upgrade there were something like 256 pathes
[03:17:05] <Gast485> patches
[03:17:41] <Gast485> in the past, when installed under windows, all I had to do was shutdown windows cleanly and the problem went away. cant get around this one.
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[04:28:41] <Jymmm> JT-Shop: Just placed an order for an assortment of fuses =)
[04:29:15] <Jymmm> JT-Shop: I'd love to have this, but not gonna happen this year... http://www.pyrodirect.com/ecom-prodshow/043-0153.html
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[07:38:19] <DJ9DJ> moin
[07:39:15] <alex4nder> yoh
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[08:33:33] <anonimasu> question how much backslash is acceptable on a cnc lathe?
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[08:34:40] <archivist> are cuts always right to left
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[08:35:45] <anonimasu> no
[08:36:32] <anonimasu> measured about 0.013mm
[08:37:28] <archivist> do you do solid tapping
[08:37:41] <anonimasu> rigid tapping? no
[08:37:50] <anonimasu> not yet..
[08:38:41] <archivist> you could add .013 backlash compensation on the worn axis
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[08:39:10] <anonimasu> the question was really, should i bother chasing it down more?
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[08:40:17] <anonimasu> what's the usual backslash for a new machine?
[08:40:19] <archivist> is it stiction or slide wear
[08:40:52] <anonimasu> ballscrew wear i guess, it's 3�m from factory setting of backslash...
[08:41:37] <mrsun> anonimasu, put oversized balls in ? :)
[08:42:00] <anonimasu> mrsun: i dont know if it's really nescessary..
[08:42:16] <archivist> are parts failing inspection
[08:42:30] <anonimasu> i inspect myself -_-
[08:43:13] <archivist> are you making scrap because of it /me guesses no
[08:43:19] <anonimasu> no
[08:43:48] <anonimasu> but im trying to keep +0 -0.012 on a shaft im going to make soon..
[08:45:01] <anonimasu> so im trying to set up things before i start dia now are +/- a few 0.01mm's.. roughly like the backslash
[08:45:17] <anonimasu> depending on direction of moving
[08:45:25] <archivist> a manual lather with a pile of backlash can still get the accuracy if driven correctly with knowledge of faults
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[08:46:29] <anonimasu> yeah but tweaking offsets for the final pass on every part is a pita
[08:47:20] <archivist> I come from one direction on the mill to size, so dimensions are repeatable
[08:47:52] <archivist> this means I do extra moves in the gcode
[08:48:48] <anonimasu> well, i do the same for my cam output stuff, however when i rapid back to toolchange for the final tool, backslash makes the dia not match up so good,
[08:49:38] <archivist> are you sure you are not taking tool mounting into account as well
[08:50:21] <archivist> also program in a slow move to final dia before the cut so there is no overshoot
[08:54:16] <archivist> I have seen whole slides rotate due to wear, adjust gibs
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[08:55:42] <anonimasu> will check, gtg to cut some parts
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[12:56:49] <awallin> hmh http://blogs.sccs.swarthmore.edu/julianleland/engineering/academic-projects/e90-senior-design-self-replicating-mill/
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[13:38:00] <ScribbleJ> Ineresting.
[13:38:13] <ScribbleJ> It's about as self-replicating as a reprap
[13:38:19] <ScribbleJ> (Which is to say, not at all really)
[13:41:14] <jdhNC> anyone know how small of a PS you can use with an intel d525?
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[13:45:06] <micges> jdhNC: what you mean by small?
[13:45:14] <jdhNC> how many watts
[13:45:31] <Jymmm> <100
[13:45:57] <jdhNC> http://www.mpja.com/150WATT-ATX-COMPUTER-POWER-SUPPLY/productinfo/18034+PS/
[13:46:23] <Jymmm> thats a 20pin
[13:46:33] <jdhNC> A $6 PSU doesn't really inspire confidence though.
[13:46:38] <Jymmm> but it might be fine
[13:46:55] <Jymmm> you could use a pico PS too Ibelieve
[13:48:35] <micges> jdhNC: it will work with 90W
[13:49:05] <micges> picoPSU 90W
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[13:50:18] <jdhNC> thanks.
[13:51:57] <Jymmm> jdhNC: Check craigslist free section, always free computers available
[13:52:31] <Jymmm> jdhNC: Else, place a WANTED add for free computer
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[15:35:06] <Jymmm> Has anyone used something like this before? http://www.harborfreight.com/pack-of-8-alumiweld-aluminum-welding-rods-44810.html Here's a (cheesy) video... http://www.youtube.com/watch?v=CJ42scaWFnw&feature=related
[15:35:55] <syyl> that aluminum welding/soldering stuff always works great in the videos or on trade shows
[15:36:14] <syyl> but in reallife its just annoying ;)
[15:37:30] <syyl> get a AC tig ;)
[15:37:33] <Jymmm> Since I only solder wires, and it looked 'okey' with a propane torch, thought it might be interesting to try out.
[15:38:09] <syyl> you have to break the oxide layer to solder/weld it
[15:38:20] <Jymmm> Like I said, the video is cheesy, but it does show the clueless approach
[15:38:23] <syyl> in the video its done by scratching with the welding rod
[15:38:35] <syyl> you will get problems doing that to a wire
[15:39:04] <Jymmm> I'm only considering 1/16 to 1/8" thick aluminum
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[15:41:32] <ReadError> i cant see it being very strong
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[15:44:43] <Connor> I've seen a non promotional video of a guy using that stuff.. He doesn't sell it.. but, he knew how to use and.. and it looked great.. and looked like it worked very good.
[15:49:46] <ReadError> they test the strength of it?
[15:50:26] <Connor> Don't remember.. been a year or two ago since I saw it.
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[15:58:45] <archivist> was given a welded just done at a show and pliers to break it, the weld held, metal broke
[16:00:00] <ReadError> so maybe they used crappy metal ;)
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[16:02:39] <archivist> very thin ally
[16:03:59] <archivist> and as I was an employed aluminium welder many years ago, seemed ok except for the silly price
[16:05:51] <jdhNC> I had a guy weld an aluminun T-Top for my boat, he did beautiful Al welds
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[17:09:26] <IchGuckLive> good eveningt to all from germany
[17:09:56] <IchGuckLive> PCW hi order is out
[17:11:51] <IchGuckLive> pcw_home: is there a info inside on how to get it work 5i25 plug N go 7i76
[17:20:16] <jthornton> IchGuckLive, what info are you needing for the 7i76?
[17:22:51] <jthornton> be back later
[17:26:14] <micges> IchGuckLive: what info do you need?
[17:27:14] <IchGuckLive> im just asking and waiting for the packet to arive
[17:28:28] <micges> ok
[17:28:42] <andypugh> No instructions in the pack, but the manuals are downloadable from mesanet.com
[17:28:59] <IchGuckLive> there seams to be no config in the git at hm2
[17:29:43] <andypugh> It isn't as "plug n go" as it says, you need the correct HAL config and a manual to work out which terminal is which
[17:30:20] <andypugh> There is no .bit file, because the 5i25 doesn't use them.
[17:30:23] <IchGuckLive> i will get over this
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[17:35:14] <IchGuckLive> andypugh: so if i get the packet hostmot firmware wit synatic everything is inside
[17:36:11] <andypugh> No, you don't need any of that
[17:36:25] <andypugh> All you need is LinuxCNC
[17:36:40] <andypugh> (needs to be V2.5)
[17:36:58] <IchGuckLive> i pull the latest git
[17:37:17] <andypugh> Latest released version is fine.
[17:37:33] <IchGuckLive> i want foam and grid inside
[17:37:43] <IchGuckLive> shoudt be on master then
[17:37:58] <andypugh> No, master is fine too.
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[17:39:51] <andypugh> Aha! And v2.5 seems to include 5i25 support in pncconf, so it's all easy
[17:40:11] <Loetmichel> soo, re @ home, now: speedmanufacturing of wooden trophy bases ;-) (28 pcs.) -> http://bambuser.com/v/2647989
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[17:45:11] <IchGuckLive> andypugh: does the pci 5i25 give me the %V to the 7i76 without hooking a seperate 5V
[17:45:23] <IchGuckLive> to any of them
[17:45:33] <IchGuckLive> so by pc power
[17:45:37] <pcw_home> you can also just take the hm2-stepper config and make a new ini file for it
[17:45:53] <andypugh> I _think_ you need 8-32V for the field-IO, as it is isolated from the PC power.
[17:46:33] <IchGuckLive> i got 5V 12V 24V and 48V inside the stepper driver case
[17:46:59] <pcw_home> You do not need a separate 5V supply, it can come from the 5I25 but the 48 I/O bits need their own supply
[17:47:21] <pcw_home> 12 or 24V recommended
[17:47:49] <IchGuckLive> 12V is good then the I/O supply that ? to the driver stage
[17:48:15] <IchGuckLive> so i need resistors to the optocopplers TTL 5V
[17:48:43] <andypugh> IchGuckLive: If you want to use Pncconf then I think you need these files: http://www.linuxcnc.org/index.php/english/component/kunena/?func=view&catid=39&id=20043
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[17:49:06] <andypugh> IchGuckLive: You shouldn't need any extra optocouplers I don't think.
[17:49:33] <IchGuckLive> ther are on the driverstages M542 already
[17:50:02] <pcw_home> This is for the isolated I/O section for the 16 outputs and 32 inputs (for control outputs and limits/home/control inputs)
[17:50:04] <pcw_home> The step/dir outputs are 5V signals
[17:52:07] <IchGuckLive> ah ok thats good so just connect is there a 5V out on the card 7i76 to connect to the optocoppler V+ of the driverstage and only gnd to the portpin of the 7i76
[17:53:17] <IchGuckLive> i see there is -/+ for eatch
[17:53:26] <pcw_home> if the driver leaves the OPTO inputs uncommited (not commoned in any way)
[17:53:28] <pcw_home> you can drive them differentially which is best
[17:54:42] <IchGuckLive> this overcomes my english need to translate and understand the last fires
[17:57:01] <pcw_home> That is if the OPTO inputs on your drive have both + and - for STEP and DIR you can drive them from the + and - 7I76 outputs (this is called differential drive)
[17:57:01] <IchGuckLive> pcw_home: this is the connection chematic http://www.mecheltron.com/files/images/stepper-motor-drivers/M542-schematic.png
[17:57:23] <IchGuckLive> thats it
[17:57:33] <IchGuckLive> there are connectet outside
[17:59:03] <pcw_home> OK so best as far as noise immunity goes it to wire them differentially
[17:59:19] <IchGuckLive> agree
[17:59:26] <pcw_home> s/it to/is to/
[18:06:56] <IchGuckLive> PCWone last question for now on the parport the home switches dident need any power at all sa they short the groud no its 12V wunning thru them ?
[18:07:36] <IchGuckLive> as i only need the inputs
[18:10:23] <IchGuckLive> so as i rees the manual 12V-> Vin vField to the switch P1 P2 inputX
[18:10:51] <pcw_home> the field inputs are NPN type so need to be powered so +12v --> limit sw --> 7I76 input
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[18:11:11] <IchGuckLive> ok
[18:16:27] <pcw_home> The 7I76 /7I77 field I/O was chosen to be the safest (a grounded limit switch wire is a fault)
[18:16:29] <pcw_home> and a grounded output wire does not enable the load. This may be a nuisance for retrofits however if other wiring schemes were used
[18:16:49] <IchGuckLive> anderstand
[18:17:38] <IchGuckLive> [HOSTMOT2] DRIVER=hm2_pci BOARD=5i25 <- so i go with this no config needed i the ini
[18:20:29] <pcw_home> you also need to drop the firmware text in the line that invokes the pci driver
[18:21:55] <IchGuckLive> thats what for the plug N go 5i25 7i76 kit as i need 5 stepdir gens
[18:23:00] <pcw_home> somethin like:
[18:23:02] <pcw_home> CONFIG="num_encoders=1 num_stepgens=5 sserial_port_0=20xxxxxx"
[18:23:48] <IchGuckLive> sserial port as from ls pci ?
[18:24:15] <pcw_home> no, sserial is part of hm2
[18:24:36] <IchGuckLive> what does it the I7O
[18:24:44] <IchGuckLive> I/O
[18:25:40] <pcw_home> yes the field I/O (that line also enabled the expansion port)
[18:26:36] <pcw_home> sserial_port_0=0 would work also
[18:26:38] <andypugh> You can skip the sserial_port section I think, and it all gets enabled. Certainly that was the intention.
[18:26:38] <IchGuckLive> are there numbers for the xxxx or is it as you wrote
[18:26:51] <andypugh> "x" means "disable"
[18:27:14] <pcw_home> X means disable the channel
[18:28:33] <IchGuckLive> ok so if i do not need encoders at all just CONFIG="num_stepgens=5"
[18:28:44] <IchGuckLive> or do i need to tell endoders =
[18:28:51] <IchGuckLive> Zero
[18:29:25] <pcw_home> In general I think its better to disable the unused sserial channels so if you end up using then as GPIO the do not wobble around during the probe
[18:29:59] <IchGuckLive> Thanks fpr your help waiting for the part to arrive from oversea
[18:30:07] <pcw_home> same for encoders, i'd turn them off
[18:30:49] <pcw_home> (so you dont waste CPU I/O cycles reading something you will not use)
[18:31:22] <roycroft> folks - i still have some research to do on my cnc conversion, and cad drawings to make before i can fit the ball screws to my mill (and some tuning-up to do on my lathe so i can turn the ballscrew ends)
[18:31:30] <mrsun> hmm, i need manual running for the mill
[18:31:37] <mrsun> so i can use it without gcode also =)
[18:31:48] <mrsun> that is manual using the steppers but wheels to turn to move the steppers =)
[18:31:54] <roycroft> does it make sense to you to get my motors and encoders and work get the motors working prior to finishing the work on the mill itself?
[18:32:17] <IchGuckLive> ah so only 4 inputs 0-4 is sserial_port_0=50xxxxxx
[18:32:24] <roycroft> it seems i could mount the motors on a board and hook everything up for testing while working in parellel on the mill conversion
[18:32:33] * roycroft does not want this to take until fall
[18:32:54] <roycroft> i talked to a friend and he said to install the ball screws first, and work my way back to the computer
[18:33:08] <roycroft> he was quite emphatic about that, but could not give a good justification for that methodology
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[18:36:10] <andypugh> No, set up the motors on the bench and make sure it all works as expected.
[18:36:19] <roycroft> thanks
[18:36:31] <roycroft> the reason i was given is that "it's the logical way to do it"
[18:36:37] <roycroft> and i did not buy that :)
[18:36:51] <andypugh> You can do the electrical/computer setup in the house during the evening, and the machine work in the workshop when the weather is decent
[18:36:59] <roycroft> right
[18:37:07] <roycroft> that's what i'm planning on doing
[18:37:20] <roycroft> the computer is in my printer room right now, and i have to deal with the touch screen still
[18:37:31] <andypugh> Machining ballscrew ends might need CBN tooling.
[18:37:32] <roycroft> then i'll move it to my electronics bench, and get the motors hooked up
[18:37:46] <roycroft> i believe i can order them with the ends annealed
[18:38:14] <roycroft> if not, they're only case hardened
[18:38:33] <roycroft> i could hook a grinder up to my lathe and grind away the hardened part
[18:38:45] <roycroft> i could also use carbide tooling
[18:38:52] <andypugh> Well, CBN tooling is available from eBay, and you can get a really good finish (you just need ludicrous surface speed, like higher than even alumnium)
[18:39:21] <andypugh> red-hot swarf and sparks is the order of the day
[18:39:33] <roycroft> sounds like a good time!
[18:39:49] * roycroft will be sure to wear short sleeves, so he can savor the smell of burning arm hair
[18:40:44] <andypugh> http://www.youtube.com/watch?v=MLpv3x0hlck
[18:41:24] <Loetmichel> *hrmpf* Vacuum dust bag is too small... 5 bases done, second time i have to empty the vacuum... i should build such a "cyclone" type Duster...
[18:41:37] <andypugh> Is how it should look.
[18:41:39] <andypugh> http://youtu.be/IPP4r3H2VO8
[18:41:42] <andypugh> Is what I got
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[18:42:49] <roycroft> thanks! that was a nice exciting pre-lunch video
[18:42:52] <archivist> roycroft, I got motors running a long time before the hardware was ready, that way tests are more meaningful when you get to mount a motor
[18:43:44] <Connor> andypugh: Follow rest ?
[18:44:40] <andypugh> I got a good result late with a smaller cut, this is the same part. https://picasaweb.google.com/lh/photo/ajPl1y4hNjLTSUjmdbzQUdMTjNZETYmyPJy0liipFm0?feat=directlink
[18:45:02] <roycroft> the only reason i can see for working back from the ball screws is on an unknown device, where one would need to test to see how much torque is required to move each axis, so that the correct motor size can be calculated
[18:45:23] <Connor> I saw something about using ceramic inserts?
[18:45:24] <roycroft> the conversion i'm doing is pretty well-known, and the motors that folks usually use are overrated anyway
[18:45:26] <andypugh> You don't really need the ballscrews for that though.
[18:45:47] <andypugh> Connor: That is a ceramic insert, Cubic Boron Nitride
[18:45:48] <Connor> roycroft: what are you converting ?
[18:45:53] <roycroft> x3
[18:45:53] <archivist> roycroft, there are some calcs on the wiki for torque and acceleration somewhere
[18:45:56] <roycroft> the grizzly version
[18:46:30] <archivist> andypugh, you need a travelling steady :)
[18:46:58] <andypugh> archivist: A CNC one that auto-increments?
[18:48:09] <archivist> stop between cuts to adjust
[18:49:30] <ReadError> roycroft: you got a mill?
[18:49:30] <FinboySlick> archivist: Don't be so practical, you're taking away reasons to automate stuff.
[18:50:40] <Connor> Well.. a Follow Rest is what's needed.. it attaches to the saddle.. and moves with it.
[18:50:43] <archivist> er is my getting stuff made with what you have showing
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[18:51:14] <archivist> Connor, other name is travelling steady :)
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[19:05:44] <andypugh> What I really needed was a bigger spindle through-bore
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[19:11:18] <skunkworks> sounds like a girlfriend that takes a lot of trips..
[19:12:53] <Jymmm> O_o
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[19:34:48] <JT-Shop> or your girlfriend when your on the road
[19:35:20] <puff> What distro do people generally prefer for running the tools to generate the gcode?
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[19:35:59] <puff> I'm generally a debian/ubuntu guy; a friend is more into fedora but has had problems getting tools to run on fedora.
[19:37:21] <archivist> puff you can get away with just an editor so anything basicly
[19:37:57] <JT-Shop> puff: which tools?
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[19:43:19] * roycroft uses openbsd mostly, but will whatever os the tools he uses prefer in a vm
[19:43:40] <roycroft> will use, rather
[19:46:02] <JT-Shop> I use gedit
[19:47:32] <Tom_itx> ok mounted my caps to the boards finally
[19:47:51] <Tom_itx> now to mount them to the supply somehow
[19:55:29] <JT-Shop> I got the fuel tank made from an old 1 gal pump up sprayer... now to get the power pack to start!
[19:56:48] <archivist> JT-Shop, kit generator?
[19:58:05] <JT-Shop> yea
[19:58:17] <archivist> more fun then
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[19:58:30] <JT-Shop> let me take a photo so you can have a good chuckle or three
[20:01:32] <JT-Shop> http://imagebin.org/212514
[20:02:13] <skunkworks> wow - where did that come from?
[20:02:22] <skunkworks> mad max?
[20:02:33] <archivist> that is fun :), mine had its first run on the trailer when I got it too
[20:03:29] <archivist> I hope the governor is good to keep it at 60cs
[20:07:07] <JT-Shop> ha there is no tach on it so I'll have to use my multi meter to set the RPM
[20:07:45] <JT-Shop> it's a power pack that is used by farmers to pump water out of the wells
[20:08:11] <archivist> lack of large flywheel so may have fun with surges
[20:08:33] <JT-Shop> the flywheel is under the cover with the clutch
[20:09:03] <JT-Shop> heck I only have to run it 15-20 minutes to prove a point then back it goes to the farmer friend
[20:09:39] <JT-Shop> he thinks the generator came from a tug boat
[20:10:02] <JT-Shop> anyone spot the vise grips yet?
[20:11:19] <alex4nder> hey
[20:12:06] <archivist> JT-Shop, on the gen mid lower left
[20:13:12] <archivist> and looking on that, I probably missed about 6 pairs
[20:14:59] <JT-Shop> only two are holding the battery cables on right above the tyres
[20:15:33] <mrsun> can you inject gcode from the outside to linuxcnc ?
[20:15:35] <JT-Shop> those are the leads from the generator
[20:15:40] <JT-Shop> yep
[20:16:09] <JT-Shop> mrsun: yep
[20:16:15] <mrsun> hmm ok =)
[20:16:36] <JT-Shop> know where the simple g code generators are on the wiki?
[20:17:06] <mrsun> JT-Shop, nop ? :)
[20:17:20] <JT-Shop> know where the wiki is?
[20:17:27] <mrsun> i guess i can find it :P
[20:17:38] <JT-Shop> 1/2 way down the main page
[20:18:27] <JT-Shop> most of them inject code into Axis, just look at the source code
[20:19:04] <mrsun> is it the pendants you mean ?
[20:19:25] <JT-Shop> no, using linuxcnc, simple g code generators
[20:19:32] <mrsun> aha ok, thanks =)
[20:19:45] <JT-Shop> you need this > IN_AXIS = os.environ.has_key("AXIS_PROGRESS_BAR")
[20:20:06] <JT-Shop> and this def WriteToAxis(self):
[20:20:06] <JT-Shop> sys.stdout.write(self.g_code.get(0.0, END))
[20:20:06] <JT-Shop> self.quit()
[20:20:47] <JT-Shop> wow that was close to the cut and paste trigger
[20:21:02] <mrsun> hehe =)
[20:21:47] <JT-Shop> the above is python...
[20:22:58] <mrsun> hmm just remembered that linuxcnc has the function i want using the keyboard :P
[20:23:04] <mrsun> arrowkeys and page up/down
[20:23:08] <mrsun> to run the axises =)
[20:24:46] <mrsun> ofc, moving wheels feels more "real" =)
[20:25:55] <archivist> JT-Shop, should we post your pic on thereifixedit as a redneck special :)
[20:35:57] <JT-Shop> LOL
[20:46:12] <DJ9DJ> gn8
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[21:00:24] <Jymmm> Does jbweld work good on bonding metals to plastics?
[21:02:23] <syyl> jbweld is good for almost everything :D
[21:02:39] <syyl> but there are many plastics that can not be glued
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[22:05:23] <L84Supper> some plastics are more difficult than others but it generally just takes some pre-treatment to get them to bond, flame, plasma or corona treatment to get the surface energy up
[22:05:51] <L84Supper> there are adhesives for PTFE as well
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[22:29:55] <elmo40> or VHB tape :)
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[22:32:40] * JT-Shop ponders how to hold this part to start machining it
[22:38:25] <andypugh> It doesn't matter how you hold a part to start machining it. What matters is how you ar holding it when you finish.
[22:39:38] <elmo40> andypugh: well, sort of ;)
[22:39:53] <elmo40> JT-Shop: what does it look like? any holes going into it?
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[22:57:38] <JT-Shop> just a second and I'll get a photo of it
[22:57:38] <andypugh> Neat toolchanger. http://www.youtube.com/watch?v=RzR6L3lEXdM (if you are not desperate for rigidity, I suspect)
[22:58:13] <elmo40> nothing wrong with the rigidity
[22:58:21] <elmo40> the tooling is real light anyways ;)
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[22:59:06] <elmo40> and the red release pulls back ball bearings
[22:59:40] <elmo40> those bearing pull up on tip and the taper does all the holding, like a regular machine only smaller
[23:00:06] <elmo40> im not a fan of them being open to chips, mind you ;)
[23:00:47] <JT-Shop> http://imagebin.org/212543
[23:01:34] <andypugh> It seems to extend a long woy out of the spindle though?
[23:02:33] <JT-Shop> must be a ball lock thingy
[23:02:41] <andypugh> It would be easy to have a pivoting shield that was simply pushed out of the way, to keep the swarf out.
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[23:04:35] <andypugh> At some point I need to work out how to get the tools into my millng spindle. I have the drawbar, but can't decide beween an arm, rack or umbrella changer.
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[23:05:16] <andypugh> I might just leave it manual, the pneumatic drawbar was largely to avoid messing about with spanners.
[23:05:46] <JT-Shop> http://www.youtube.com/watch?v=BQhfcdQf1QA
[23:08:47] <JT-Shop> seems the mounting pads have the least amount of excess material...
[23:13:08] <JT-Shop> elmo40: http://imagebin.org/212543
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[23:20:04] <andypugh> JT-Shop: Bar through the middle and V-blocks to skim the feet, then use the feet?
[23:21:28] <r00t4rd3d> packing tape
[23:21:29] <andypugh> Or, if you have a belt-sander, just flatten the feet
[23:21:31] <JT-Shop> hmmm, I have some V jaws for the vise
[23:22:02] <JT-Shop> you think bore it on the lathe first to some std dimension?
[23:22:56] <andypugh> Maybe, but then I would probably bore the bore with a boring head in a mill.
[23:22:56] <JT-Shop> then put a bar through center to level feet?
[23:23:51] <andypugh> If you can get it in a 4-jaw chuck fairly centred then you could face-off the flange face and sit it on that.
[23:25:38] <JT-Shop> why would you use the boring head on the mill vs boring it on the lathe?
[23:25:42] <JT-Shop> just wondering
[23:26:00] <andypugh> I paid a lot of money for the boring heads
[23:26:48] <andypugh> Really, just because I have a lot more hold-down options on a mill table than in a chuck. If you have a faceplate, then it's different.
[23:32:51] <JT-Shop> I don't have a faceplate just a 4 jaw and a 3 jaw that I never use... well and a 5c collet closer too
[23:34:38] <andypugh> I use the 3-jaw quite a lot. Have you tested it? I think they have an underservedly bad reputation
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[23:36:11] <JT-Shop> the 3 jaw is ok if you don't need to start exactly so to speak on center
[23:36:22] <JT-Shop> it's a Bison so it is ok
[23:37:01] <JT-Shop> I've learned to indicate a part in the 4 jaw in just a few seconds so I never take it off anymore
[23:37:34] <elmo40> JT-Shop: do you have an A-axis on a cnc mill? :)
[23:39:18] <elmo40> it has a 1.5" through hole?
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[23:39:57] <elmo40> make the hole and the large face. flip it and make the back face, if you even have to.
[23:40:18] <elmo40> then with both faces done you can hold it in a vice and do the feet
[23:40:54] <elmo40> then with flat feet against the vice you can do the 6 holes
[23:42:48] <JT-Shop> yea, the cast is just a tad under 1.25" for the hole and the flange is way big too
[23:43:27] <elmo40> flange needs to be 2.75, how large is it now?
[23:44:47] <JT-Shop> 3"
[23:44:54] <elmo40> iron?
[23:45:02] <JT-Shop> cast iron yes
[23:45:14] <JT-Shop> it's a steam engine
[23:45:25] <JT-Shop> I'm used to square parts you know
[23:52:18] <JT-Shop> I have learned to drill slowly through funny areas