#linuxcnc | Logs for 2013-07-13

[02:10:42] <Jymmm> tom, etc check out this paint... https://www.youtube.com/watch?v=0mrD21NeSTE
[04:39:11] <DJ9DJ> moin
[05:36:16] <archivist> hmm cnc kit fleabay 400527467903
[05:44:24] <jthornton> cheap enough
[05:47:11] <archivist> yup price is right, partly in bits for greater entertainment value
[05:49:25] <jthornton> and easier loading
[05:54:41] <archivist> dunno if it would fit in the Mondeo though
[05:54:55] <_ink> oooh
[05:55:30] <ink> I can't do local pickup in the UK easily, though
[05:55:55] <ink> guess I'll have to keep my eyes out for another one
[05:56:07] <ink> I am interesting in getting CNC plasma cutting going here though
[05:56:09] <archivist> it is 145 miles from me
[05:56:32] <ink> I don't suppose anyone has any cnc plasma tips / recommendations? :)
[05:56:56] <ink> archivist: rent a truck and hoep the price stays right there ;P
[05:57:32] <archivist> I cannot afford much if anything at the moment
[05:57:42] <jthornton> hypertherm
[05:57:59] <ink> yeah cnc plasma would be a huge investment for me
[05:58:25] <ink> huh
[05:58:35] <ink> $2k cutting boxes?
[05:58:36] <ink> nice!
[05:58:52] <ink> I'd want to get a nice tig welder to go with that setup tho
[05:59:00] <ink> so I could actually assemble the things I would build
[05:59:31] <jthornton> Miller
[05:59:37] <ink> and I guess I need to fit it all on a metal cart I can push out of the warehouse, because I don't have good enough ventilation for cutting/welding in there
[05:59:53] <ink> jthornton: hehehe that's what the local welding shop guys say too
[05:59:57] <jthornton> water table
[06:00:02] <ink> water table huh
[06:00:10] <ink> ah yeah
[06:00:21] <ink> hmmmmm
[06:00:37] <ink> thanks for the tips! :D
[06:01:07] <jthornton> want to see how I built mine?
[06:01:11] <ink> yes!
[06:01:41] <jthornton> http://gnipsel.com/shop/plasma/plasma.xhtml
[06:01:52] * ink has a lasercutter but not much metalworking stuff to speak of yet
[06:02:13] <ink> oh wow
[06:02:22] <ink> looks very nice!
[06:02:34] <jthornton> thanks
[06:02:57] <jthornton> burned out some parts yesterday on it
[06:03:01] <jthornton> even took a video
[06:03:10] <ink> http://gnipsel.com/shop/plasma/plasma-03.xhtml
[06:03:11] <ink> ooh cool
[06:03:24] <ink> yea I saw a video link there but have not clicked
[06:03:50] <jthornton> that photo shows the water table in the old position which was too low
[06:04:27] <jthornton> this is the current setup http://gnipsel.com/shop/plasma/plasma-17.xhtml
[06:04:35] <jthornton> and no smoke or dust at all
[06:05:19] <ink> whoa
[06:06:04] <jthornton> also making the slats curve a bit makes them stiff so they don't wobble when you cut
[06:06:18] <ink> interesting
[06:06:32] <jthornton> btw, that was my first EMC project machine
[06:07:01] <ink> oh cool
[06:07:19] <ink> emc consulting?
[06:07:25] <ink> what is EMC project?
[06:07:46] <ink> er oh lol
[06:09:03] <ink> so how close to the water is the cutting surface?
[06:09:05] <jthornton> we used to be called EMC Enhanced Machine Controller till an evil corp stole the name
[06:09:15] <ink> or can you even have the whole thing submerged?
[06:09:22] <ink> ahhhh I see
[06:09:24] <jthornton> 3/16" but it could touch
[06:09:49] <ink> hmmm
[06:11:47] <ink> jthornton: do you have the video from last night online anywhere? :)
[06:12:13] <jthornton> let me see if it made it or not
[06:12:20] <ink> cool
[06:13:33] <jthornton> http://gnipsel.com/video/DashRamMount.wmv
[06:13:57] <jthornton> this shows you the incorrect path to take from part to part
[06:17:31] <ink> hehe I see
[06:17:50] <ink> very cool!
[06:18:38] <ink> incorrect path or maybe slat alignment
[06:18:50] <ink> it wouldn't have been a problem if the part didn't tumble in like that
[06:19:38] <jthornton> the correct path to the next part should have not be over the one I just cut
[06:19:45] <ink> ah right
[06:19:52] <ink> so how does that z-axis sensor work?
[06:20:05] <jthornton> very well
[06:20:18] <ink> haha, good
[06:20:22] <ink> but I mean, hmm
[06:20:35] <ink> it looks like it touches the metal and then a gap forms at some contacts by the cutter
[06:20:54] <jthornton> do you mean the touch off sensor?
[06:20:58] <ink> yeah
[06:21:02] <ink> oh I see how it works now
[06:21:08] <ink> hmm
[06:21:20] <ink> very cool
[06:21:55] <jthornton> torch is mounted on a floating head, the micro switch is connected to probe input so a probe move is used to find the material top and set Z0
[06:22:18] <ink> I see
[06:22:41] <ink> so the CNC gantry lowers down, and when the torch hits, it kinda lifts out of its seat
[06:23:13] <ink> er
[06:23:14] <ink> ohhhh
[06:26:21] <ink> mind if I ask what the parts you're cutting are for?
[06:28:07] <jthornton> dash mounts for Ram Balls to fit on Can-Am Spyders
[06:29:14] <ink> haha nice
[06:29:18] <jthornton> http://www.gnipsel.com/spydershop/dashmount.html
[06:30:58] <ink> aha
[06:31:00] <ink> hm
[06:31:18] <ink> now you got me thinking about plasmacutting a gokart
[06:31:23] <ink> >:)
[06:31:35] <ink> that could be fun
[06:38:03] <ink> jthornton: so is there any minimum thickness to a system like that? or could you cnc aluminum foil?
[06:41:32] <ink> I guess that depends on the plasma cutter you hook up to the thing :P
[06:41:45] <jthornton> I'm sure there is a practical minimum thickness, you would have to read the Hypertherm manual for that
[06:41:53] <ink> right
[06:41:57] <ink> hm
[06:42:35] <ink> so how big is that table of yours?
[06:43:31] <ink> er, what is the cutting area, I mean?
[06:43:40] <jthornton> I can use full 4' x 8' sheets and can cut 4' x 3'
[06:43:54] <ink> oooh nice
[06:44:05] <ink> hmmmmm
[06:45:03] * ink should go the dual-purpose plasmacutter / router option, maybe
[06:46:29] * ink has been using a laser and cutting things from 8.5/13.5 inch sheets
[06:47:26] <ink> being able to cut full sheets of plywood would be really nice
[06:48:59] <ink> but I think it would have to be a table that could fold against a wall, and be brought outside when actually cutting
[06:49:03] <ink> hm
[06:50:38] <jthornton> you can build it any way you want
[06:50:51] <ink> I'm guessing a cnc plasma cutter is not a thing you'd really want to move around too much, though, huh
[06:50:53] <ink> right
[06:51:24] <ink> hm
[06:51:32] <jthornton> no, it gets pretty heavy and hard to move
[06:51:42] <ink> I can imagine so
[06:52:13] <jthornton> if you notice on my design I can slip the full sheet between the top and bottom tubes so I can work on a longer sheet
[06:52:34] <jthornton> you can leave the front open on a router and do the same thing
[06:52:49] <ink> oh cool, yeah
[06:52:54] <ink> so both ends are open
[06:53:15] <ink> and you can just feed the material through in segments
[06:53:30] <jthornton> yes if it was not against the wall
[06:53:36] <ink> ah right
[06:53:39] <ink> very cool!
[07:00:54] <ink> hm
[07:02:00] <ink> it would be nice to have a plasma cutter to use to make my plasma cutter :P
[07:02:14] <ink> but they have one a techshop nearby here, so I can cut it with them
[07:04:00] <jthornton> building the plasma with the plasma http://www.youtube.com/watch?v=EC1_TTlsOrM&feature=c4-overview&list=UUt3eCzdbsQeuCifjsTyvvTg
[07:04:04] <ink> jthornton: so when you slide the workpiece across the width of the cutter, does it track how far you moved it? or just do absolute position on the cutting bed
[07:04:09] <ink> haha cool thanks!
[07:04:26] <jthornton> I don't understand your question
[07:05:04] <ink> making your own slats nice
[07:06:03] <ink> well you say both ends of the table are open, and it can cut 3' of the width of an infinitely-long (well, you know) piece of material
[07:07:03] <ink> just wondering if there is an easy way to make a single large design larger than the cutting area of the machine
[07:07:25] <ink> or if there is some alignment trick or something
[07:08:28] <ink> maybe even just like a rollerblade wheel on a rotary encoder, heh
[07:08:38] <jthornton> that does complicate things and yes you would have to align the moves somehow
[07:08:46] <ink> hmm
[07:08:53] <jthornton> not really practical
[07:08:57] <ink> right
[07:09:27] <jthornton> you can jog the torch to the new start point and use spacers to keep the sheet square to the machine
[07:09:50] <ink> ooh
[07:09:53] <ink> right ok
[07:10:01] <jthornton> make a small cut on the edge in the first step and align to the cut for the second cut after you push the sheet
[07:10:07] <ink> heh, yeah I was kindof thinking about a wood router machine there
[07:10:18] * jthornton heads out for break fast
[07:10:20] <ink> but even so I don't think that would work ;)
[07:10:31] <ink> cool, see ya later
[07:10:37] <ink> thanks for the tips!
[07:14:00] <ink> very cool stuff
[07:14:25] <ink> so not just the slats there, the cutter is building the frame for itself?
[09:31:21] <CaptHindsight> Jymmm: it's a 2K coating so rather than just leaving small tightly packed particles of polymer on the surface it cross-links them together
[09:32:53] <CaptHindsight> http://www.specialchem4coatings.com/tc/aliphatic-polyisocyanate/?id=1k-2k-systems
[09:41:21] <PetefromTn> Well I gave up....LOL
[09:42:26] <PetefromTn> Just Couldn't do it...
[09:44:23] <PetefromTn> I tried and tried but I just could not get it right.
[09:45:33] <PetefromTn> ;)
[09:59:09] <andypugh> What's that?
[10:01:41] <PetefromTn> Check this out...hilarious. http://www.youtube.com/watch?v=mfhGwUlIttw&feature=youtu.b
[10:02:23] <PetefromTn> andypugh: Oh I just gave up trying to grind up my own Engraver bit, broke down and bought three yesterday LOL.
[10:22:51] <Tom_itx> takes patience
[10:25:04] <Tom_itx> make a linuxcnc tool grinder
[10:27:29] <syyl_ws> or get a good single lip cutter grinder :D
[10:27:34] <syyl_ws> anybody said "deckel"?
[10:27:35] <syyl_ws> ;)
[10:34:05] <andypugh> I found a set of collets for my lathe on eBay. http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=181172544858
[10:34:20] <andypugh> Only twice what I paid for the lathe...
[10:48:15] <PetefromTn> Honestly while I would LOVE to have a tool and cutter grinder I think the $50.00 I paid for all three new engraver bits delivered is gonna be a little cheaper LOL
[10:51:17] <Tom_itx> not in the long run
[10:58:14] <syyl_ws> you can do a lot more with a t&c grinder :D
[10:58:22] <syyl_ws> i do a lot lathe bits with mine..
[10:58:44] <andypugh> http://www.ebay.co.uk/itm/221150603819 Still _quite_ a long run...
[11:02:08] <syyl_ws> ;)
[14:21:22] <archivist> andypugh, some spares for you on fleabay 290935637524
[14:34:47] <JT-Shop> can you replace a tooth on a gear like that?
[14:36:39] <archivist> in clock repair one makes inserts I have seen poor attempts on cast gears by bodgers
[14:37:36] <JT-Shop> like a tooth with a root that you braise in or something like that?
[14:37:58] <archivist> but you cut out the root of the tooth with a dovetail slot, rivet new in, file to suit
[14:38:17] <archivist> no brazing needed
[14:38:57] <archivist> done properly you wont be able to see the new insert
[14:39:18] <JT-Shop> ok, somthing like a turbine blade?
[14:40:53] <archivist> yes, but make it too long to give some extra to rivet and file flat
[14:45:50] <archivist> hehe the wrong way http://www.masterclockrepair.com/hallofshame.html
[14:48:13] <JT-Shop> ohhh that is fugly
[14:48:42] <archivist> http://www.davewestclocks.co.uk/repairing_a_hoop_wheel_from_a_30.htm
[14:49:09] <archivist> funny how that one breaks in the same place again
[14:49:49] <maximilian_h> hello, does somebody know if there is a variable setting for the ini file to make 2.5.2 accept radii values with only two decimal points of accurancy ? From my cad cam postprocessor I am only getting things like G2X3.02I4.06 and that makes the rs274 interpreter unhappy. With 2.3, that is a few years back I had to compile my own, but I hope that the situation has changed since then ?
[14:56:22] <Skullworks> can you fix your POST? - should be able to set output precision.
[15:09:16] <t12> lol the repair haters guide
[16:18:07] <DJ9DJ> gn8
[16:18:34] <AR_> so i'm trying to accurately configure my machine as far as distance per revolution of the motor
[16:18:55] <AR_> i'm pretty close now, but wondering if anyone has any tricks for more accuracy
[16:31:36] <Skullworks> Use a 1-2-3 block of known size ( is it 3.0000 or 2.999" ) and clamp a plate to the other side. Zero an indicator on one edge and do a commanded move of the length of the block - divide the indicator result by the number of motor turns required and work from there.
[16:34:24] <Skullworks> the longer the sample distance the better the results will be. I stacked 4 x 1-2-3 on a surface plate to check the height of the combined stack with a Tesa hite and had a 1ft sample to work from.
[16:35:28] <Skullworks> but then - you could add lead screw mapping to make up for screw variations.
[17:02:23] <tjtr33> 3D printers are attempting body parts ( livers/knees/tendon... ) and a company making such machines just went public,
[17:02:28] <tjtr33> look for ONVO on nasdaq.
[17:02:34] <tjtr33> http://www.organovo.com/
[17:02:35] <tjtr33> I noticed this next to a recipe for 'Soylent' in the new PM magazine ( very weird).
[17:17:51] <skunkworks> I need a liver?
[17:18:39] <ink> can't live without one
[17:18:46] <ink> I wonder how 3d printed tendons would work
[17:37:19] <andypugh> I would like to find out. My knee is deficient in that regard.
[17:42:10] <Tom_itx> they only get worse
[17:45:03] <sliptonic> I built the branch rtos-integration-preview3 a while back for my laser cutter and it's been working nicely (linux mint). I'd like to play with gscreen. Which branch would be recommended at this time?
[18:09:58] <micges> latest gcreen is in master branch
[18:12:59] <micges> sliptonic: rtos-integration-preview3-merged-into-master <- this branch is for you
[18:13:26] <sliptonic> micges: thanks.
[22:19:37] <t12> hum new stepper install went very easy
[22:27:46] <Jymmm> http://www.examiner.com/video/punked-tv-station-airs-falls-for-horrible-on-air-trick-about-crashed-pilot-s-names