#linuxcnc | Logs for 2015-12-05

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[03:02:54] <Deejay> moin
[04:39:49] <MikkoP> Started to model the CNC in SketchUp
[04:40:07] <XXCoder> thats definitely good idea
[04:46:56] <Jymmm> Can Sketchup output to other formats?
[04:49:47] <Jymmm> Can Sketchup output to other (useable?) formats?
[04:52:42] <ReadError> sketchup is hard ;(
[04:52:51] <ReadError> i tried it and couldnt figure out how to do anything useful
[04:53:29] <XXCoder> yeah couldnt hack it either
[04:53:35] <XXCoder> I like freecad hell of a lot more
[04:54:48] <Jymmm> But did you have a SpaceMouse? http://www.3dconnexion.com/products/spacemouse/spacemousewireless.html
[04:55:23] <Jymmm> or navigator? http://www.3dconnexion.com/products/spacemouse/spacenavigator.html
[04:58:45] <Jymmm> Or a magic chopstick?
[05:01:17] <XXCoder> BTCI
[05:05:49] <MikkoP> SketchUp hard? Oh, I've used many 3D modelling softwares and this is the most basic and simple by bar
[05:05:51] <MikkoP> by far
[05:06:13] <XXCoder> its very different to 3d modeling I used
[05:06:26] <XXCoder> took me quite a bit to get idea how freecad works
[05:06:36] <XXCoder> thankfully THAT has awesome tutorials.
[05:06:50] <MikkoP> Google is a great friend
[05:07:42] <MikkoP> I know how to use 3ds Max, SketchUp and Blender. When I model something really simple and really fast I use SketchUp, Blender for animations and 3ds Max for other more complicated ones
[05:08:51] <anomynous_> sketchup easy? It didnt look easy when i looked at some video. It looked quite hard actually. It's easier to create planes and stuff in solidworks ;D
[05:09:16] <anomynous_> its hard to imagine something would be easier than sw ;D
[05:12:32] <anomynous_> 3ds max and blender arent really cads, are they? They're more for artistic stuff
[05:13:08] <XXCoder> yeah
[05:13:14] <DaPeace> sketchup is very easy if you figured out how it works.. :-D
[05:14:11] <anomynous_> doesn't sketchup have limited resolution for machine parts?
[05:14:59] <anomynous_> in that it cant understand accurate enough measurements
[05:16:24] <DaPeace> limited resolution? you can set up to what kind of resolution ever you want..
[05:16:42] <XXCoder> anomynous_: theres many ways around
[05:16:45] <XXCoder> like 1000x
[05:17:18] <XXCoder> .0001" resolution usually is enough, and just do all parts 1000 times bigger and down scale
[05:21:18] <DaPeace> fusion 360 seems to be a cool solution at the moment. very modern.
[05:21:43] <anomynous_> kinda new. They just put hotkeys in it and operations search under s key
[05:21:50] <anomynous_> press s, and type what you wanna do
[05:21:51] <anomynous_> ;D
[05:21:56] <anomynous_> <- likes
[05:22:21] <DaPeace> me too. but didnt try to create something with it. only tried the interface and made some pockets
[05:22:38] <anomynous_> i havent used it much either
[05:22:52] <anomynous_> i think the idea is to keep it simple and make it extendable
[05:23:30] <DaPeace> and make it "freeware" for hobbyists..
[05:23:42] <anomynous_> well, hobbyists can write useful extensions ;)
[05:24:01] <DaPeace> thats great.. spending 3000EUR for a cam to mill with a 2000EUR-Mill is kinda overload :-D
[05:24:39] <anomynous_> 3k eur for a cam is cheaaaaap. But I think it can't stay that way for very long.
[05:26:16] <DaPeace> yeah i know. but there are very good solutions that are cheaper..
[05:26:21] <MikkoP> Well there's a ton of those softwares, everyone has their own choice :)
[05:26:52] <anomynous_> mun ohjelma on paras :]
[05:28:15] <MikkoP> Niinhän se on :D
[05:30:03] <MikkoP> Autodesk programs are good because they are one of the best ones out there and for students like me they are free :)
[05:31:44] <XXCoder> DaPeace: yeah theres couple but nothing really good
[05:32:13] <XXCoder> tempted to go to college one season just to buy some stuff like mastercam
[05:32:23] <anomynous_> sprutcam seemed quite cheap and not bad either, but idk really
[05:32:45] <XXCoder> can do audit which is cheap
[05:33:37] <MikkoP> Free is better than cheap
[05:33:49] <XXCoder> cant do college free
[05:33:57] <XXCoder> audit is like $20
[05:34:34] <MikkoP> Ah, well that's not bad. Most professional software costs hundreds if not thousands
[05:34:57] <XXCoder> MikkoP: no, auditing is attending class but not getting credit for it
[05:35:12] <XXCoder> but its still attending college so can buy at college rate for software
[05:36:21] <MikkoP> Ah lol I thought you were talking of some program :D
[05:36:47] <XXCoder> lol
[05:37:44] <DaPeace> ive had a look at sprutcam and mastercam but thats kinda rocketscience for me.. i need something where i dont need to study for :-D
[05:38:33] <anomynous_> mastercam... yuck
[05:38:46] <anomynous_> mastercam for solidworks is fine, though ;D
[05:38:49] <XXCoder> what cam do you use anomynous_
[05:38:55] <anomynous_> gibbscam
[05:39:13] <MikkoP> They look very complicated but once you discover the basic tools I think you can figure out the rest too
[05:39:14] <XXCoder> lol they should never end with s when adding cam at end
[05:39:18] <XXCoder> gibb scam
[05:39:37] <XXCoder> openscam = open scam :P
[05:39:54] <MikkoP> Of course ther's a lot of features one is never going to use but with Google the required settings and tools are easy to discover
[05:42:28] <anomynous_> i cant say i like gibbs much for some reasons.
[05:42:44] <XXCoder> of course
[05:42:47] <XXCoder> its a scam ;)
[05:42:53] <anomynous_> do you have experience?
[05:43:04] <anomynous_> or are you just joking?
[05:43:06] <XXCoder> gibbs nah not yet anyway
[05:43:10] <anomynous_> ok
[05:43:23] <XXCoder> joking actually because putting 2 words together can be split differently
[05:43:27] <XXCoder> gibbs cam
[05:43:30] <XXCoder> gibbscam
[05:43:33] <XXCoder> gibb scam
[05:43:37] <MikkoP> It would be awesome to have a machine to do this: http://www.mastercam.com/Portals/0/Images/news/press/130204-blade/blade-highres-1.jpg
[05:44:07] <XXCoder> heh popping out of window
[05:44:47] <MikkoP> Yea, that
[05:46:32] <XXCoder> allows you to drive a tool a longer wrapped line in kids care giving you the...
[05:46:34] <XXCoder> man
[05:46:45] <XXCoder> autocaptions can get weird when it get mostly right
[05:48:35] <XXCoder> gibbscam has no prices on site
[05:48:39] <XXCoder> means I cant afford it
[05:48:59] <MikkoP> http://s16.postimg.org/pgj8vpn3n/CNC.png Doesn't look like a CNC yet :D
[05:49:17] <XXCoder> youre already doing mucg better than I ever did
[05:49:32] <Jymmm> Never seen a retangular grenade launcher before
[05:49:57] <MikkoP> Where do you see that? :D
[05:50:25] <Jymmm> MikkoP: How many rectangular objects did you draw? =)
[05:50:53] <XXCoder> I don't think he reached billion yet
[05:51:25] <Jymmm> I only see one (plus the brown plane)
[05:52:39] <Jymmm> MikkoP: The motor looks like a supressor
[05:53:30] <Jymmm> the rail on top iike a scope/laser sight or some other optic
[05:55:00] <Jymmm> MikkoP: http://www.thefirearms.guide/wp-content/uploads/img_tavor1.jpg
[05:56:51] <Jymmm> with grenade/flare launcher http://www.tacopsgear.com/images/lr300w37mm2.jpg
[06:04:27] <MikkoP> Hah :D
[06:06:08] <MikkoP> I haven't really drawn anything yet, SketchUp has quite good collection of user drawn models available
[06:09:12] <Jymmm> ah
[06:09:43] <Jymmm> If I had a clue and the tools, I'd be making firearms.
[06:10:52] <Jymmm> In the US (per ATF, state laws can differ), you can make 80% of a receiver and it's just a chunk of metal.
[06:10:57] <MikkoP> The suppressor part in the "gun" is a rotary encoder. The shaft is so thick because it has a coupling on it :D
[06:12:12] <Jymmm> That is the LONGEST rotary encoder I've ever seen... 4" long?!
[06:13:01] <MikkoP> 38 mm
[06:13:12] <Jymmm> No, the big black thing
[06:13:28] <Jymmm> (looks like a double stepper motor)
[06:13:29] <MikkoP> Ah that's a motor :D 112 mm
[06:13:39] <Jymmm> THATS WHAT I ORIGINALLY SIAD SILLY!
[06:13:42] <Jymmm> lol
[06:14:10] <Jymmm> The thing on the end (I guess it's an encoder to you) looks like a.. um... choke
[06:14:18] <Jymmm> barrel choke
[06:14:25] <MikkoP> Njaa, maybe
[06:19:45] <MikkoP> The steel box section I have seems great on paper but now that I'm modelling with that I realize that's huge!
[06:20:14] <MikkoP> And I've been using 100x50 mm, it might even be 120x50 mm and it's 5 or 6 mm thick
[06:20:26] <Jymmm> lol
[06:45:58] <MikkoP> http://s21.postimg.org/9yw2cze6t/CNC_vertical_pillar.png Hmm :D
[06:46:18] <XXCoder> pretty thick
[06:46:19] <XXCoder> wood?
[06:46:40] <MikkoP> 100x50x6 mm steel box sections.
[06:59:43] <malcom2073> MikkoP: Looking good
[07:01:40] <MattoMatic> you haven't allowed for a radius on the tube. Is it flat enough to the edge to support the rails like that?
[07:02:25] <malcom2073> Yeah a cm or so on each corner is probably curved
[07:03:33] <MattoMatic> and you want the base to be on a flat part of the frame, with all the screws in, if you want to get the full benefit
[07:04:14] <MikkoP> Yea they have a little curve in the corners. I haven't checked what the radius is so I can't draw it correctly. This is just going to give me some idea how it's going to look.
[07:04:43] <MikkoP> MottoMatic: Yea, the base is now elevated just because it's easier to work with the base when there's some space between them
[07:05:41] <MattoMatic> try Mat<tabkey> . works in most clients :)
[07:06:32] <MikkoP> Typos heh :D Yea tab seems to work. I used a web based client earlier which didn't have that functionality. mIRC seems to have it
[07:07:38] <MattoMatic> the rails aren't infinitely stiff, so if the base is screwed to something that isn't straight and flat, the rails will conform to that shape, so perfectionists would grind under where the rails go
[07:08:54] <MattoMatic> for a first build, your main concern is just getting them straight and parallel enough not to bind
[07:10:32] <MattoMatic> this is way heavier than any machine I've actually built, so all I'm offering is theory I've learned mostly here
[07:13:41] <MikkoP> Yea, all true. That stuff is really heavy, about 11 kg/m
[07:14:57] <MikkoP> The vertical pillars are about 500 mm long and the horizontal is a little more. That's easily a good 17-18 kg
[07:16:54] <MattoMatic> more strength and stiffness is always good, but I wonder if you might be doing a bit overkill for a machine that size
[07:17:20] <MattoMatic> unless this is a proper mill for steel
[07:18:14] <MattoMatic> for woodwork etc, that construction would work nicely on a 8x4 full sheel routing machine
[07:18:39] <MattoMatic> full sheet
[07:20:54] * MattoMatic plywood brain
[07:22:21] <MikkoP> Yea it's probably an overkill. I'm just trying to use materials I already have
[07:23:10] <MattoMatic> I could use some tube like that myself right now. I've got an arc welder I'm itching to use
[07:23:41] <MattoMatic> and my real mill needs a spindle, but I'm making one out of plywood :p
[07:23:54] <MikkoP> :D
[07:24:15] <MikkoP> I have dozens of meters this stuff. Leftovers from building a house :D
[07:31:47] <MikkoP> It would be cool to build a large machine but I don't have anywhere to put it :(
[07:34:33] * JT-Shop is installing LinuxCNC on LinuxMint Mate
[07:37:45] <SpeedEvil> MikkoP: have you done the actual sums?
[07:37:59] <SpeedEvil> MikkoP: What is the deflection of the members at maximum cutting force?
[07:38:10] <SpeedEvil> Getting it much below .1mm or so may have little point
[07:38:47] <MikkoP> Haven't calculated anything.
[07:39:02] <enleth> MikkoP: please use imgur for photos, postimg spams with "your phone has viruses" pop-ups
[07:39:19] <enleth> and dating site ads
[07:39:39] <enleth> annoying and potentially not-completely-sfw
[07:39:40] <JT-Shop> yuck 26°F this morning
[07:40:43] <MikkoP> Ah, I'm using adblock so I don't see those. Will do!
[07:43:04] <Magnifikus> http://www.ebay.de/itm/IBM-12-POS-MONITOR-TFT-DISPLAY-IBM-4820-48T-KASSENDISPLAY-Windows7-rdy-/140799023462?
[07:43:11] <Magnifikus> found the perfect panel :D
[07:44:19] <Magnifikus> regarding stepgeneration, the position fb goes into the TP/MP every 1ms is processed and the pos-cmd is updated right?
[07:46:49] <MikkoP> http://i.imgur.com/jXCX1Ze.png
[07:47:26] <MikkoP> I've got a problem with that vertical axis mounting. Can't have those bolts there because I need to mount other things there.
[07:47:47] <MikkoP> And for that axis the steel box section is way too heavy. My motors can't lift that
[07:53:30] <DaPeace> Magnifikus: that panel has no hdmi or vga-port.. might be a problem to solder 26 hdmi-pins :-D
[07:55:35] <Magnifikus> its dvi
[07:55:55] <Magnifikus> just some strange port
[07:56:25] <DaPeace> yeah. so you need to solder or buy an adapter-cable
[07:56:52] <DaPeace> the touchscreens from pollin.de have higher resolutions and hdmi but no case :-/
[07:58:30] <Magnifikus> its shitty resistive touch
[07:58:45] <Magnifikus> we got one and it sucks :/
[07:59:11] <Magnifikus> maybe i order an adapter pcb from china
[07:59:16] <Magnifikus> and solder that in
[08:01:59] <DaPeace> yeah. i know. its not perfect but cheapest to get here.. the ibm is to large. i want to build a case for my mill and put the tft inside there.
[08:04:06] <ReadError> http://www.ebay.com/itm/Applied-Motion-Products-Brushless-Servo-Motor-48V-5-7A-200W-Encoder-/331611273222?hash=item4d35927806:g:HhEAAOSwLVZVr5R0
[08:04:11] <ReadError> seems like a nice value
[08:06:51] <MikkoP> Would something like this work under the CNC to drive the top thing back and forwards? http://i.imgur.com/K0SqHdz.png
[08:10:30] <kengu> some designs have something like that
[08:11:02] <XXCoder> side load is bit less effective but will work
[08:11:24] <XXCoder> if I recall it can stand 40% strength as compared to top down to supports
[08:11:25] <DaPeace> little thin and little long from screwball to bottom it think.. bit it will move :-)
[08:11:38] <DaPeace> *but
[08:11:52] <XXCoder> heh your machines MUCH stronger than mine is
[08:11:59] <XXCoder> probably can even do steel
[08:12:34] <XXCoder> though why not use U type beams or you dont have in stock?
[08:12:52] <XXCoder> I type if you can fit fangles
[08:13:19] <MikkoP> XXCoder: Yea it's better if the load is on the top but I sort of like this design. If these rails can handle that I'm going with this design.
[08:13:34] <XXCoder> One thing I noticed that im not certain
[08:13:45] <XXCoder> sheet that pushes gantry is little thin
[08:13:46] <MikkoP> I'm using this material for the frame because I have lots of it home.
[08:13:48] <XXCoder> and extended
[08:13:57] <XXCoder> its far from rigid
[08:14:08] <MikkoP> Yea that piece is thin. I was wondering what I could do to it.
[08:14:13] <XXCoder> I got a idea
[08:14:20] <XXCoder> change gantry to a frame
[08:14:22] <MikkoP> It too needs some shaping because straight lines are bad
[08:14:29] <XXCoder> the box type all way around
[08:15:24] <XXCoder> other ponental problem is ballscrew attachment point
[08:15:27] <kengu> why it is in a tab
[08:15:33] <XXCoder> it seems attached in wood?
[08:16:14] <XXCoder> you could add a middle beam, not box type but just basic U type
[08:16:19] <XXCoder> stronger
[08:16:35] <XXCoder> it will need cross links to sides for futher strength
[08:17:23] <XXCoder> honestly that'll work for wood though
[08:18:15] <XXCoder> nnoying thing about screenshot is that I keep wanting to use mouse to turn model around and see other sides lol
[08:19:33] <XXCoder> so
[08:19:41] <XXCoder> MikkoP: what ya think of my suggestions heh
[08:24:38] <XXCoder> well laters
[08:27:45] <MikkoP> XXCoder: Yea it's much better that way. It needs to be stiff and rigid.
[08:28:22] <MikkoP> However I'm not sure about the design yet. I don't want to limit the movement by adding more length to the support. Ballscrews are expensive
[08:31:18] <Tom_itx> jthornton
[08:31:41] <Tom_itx> if you decide to put a pico mesa section in, you could add that bitfile stuff i put in the wiki to it
[08:32:11] <Tom_itx> unless it's not appropriate for that section
[08:33:34] <Magnifikus> DaPeace, i like the capacitive + mineral glas so thats something that can survive a shop environment
[08:34:09] <jthornton> Tom_itx: I was talking about the forum but forgot to say so
[08:37:54] <MikkoP> Need to go for a few hours, have some party to attend to :D See you!
[08:38:41] <DaPeace> Magnifikus: yeah. i know. we have siemens sps-touchscreens at work that are resistive and suck very often..
[08:47:32] <Magnifikus> arcspiral.nc is that supposed to be slow in the middle? looks like my pi has problems with the math :D
[08:50:16] <Magnifikus> spiral runs fine
[08:53:18] <archivist> Magnifikus, which version are you running
[08:53:46] <Magnifikus> 2.8.0-pre1
[08:54:45] <Magnifikus> lemme check cpu load sec
[08:54:50] <archivist> should have the new planner and be reasonably fast
[08:55:33] <Magnifikus> http://pastie.org/10611082 dunno if thats active
[08:55:47] <Magnifikus> fnc is my fpga interface
[08:57:09] <ReadError> what interface are you using?
[08:57:46] <Magnifikus> spi
[08:58:27] <ReadError> made your own fpga controller for it?
[08:58:33] <Magnifikus> yep
[08:58:38] <Magnifikus> spartan3 for now
[08:58:39] <ReadError> nice
[08:58:48] <Magnifikus> preparation to move both into zynq :)
[09:00:02] <Magnifikus> what i dont like is, that i have to read position from fpga, run motion control, and write back
[09:06:50] <Magnifikus> and i still need to get the stepper configuration into the userinterface somehow
[09:07:12] <Magnifikus> cause the trinamic stepeper drivers got soooo many options to play with
[09:35:39] <Magnifikus> now i need to fit gmoncappy into 800x600 :D
[09:35:56] <Magnifikus> gmoccapy sry
[09:36:06] <archivist> quart into a pint pot!
[10:04:13] <SpeedEvil> Was there someone in here who was into puzzles? - rubics cubes?
[10:31:14] <zeeshan|2> TGIS
[10:31:19] <DaPeace> Magnifikus: gmoccapy in 800x600 works here but without any enhancedments or sidepanels :-D
[10:31:44] <Magnifikus> yeah :/
[10:32:01] <Magnifikus> trying to overscale
[10:32:13] <Magnifikus> but pi is a little bitch
[11:48:12] <gregcnc> I just brought home 70lb of Mic6 and 30lb of plastic for $25.
[11:48:33] <SpeedEvil> mic6?
[11:48:46] <gregcnc> aluminum jig plate
[11:49:44] <archivist> machined/ground flat al
[11:49:46] <gregcnc> https://www.alcoa.com/mill_products/north_america/en/product.asp?cat_id=1481&prod_id=619
[11:50:11] <SpeedEvil> Oooh - nice
[11:50:43] <Magnifikus> DaPeace, did you modify the .glade?
[11:50:55] <Magnifikus> i played with it but now the pause and stop button is not working anymore
[11:53:46] <Magnifikus> http://snag.gy/826ry.jpg i dont have spindle with vfc or direction control :)
[11:54:22] <Jymmm> rasberrypi ?!
[12:02:30] <Magnifikus> y
[12:02:44] <cncbasher> pi is just not worth the time , it's useless
[12:03:02] <Magnifikus> it will run on an odroid finally
[12:03:05] <Magnifikus> just testing
[12:03:27] <cncbasher> odroid works
[12:03:29] <Magnifikus> but its running fine
[12:04:02] <CaptHindsight> whatsamatta wit dah Rpi?
[12:04:29] <CaptHindsight> preempt_rt won't behave?
[12:23:01] <Jymmm> Magnifikus: You are running LinuxCNC on a pi?
[12:23:11] <Magnifikus> pi2 y
[12:23:28] <Jymmm> Magnifikus: and pi2 runs linux?
[12:23:52] <Magnifikus> Linux raspberrypi 4.1.13-rt15-v7+ #1 SMP PREEMPT RT Mon Nov 30 23:08:03 UTC 2015 armv7l GNU/Linux
[12:23:56] <Jymmm> Magnifikus: Or are you runing machinekit?
[12:24:08] <Magnifikus> nope linuxcnc 1.8
[12:24:21] <Magnifikus> 2.8?
[12:24:24] <Magnifikus> dunno the git one
[12:24:44] <Magnifikus> machinekit seems to run smoother but it also looks like a really old code base
[12:25:31] <Magnifikus> servo thread time is 100-200uS so not the best
[12:29:10] <CaptHindsight> somebody had Linuxcnc working on an arm9 a few years ago https://code.google.com/p/miniemc2/source/browse/trunk/emc2-arm/?r=78
[12:35:57] <DaPeace> how does that work with machinekit. is there a distri for that? is it newer? i dont really find any good informations about that..
[12:37:34] <DaPeace> Magnifikus: what connection do you use to connect to your machine?
[12:38:07] <Magnifikus> spi -> fpga step generator -> tmc5130a driver with 2amp/256µStep
[12:38:26] <DaPeace> ahh some selfmade-hardware
[12:38:53] <Magnifikus> https://www.dropbox.com/s/cqsds87g765gnx1/2015-11-30%2020.05.25.jpg?dl=0
[12:39:20] <DaPeace> nice
[12:39:33] <Magnifikus> https://www.dropbox.com/s/05zyv97uj68y3au/2015-11-30%2020.03.11.jpg?dl=0 any my test environment atm
[12:40:41] <Magnifikus> but need to fix some bugs still, get axis following errors sometime when running at >1600mm/min
[12:41:06] <Magnifikus> guess its the hal component bridge to spi
[12:41:19] <DaPeace> ok. what distribution do you use on the pi?
[12:41:31] <Magnifikus> stock rasbian 8.0 minimal
[12:41:37] <Magnifikus> + custom kernel with rt patch
[12:41:42] <Magnifikus> + linuxcnc latest git
[12:41:53] <Magnifikus> also tried latest machinekit but thats a real pain to compile
[12:42:20] <FAalbers_> Good Morning
[12:42:34] <Magnifikus> and shitty is, on startup linuxcnc greets you with realtime task bla
[12:42:36] <Magnifikus> hai
[12:45:06] <Magnifikus> will try xenomai next
[12:45:16] <Magnifikus> guess preempt rt is shit :)
[12:45:29] <DaPeace> so machinekit is a package like linuxcnc and you only need the rt-kernel running right?
[12:46:03] <DaPeace> and get it from the git , compile and then? configure it like linuxcnc? or is there anything special?
[12:48:22] <cncbasher> xenomai is the only one that works on arm
[12:48:23] <Magnifikus> its a real pain to compile, dependencies not in apt etc
[12:51:59] <DaPeace> do you see anything better in concept there?
[12:53:09] <cncbasher> machinkit is the only one to run on pi & beaglebone just about out the box
[12:53:28] <cncbasher> using xenomai
[12:54:01] <DaPeace> yeah ok. thats one side of the medal.. but its available for pcs too and i wondered a little time ago what makes it better or other than linuxcnc..
[12:54:49] <pcw_home> Preempt-RT on newer x86s is pretty close to RTAI in latency
[12:54:58] <cncbasher> it is linuxcnc , just built differently and specificly targeting arm etc
[12:55:01] <Magnifikus> yeap confirm that cncbasher :)
[12:55:22] <Magnifikus> it was a 6 hour job to compile that from stock raspbian
[12:55:44] <Magnifikus> +3 hours kernel compile + 2 hours compile with make -j1 the linuxcnc code
[12:55:57] <Magnifikus> cause -j2+ OOM :D
[12:56:18] <DaPeace> ok. so its more open to other platforms. thanks for the info. ive read about it but the homepage is not really good enough to describe why i should use it instead of linuxcnc :-D
[12:56:46] <cncbasher> what do you need to know ?
[12:57:12] <Magnifikus> howto export a normal machine to the android app :)
[12:57:20] <cncbasher> theirs a google group , where most of the talk of machinkit is
[12:58:23] <DaPeace> now i know what i need to know.. i dont like do subscribe to a list where i have to ask stupid questions.. i like to ask stupid questions here much more :-D
[12:58:24] <cncbasher> on android it's running as a server , with just the gui on android and the server on a beaglebone
[12:59:25] <cncbasher> you can still get stupid answers , their just formatted better
[13:00:30] <DaPeace> yeah but the answers right now are really correct and i now know what it really is :-D
[13:01:33] <Magnifikus> cncbasher, yeah i get that, but its hard to understand howto set it up :)
[13:01:59] <Jymmm> In respect to "SheetCam"... Does it just let you CUT sheetmetal, or also do things like bend it into various shapes?
[13:02:01] <Magnifikus> it sounds like you start a normal .ini with axis and export that to "apps"
[13:03:03] <cncbasher> sheetcam is only a cam for cutting , it's not a cad package
[13:03:47] <Jymmm> cncbasher: Is there something that lets you bend sheetmetal into various things?
[13:04:59] <cncbasher> such as ?
[13:06:09] <SpeedEvil> Origami
[13:06:27] <Jymmm> cncbasher: https://www.youtube.com/watch?v=ydJ6Fy3r_ZU
[13:08:38] <cncbasher> arh , ok got ya
[13:08:42] <Jymmm> SpeedEvil: I WISH!!! =)
[13:08:59] <zeeshan|2> http://i.imgur.com/vkNctCC.jpg
[13:08:59] <cncbasher> i wish , i could do with one of those
[13:09:09] <zeeshan|2> http://i.imgur.com/RZ98CXR.jpg
[13:09:10] <zeeshan|2> :D
[13:09:22] <zeeshan|2> melt some aluminum today
[13:10:02] <Jymmm> zeeshan|2: Dude, that firebrick is gonna leave a nasty scar when it falls on your hand/wrist/head
[13:10:04] <cncbasher> i'm not aware of one
[13:10:18] <zeeshan|2> cant wait to heat treat stuff :-)
[13:11:12] <cncbasher> linuxcnc could certianly do the machine side of things , but the cam package for it would be the problem at the moment , i would think
[13:11:24] <zeeshan|2> cncbasher: get linuxcnc-features working
[13:11:26] <zeeshan|2> it does a lot!
[13:11:29] <zeeshan|2> i cant get it working :{
[13:11:31] <cncbasher> i'll see what i can find out
[13:11:46] <cncbasher> linuxcnc-features works fine
[13:12:31] <cncbasher> have you the latest version ?
[13:12:49] <cncbasher> theirs a setup program that helps set it all up
[13:13:25] <zeeshan|2> it doesnt work because
[13:13:37] <zeeshan|2> it tries to take over any space that gladevcp usually resides
[13:13:43] <zeeshan|2> so if you have a custom panel
[13:13:45] <zeeshan|2> it interferes
[13:14:39] <cncbasher> yea i noticed that
[13:14:56] <cncbasher> although it was on the cards to be fixed at some stage
[13:17:33] <zeeshan|2> i got it working in a stand alone window
[13:17:34] <zeeshan|2> but
[13:17:44] <zeeshan|2> when i try to post code for a regular drill bolt pattern
[13:17:46] <zeeshan|2> i get a plane error
[13:19:02] <Jymmm> planes use rivets, not bolts =)
[13:19:21] * zeeshan|2 puts Jymmm on ignore
[13:19:37] <Jymmm> zeeshan|2: Carry on biotch!
[13:25:00] <zeeshan|2> damn it where is my ladle
[13:35:56] <Roguish> zeeshan|2 you making pizzas?
[13:38:25] <Jymmm> zeeshan|2: I'll take a large pepperoni, sausage, mushroom, and olive
[13:38:59] <Jymmm> zeeshan|2: easy sauce
[13:39:20] <Roguish> heavy on the garlic, it's vitamin G, ya know.
[13:39:45] <Jymmm> Oh yeah, garlic sauce on mine zeeshan|2
[13:39:57] <Jymmm> Roguish: I didn't see that on the menu
[13:41:48] <Jymmm> Is there a way to weld rebar without (traditional) welding? Maybe some friction/heat/fusing sorta thing?
[13:42:09] <Roguish> thermite
[13:42:10] <Jymmm> Just want to make large rings (like hoola hoops)
[13:42:22] <Roguish> or forge
[13:42:47] <Jymmm> Roguish: Soemthing more idito proof
[13:42:54] <Jymmm> idiot*
[13:43:03] <Roguish> bailing wire....
[13:43:20] <Jymmm> 3/8" rebar = BIG bailing wire =)
[13:43:30] <Jymmm> I meant a good solid weld
[13:43:37] <Roguish> then weld
[13:43:51] <Roguish> split nut?
[13:43:53] <Jymmm> lots of heat + press?
[13:44:28] <Jymmm> when you say forge, I think ots of beating the crap out of with hammers
[13:44:32] <Jymmm> lots*
[13:45:11] <Roguish> like this: https://www.platt.com/platt-electric-supply/Split-Bolts-Copper-Alloy/Ilsco/IK-4/product.aspx?zpid=87199
[13:45:56] <Roguish> http://www.sears.com/stanley-hardware-850834-wire-cable-clamp-44-stainless-steel/p-SPM7571224003?prdNo=1&blockNo=1&blockType=G1
[13:45:58] <Jymmm> or this http://ecx.images-amazon.com/images/I/41BsYbii7lL._SY300_.jpg
[13:46:11] <Roguish> yup
[13:46:28] <Roguish> depends on the load, but it could work.
[13:46:53] <Jymmm> I was looking for a way to adhere the stel to itself
[13:46:55] <Jymmm> steel
[13:47:57] <Jymmm> Roguish: Something along this line... http://ecx.images-amazon.com/images/I/41BsYbii7lL._SY300_.jpg
[13:48:35] <Roguish> sure. could work. depends on the load/usage
[13:48:41] <Jymmm> Roguish: Sorry, this https://www.youtube.com/watch?v=0vL-sArhmkI
[13:49:33] <Roguish> u making an induction heater?
[13:49:59] <Jymmm> Roguish: I could instead of welding
[13:50:03] <cncbasher> induction is the easy way
[13:50:28] <Jymmm> But not sure how to "fuse" them once heated
[13:51:11] <Jymmm> fricion wleding would be perfect =)
[13:52:09] <Jymmm> https://www.youtube.com/watch?v=-aEuAK8bsQg
[13:54:27] <Jymmm> Roguish: Ok, you win... https://www.youtube.com/watch?v=XQViDITyIKs
[13:55:50] <Roguish> and that is how rail tracks are welded. in the US also.
[15:00:34] <Tom_itx> zeeshan|2, what you cookin today?
[15:01:46] <anomynous_> Roguish, in the us they measure the thermite in ounces or pounds or barrels ;D
[15:03:28] <MrSunshine> a barrel of thermite
[15:03:40] <MrSunshine> would be fun to place outside someones door and knock
[15:04:58] <Jymmm> MrSunshine: What door? There would be no door, wall, foundation, just a crater
[15:05:41] <MrSunshine> thermite does not explode ?
[15:06:01] <Jymmm> the sheer heat
[15:07:16] <MrSunshine> meh, thermite doesnt even boil water
[15:07:40] <Jymmm> neither does a fission
[15:07:43] <Jymmm> -a
[15:08:03] <MrSunshine> hehe, thermite is awesome tho =)
[15:12:52] <zeeshan|2> Tom_itx making a big business move.. :p
[15:12:59] <zeeshan|2> partnering up with another 2 people i think
[15:13:20] <zeeshan|2> i have outgrown out of my home shop =/
[15:14:06] <zeeshan|2> ill be back
[15:15:29] <Tom_itx> you mentioned that last week
[15:15:58] <Sync> zeeshan|2: you need a larger home shop
[15:16:10] <Tom_itx> yeah, and fewer partners
[15:19:56] <renesis> is one of them an optomistic bullshitter? you need that guy to become successful and eventually get fucked over
[15:21:38] <Tom_itx> yeah he's the overengineer
[15:27:19] <Swapper> Hi!, Anyone know if i can change the movment direction on an axis in the .ini file of linuxcnc ? its a servo system.
[15:28:08] <Swapper> or do i need to swap the encoder signal A B and ENCODER_SCALE = ?
[15:28:28] <JT-Shop> usually just change the scale sign
[15:28:41] <Swapper> ENCODER_SCALE = ?
[15:28:48] <JT-Shop> yea
[15:28:54] <Swapper> and that will not cause a runaway ?
[15:29:01] <Swapper> or should not
[15:29:27] <JT-Shop> well you do have to check the encoder is going the right direction
[15:29:33] <andypugh> I think you might need to change the pwm generator scale too.
[15:30:11] <andypugh> But you shouldn’t get a runaway if your following error limits are reasonable. (Well, you will, but it will be a short one)
[15:30:50] <Swapper> im not worried about the actual runaway i have e-stop, but im not getting clear on what values to change
[15:30:59] <Swapper> i found a thread about it but it where not clear.
[15:31:09] <Swapper> i have a mesa 7i77 so its analog out
[15:32:24] <Swapper> http://www.pastebucket.com/95944
[15:32:26] <andypugh> I can’t remember what the output scaling parameters are called on the 7i77
[15:32:32] <Swapper> theres a axis i need to swap
[15:32:47] <Swapper> if somone have the time to check quick
[15:33:14] <andypugh> Unfortunately the HAL can use the INI values any way it wants.
[15:33:52] <Roguish> swapper: encoder scale is an absolute. if the encoder is backwards, i have found it easier to reverses the signals (2 wires) from the encoder to whatever board you have.
[15:34:01] * JT-Shop goes back to chucking wood
[15:34:02] <andypugh> What is OUTPUT_SCALE used for in the HAL?
[15:34:25] <andypugh> Roguish: No, it really is easier to edit the iNI
[15:34:38] <Roguish> to each our own.
[15:34:44] <Swapper> setp hm2_5i25.0.7i77.0.1.analogout1-scalemax [AXIS_1]OUTPUT_SCALE
[15:35:13] <Roguish> yeah, one can swap the signals in HAL.
[15:35:44] <andypugh> OK, set ENCODER_SCALE to +9830.4 and OUTPUT_SCALE to -1 and the axis should reverse.
[15:36:04] <Swapper> andypugh: ill try it, ty !
[15:39:17] <Swapper> andypugh: works!
[15:39:25] <Swapper> andypugh: thanx.
[15:39:57] <Swapper> Now i only need to relearn how the mill moves... :) Stupid me had the axies wrong from the beginging.
[15:40:31] <andypugh> My mill has two differet configs, one for the horizontal spindle and one for the vertical. Very confusing.
[15:41:12] <Swapper> Ahh guess that can be a bit of a mind bender
[15:54:04] <JT-Shop> just looking at my bp and my encoder scale is -xxxx
[15:54:32] * JT-Shop wonders why I have STEPGEN_MAXACCEL in my servo ini file???
[16:00:00] <JT-Shop> must be left over from a sample config I started with
[16:00:08] <JT-Shop> seems to run without it lol
[16:01:09] <Oku71> Hey
[16:01:47] <Oku71> I'm new to LinuxCNC; i've heard about it but currently have a grbl controller managing my shapeoko3
[16:04:46] <andypugh> I believe that grbl works pretty well with printers
[16:04:58] <Oku71> heh
[16:05:40] <andypugh> (I haven’t tried it, I don’t have a printer)
[16:10:16] <JT-Shop> 5 more bins of firewood to chuck
[16:10:24] <JT-Shop> so I can get my last bit of cladding on
[16:10:57] <Oku71> I've been milling carbonfiber
[16:11:15] <Oku71> but having problems with accuracy across the sheet, can't get it flat enough
[16:11:57] <Oku71> I'm using spray adhesive to attach it to an equal sized piece of carbon; but neither are perfectly flat, in the worst case I have about 5mm of deflection over 50cm
[16:12:46] <Oku71> drilling a hole in the center of it and bolting the sheet down, instead of just holding the sheet to the wasteboard on the sides..
[16:13:08] <SpeedEvil> vacuum can work
[16:13:38] <Oku71> would have to be a strong vacuum table.. this is more of a hobbyist workshop/budget
[16:14:04] <SpeedEvil> A good shopvac hits ~1/3 atm
[16:14:15] <SpeedEvil> That's 3 tons/m^2
[16:14:26] <Oku71> hmm well I have a festool vac that's managing the dust
[16:15:10] <Swapper> Are you doing part that go thrugh the sheet? Because that will break vacuum.
[16:15:16] <Swapper> if not taken in to account
[16:16:00] <Oku71> at the moment I've been attaching the carbon to a 1/8" disposable cedar wasteboard with some spray adhesive
[16:16:27] <Oku71> so I typically mill about 1 to 1.5mm thru the carbon into the wasteboard..
[16:16:59] <Oku71> err mixing units.. 3.1mm thick wasteboard.. :)
[16:17:02] <SpeedEvil> Swapper: that depends.
[16:17:15] <SpeedEvil> Swapper: you can have gaskets or other sealant round to not
[16:17:52] <Swapper> SpeedEvil: yes as i said, if not taken in to account.
[16:19:01] <Deejay> gn8
[16:19:08] <SpeedEvil> https://www.youtube.com/watch?feature=player_detailpage&v=eifVwXr7AGk#t=344
[16:19:20] <Oku71> All of my carbon sheets are the same size; ~51cm x 51cm.. so I could probably build a vacuum box for this specific application
[16:19:33] <SpeedEvil> slightly elaborate fixture
[16:20:59] <Oku71> yeah just a bit! interesting video though
[16:21:21] <Swapper> SpeedEvil: Seen that, its real cool, hes doing his hown bearings for knives
[16:21:33] <SpeedEvil> yeah
[16:21:42] <Swapper> even machines the pocket for the balls with a ball endmill
[16:22:31] <Oku71> I need a bigger cutting area! 42x42cm isn't cutting it
[16:22:51] <SpeedEvil> It's a prime example of when stock stuff doesn't work for a design
[16:22:53] <Swapper> literaly then :)
[16:22:58] <Swapper> you cant cut bigger :)
[16:22:59] <Oku71> yerp :p
[16:23:02] <SpeedEvil> the easy way is to redesign, but...
[16:23:55] <Swapper> Anyone that have worked with ice fixtures ? i have collected parts to try a basics ice fixture plate but not got round to test it
[16:24:10] <SpeedEvil> ice fixtures?
[16:24:21] <SpeedEvil> hmm
[16:24:26] <SpeedEvil> I've used wax
[16:24:28] <Swapper> yea they exist
[16:24:47] <Swapper> they use them to cut real thin layers of no magnetic materials
[16:25:25] <SpeedEvil> is the part submerged in the ice?
[16:25:28] <Swapper> https://www.witteasia.com/products/vacuum/freeze-clamping-technology/ice-vice.php
[16:25:38] <Swapper> no a thin layer of water on a cold surfave
[16:25:40] <Swapper> surface
[16:26:01] <Swapper> like lickning on a pole when its -30c outside
[16:26:08] <SpeedEvil> ah
[16:26:58] <Swapper> but these work at -6 -10
[16:27:16] <Swapper> my go at it is to use watercooled peltiers
[16:27:35] <Swapper> since i do not know how they make -6 degrees with only compressed air
[16:27:56] <Swapper> some magic with compression/decompression of gasses prob
[16:28:28] <andypugh> Swapper: http://uk.rs-online.com/web/p/pneumatic-cold-fraction-vortex-tube-kits/2911306/
[16:28:50] <SpeedEvil> Swapper: how large an area?
[16:28:59] <Oku71> tormach seems to sponsor quite a few youtube cnc channels
[16:29:06] <Swapper> SpeedEvil: on mine or the comersial ones?
[16:29:12] <SpeedEvil> Swapper: youre
[16:29:31] <Swapper> the test plate i made where 10x12 cm only
[16:30:26] <Swapper> but i dont see that beeing a limitation, when getting up to real large areas some significant power is required though
[16:30:35] <Swapper> Peltiers are quite power hungry
[16:31:00] <SpeedEvil> Or you can not. And get a small freezer, and simply fill it full of a tank of brine.
[16:31:59] <Swapper> Yea, i guess you only need the cooling to keep the plate from not thawing ither by the air in the room or by the cutting of the material
[16:32:20] <Swapper> But it can take some time to refixture a part if its a big plate
[16:32:32] <Swapper> Might need some reversal to thaw the plate
[16:33:20] <andypugh> Peltier devices only guarantee a temperature difference. I tried to make a milk carton fridge once, and it turned out to be good at making one side warm and the other side hot.
[16:34:12] <Swapper> ive used peltiers for overclocking CPUs and if they are watercooled they perform quite well
[16:34:58] <Swapper> if watercooled and there is no significant load in the "cold" side it can get quite cold.
[16:37:16] <Swapper> http://www.heatsink-guide.com/peltier.htm
[16:37:41] <Swapper> So when the cold block is cold you can get delta ts up to atleast -40c
[16:38:05] <andypugh> I would imagine that the milling machine table could be a decent heat-sink
[16:39:20] <Swapper> yea for shorter runs it might work, but it can get quite hot.
[16:39:52] <Swapper> my stack of 6 peltiers will draw about 500W
[16:42:56] <Swapper> gnite
[16:58:35] <SpeedEvil> Steel is crappy as a heatsink
[16:58:52] <SpeedEvil> it's very easy to get >>500W from a very, very modest pump from a cold reservoir
[16:58:59] <XXCoder> yeah lower heat mobility
[16:59:16] <XXCoder> chrome is even worse
[16:59:41] <SpeedEvil> Cast iron is lots worse than steel even
[17:46:47] <Loetmichel> SpeedEvil: stainless is even worse
[17:46:56] <SpeedEvil> yeah
[17:47:13] <CaptHindsight> insulators make the worst heat sinks
[17:47:54] <Loetmichel> CaptHindsight: glass isnt that bad for example
[17:48:06] <Loetmichel> so not all insulators are also bad heatsinks
[17:48:45] <SpeedEvil> I have wondered about pans with integrated heatpipes, which should exist, to make them isothermal
[17:48:45] <CaptHindsight> heat insulators, not electrical insulator or sound insulators
[17:48:46] <SpeedEvil> but...
[17:49:33] <CaptHindsight> people tend to have myopic views of how thermal management works
[17:50:15] <CaptHindsight> like the earlier peltier comments
[17:59:20] <Loetmichel> CaptHindsight: sorry then
[17:59:28] <Loetmichel> i thought you meant electric insulators
[17:59:50] <SpeedEvil> Peltiers are actually decent
[17:59:58] <SpeedEvil> At 10-15C delta-T
[18:00:00] <Loetmichel> SpeedEvil: bes pand and pots are the ones with the copper bottom
[18:00:02] <SpeedEvil> But...
[18:00:07] <Loetmichel> ...for a reason ;)
[18:00:15] <Loetmichel> best pans
[18:00:37] <SpeedEvil> Loetmichel: yes, laminated SS/copper/SS for example
[18:01:02] <Loetmichel> i like the ones with soldered on copper plate on the bottom better
[18:01:25] <Loetmichel> the laminates tend to have a 1 atom layer thic copper plate in them
[18:01:29] <Loetmichel> not that effective
[18:01:35] <SpeedEvil> and yes, I mean proper.
[18:01:53] <Loetmichel> the ones where you can SEE the copper are usually at least 2mm thick
[18:02:56] <Loetmichel> (altho i had one that was only 0,2mm thick copper, only bent at the rim to look like 3mm...
[18:03:12] <Loetmichel> ... which i discovered when i forgot the pot on the burner...
[18:04:10] <Loetmichel> and when the spagettistaertet to burn i lifted the pot from the burner and have thrown it on the lawn.. (it waws raining)... then i noticed that the "copper foil" was still on the burner...
[18:04:21] <Loetmichel> mut have exeeded the solder melting temp ;)
[18:22:40] <Jymmm> Is there an SIMPLE way to make an Archimedes' screw ?
[18:23:05] <cpresser> define simple?
[18:23:40] <Jymmm> cpresser: Simple: even you could do it =)
[18:23:53] <cpresser> hehe. 3D-Print^^
[18:24:18] <Jymmm> cpresser: Sure, if it'll stand up to 400F =)
[18:24:24] <Jymmm> continously
[18:24:40] <cpresser> that would be ~200°Celius?
[18:24:47] <Jymmm> fiik
[18:25:27] <Tom_itx> grain auger
[18:25:43] <cpresser> Milling with rotary-axis seems pretty straightforward for a archimedes-screw
[18:26:17] <Tom_itx> Jymmm, how long?
[18:26:18] <Jymmm> Tom_itx: DUDE! I could kiss you!!! (auger drill bit)
[18:26:22] <Tom_itx> posthole digger
[18:26:30] <Tom_itx> don't bother pls
[18:26:50] * Jymmm plants one dead smack on Tom_itx's lips!
[18:27:07] * Tom_itx pulls his pants back up
[18:27:27] <Jymmm> Um, if you have no pants AND lips...
[18:27:41] <Tom_itx> wrong cheeks!
[18:27:57] <Jymmm> I said LIPS
[18:28:09] <andypugh> Can we just move on?
[18:28:14] <Tom_itx> please
[18:28:28] <Jymmm> lmao
[18:28:48] <Tom_itx> for an op you sure troll alot
[18:29:23] <Jymmm> Tom_itx: Hey, I was just expressing my appreciation of your idea. YOU are the one that had no pants on. M'kay
[18:31:39] <Jymmm> What determines the flow rate on a auger style screw? angle of "threads" Quantity?
[18:32:29] <Tom_itx> http://talk.newagtalk.com/forums/thread-view.asp?tid=27433&DisplayType=nested
[18:33:03] <Tom_itx> http://www.all-fill.com/auger-filling-calculator/
[18:33:42] <Jymmm> Tom_itx: TYVM
[18:33:55] <Tom_itx> :)
[18:34:37] <Jymmm> WOW! This is going to me MUCH easier than I thought to do.
[18:34:41] <Tom_itx> http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1148&context=biosysengfacpub
[18:35:45] <Tom_itx> my HS classmate lost a foot in one so be careful
[18:36:07] <Jymmm> I have an old 9V makita drill, some bearings, and know where to get some auger drill bts from CHEAP
[18:36:39] <Jymmm> Tom_itx: A 1-2" auger bit will be perfect
[18:36:51] <Tom_itx> making PLA?
[18:36:54] <Jymmm> Tom_itx: nothing body part moving
[18:36:58] <Jymmm> PLA?
[18:37:06] <Tom_itx> glue gun material
[18:37:17] <Jymmm> OH, gawd no
[18:37:20] <Tom_itx> reprappers are making these
[18:37:40] <Jymmm> "pumping" sand
[18:38:33] <Tom_itx> watch 'gold rush' they're using a rather large one
[18:38:35] <Loetmichel> Jymmm: then get some hardox steel plate
[18:38:47] <Loetmichel> and cut a bunch of circles out of it
[18:38:50] <Loetmichel> bend them
[18:39:00] <Loetmichel> and weld them to a hardox shaft
[18:39:01] <Loetmichel> done
[18:39:27] <Loetmichel> thats how the bigger augers are made
[18:39:46] <Jymmm> Loetmichel: Ah, I'm thinking one of these http://www.qy1.de/img/bohr308352a.jpg
[18:40:07] <Jymmm> ..per Tom_itx's suggestion
[18:40:18] <Loetmichel> ah, these are called "schlangenbohrer" over here
[18:40:22] <Tom_itx> or meat auger
[18:40:29] <Loetmichel> but they will not last long with sand
[18:40:40] <Loetmichel> the steel isnt made for that
[18:41:09] <Jymmm> Loetmichel: This is very fine #20 mesh sand, no pressure
[18:41:14] <Jymmm> #30*
[18:41:28] <Loetmichel> still its sand
[18:41:33] <Loetmichel> and grinding like hell ;)
[18:41:45] <Loetmichel> its called "sandpaper" for a reason ;)
[18:41:59] <Jymmm> Loetmichel: But no paper involved, so I'm good ;)
[18:42:06] <Jymmm> hahaha
[18:42:56] <Jymmm> Loetmichel: I understand, but for this it be far cheaper/simpler just to go buy a new one at the hardware store it it wears out
[18:43:05] <Jymmm> when*
[18:49:21] <andypugh> Are you moving the material, or pressurising it?
[18:50:21] <andypugh> There are two sorts of things called archimedes screw. One type has a tube round it that also rotates. That might work for you, or might not.
[18:52:32] <Loetmichel> andypugh: that one works by gravity and only in a 45° angle to the horizon
[18:52:41] <andypugh> https://www.youtube.com/watch?v=hFCBe0SvUWM
[18:52:46] <Loetmichel> about 45°
[18:53:32] <andypugh> The classical one needs a good seal between the screw and the tube, and that seems unlikely with water.
[18:55:01] <Sync> it is interesting how bad the seal can be
[18:55:05] <Tom_itx> typically snow blowers will use a rubber flap where otherwise metal would meet metal
[18:55:07] <Sync> the waste water plant here has two
[18:55:13] <Sync> and they run a 2cm gap
[18:55:46] <Tom_itx> they are dealing with larger solids too
[18:56:45] <andypugh> Have you seen this? https://www.youtube.com/watch?v=Fo31_3UzTTY
[18:57:33] <Tom_itx> i'm not entirely sure but didn't they try that in the artic?
[18:58:44] <Sync> the russians built a few of them
[18:58:48] <Tom_itx> wonder how it would do on water
[18:59:26] <Sync> it works™
[20:09:50] <Jymmm> Birdy Express... https://www.youtube.com/watch?v=sDa3muSF3fE
[20:47:02] <andypugh> I wonder what power I can run a 25W resistor at for 1 second?
[20:48:32] <archivist> I have seen them pop at about 5 seconds
[20:49:20] <archivist> my braking resistors popped at switch on of a vfd
[20:53:33] <Tom_itx> 25 watt seconds?
[20:54:27] <Tom_itx> A Watt second is a unit of energy, equal to a Watt of power expended for a duration of one second. It's precisely equal to a newton meter or a Joule.
[20:55:40] <Tom_itx> 25 Joule
[20:56:59] <andypugh> I guess that from that I can work out the temperature rise, and compare that to the operating temp at rated power
[20:57:10] <andypugh> If I knew the mass of the resistor.
[20:58:53] <Tom_itx> it should be at it's max operating temp at given power rating?
[20:59:48] <Tom_itx> beyond that it may become a light bulb or fuse
[21:09:26] <Tom_itx> https://www.udemy.com/cnc-programming-for-beginners/
[21:09:27] <Tom_itx> hmm
[21:10:15] <renesis> andypugh: depends on ambient
[21:10:37] <renesis> and what you mean by run
[21:12:33] <andypugh> One one second operation per day.
[21:12:43] <renesis> and yeah usually when you do the thermal math for a resistor, the max rating matches up with the C/W spec at 25C ambient
[21:13:06] <renesis> meaning in most conditions, where ambient is higher because of other components, they wont do rated power
[21:13:31] <andypugh> Anyway, time to cal it a night
[21:13:34] <renesis> if you put two next to each other, the operating temp of one effectively becomes the ambient temp of the other, and the derating is pretty silly
[21:49:27] <zeeshan|2> some action shots from today
[21:52:25] <zeeshan|2> http://imgur.com/a/xHzVy
[21:52:28] <zeeshan|2> =D
[22:43:52] <Tom_itx> what are you planning to cast?
[22:48:05] <Jymmm> ingots =)
[22:48:40] <Tom_itx> Jymmm, what blockers do you use on FF
[22:48:49] <Jymmm> ABP
[22:49:22] <Jymmm> Tom_itx: ABP, but I have a heavy filter list too.
[22:49:47] <Tom_itx> to allow or disallow?
[22:50:21] <Jymmm> disallow, It annoys me when things load in the background or from 3rd party sites.
[22:51:37] <Tom_itx> care to share it?
[22:52:39] <Jymmm> holy shit, it's 2MB
[22:52:57] <Tom_itx> the short list is fairly lengthy
[23:13:00] <zeeshan|2> Tom_itx: car parts
[23:13:00] <zeeshan|2> :D
[23:27:04] <Flipp_> random question: anyone know any resources for learning mechanical linkage design/path synthesis?
[23:29:50] <Tom_itx> http://web.mit.edu/2.75/fundamentals/FUNdaMENTALs%20Book%20pdf/FUNdaMENTALs%20Topic%204.PDF
[23:31:16] <Tom_itx> https://www.quora.com/What-are-some-good-software-that-can-be-easily-used-to-do-synthesis-in-kinematics-of-machines-and-to-design-a-mechanism-for-a-2nd-year-mechanical-student
[23:35:47] <zeeshan|2> thing i was wondering about with the kiln
[23:35:52] <zeeshan|2> the nichrome wire is straight up exposed
[23:35:55] <zeeshan|2> so if you touch it with a tong
[23:36:00] <zeeshan|2> im assuming you get a 240v shock
[23:36:10] <Tom_itx> the path is closed
[23:36:15] <Tom_itx> but i wouldn't test it
[23:36:20] <zeeshan|2> well think about it like this
[23:36:32] <Tom_itx> it is a long resistor
[23:36:48] <zeeshan|2> L1----------------------> naked wire ----------> resistor -------> L2
[23:36:51] <zeeshan|2> if you touch the naked wire
[23:36:53] <zeeshan|2> you become the new path
[23:37:21] <Tom_itx> test it
[23:37:24] <zeeshan|2> no
[23:37:25] <zeeshan|2> :-)
[23:37:34] <zeeshan|2> i can test it with a volt meter
[23:38:57] <zeeshan|2> Tom_itx: then again if you think of heating coil
[23:39:02] <zeeshan|2> a lot of them are exposed on stoves
[23:39:03] <zeeshan|2> same concept
[23:39:07] <zeeshan|2> yo udont get shocked
[23:39:12] <Tom_itx> uh huh
[23:39:20] <zeeshan|2> but i think its got a ceramic outer layer
[23:39:30] <Tom_itx> possibly
[23:42:37] <zeeshan|2> tom fix my kiln!
[23:44:38] <zeeshan|2> i wonder why ladles are round
[23:44:40] <zeeshan|2> and not square
[23:44:48] <zeeshan|2> stability?
[23:47:08] <McBride36> easier to clean a curve than a corner
[23:47:43] <zeeshan|2> yes but i could chamfer is
[23:47:46] <zeeshan|2> like 1/2" chamfer
[23:47:59] <zeeshan|2> tyrying to get the most capacity out of my kiln
[23:49:20] <Tom_itx> what's wrong with your kiln?
[23:49:38] <zeeshan|2> http://imgur.com/a/xHzVy
[23:49:42] <zeeshan|2> look @ second pic
[23:49:47] <zeeshan|2> or even 3rd
[23:49:53] <zeeshan|2> notice how the top firebrick is collapsing
[23:49:57] <zeeshan|2> i want to put them back up!
[23:50:23] <Tom_itx> so fix it
[23:50:26] <zeeshan|2> how
[23:50:36] <Tom_itx> is there a front to it?
[23:50:40] <zeeshan|2> yes
[23:50:59] <zeeshan|2> im not sure how to stick it up :P
[23:51:03] * McBride36 thought you were talking about soup ladles
[23:51:13] <zeeshan|2> lol McBride36
[23:53:34] <Tom_itx> can you take those brick out?
[23:54:18] <zeeshan|2> if i tried hard enough yes
[23:54:24] <zeeshan|2> i wonder if there is some adheisve
[23:54:27] <zeeshan|2> that will allow me to stick em
[23:54:31] <zeeshan|2> to the top metal piece
[23:54:39] <Tom_itx> re seal them with firebrick mortar?
[23:56:29] <zeeshan|2> is it sticky
[23:56:36] <Tom_itx> https://store.schoolspecialty.com/OA_HTML/ibeCCtpItmDspRte.jsp?minisite=10206&item=501232&gclid=CMK9qfnAxskCFZOCaQodOzEPcQ
[23:56:38] <zeeshan|2> yorue saying if i use firebrick mortar
[23:56:43] <zeeshan|2> it'll not sag like that
[23:56:50] <zeeshan|2> cause itll hold the bricks together more sturdy
[23:57:13] <Tom_itx> i'm not saying. i've never tried to repair one
[23:57:17] <zeeshan|2> me either
[23:57:21] <zeeshan|2> but i think logically that makse sense
[23:57:26] <zeeshan|2> cause i dont think an adheisve is going to hold it up
[23:57:30] <Tom_itx> fill the gap
[23:57:40] <Tom_itx> i don't either
[23:57:50] <zeeshan|2> luckily its coallpsed on itself
[23:57:54] <zeeshan|2> so its actually still sealing :)
[23:58:12] <Tom_itx> or replace with new firebrick
[23:58:16] <Tom_itx> cut to fit
[23:58:17] <zeeshan|2> no!
[23:58:19] <zeeshan|2> it looks nice!
[23:58:34] <zeeshan|2> Tom_itx: its some cool experience melting stuff
[23:58:38] <zeeshan|2> i wish i could melt brass and steel
[23:58:43] <zeeshan|2> then id feel the power of the sun in my hands
[23:58:57] <Tom_itx> or in your boot
[23:58:59] <zeeshan|2> last time icast something was at school
[23:59:12] <zeeshan|2> in technical college, one of my technical electives
[23:59:20] <zeeshan|2> we got to pour ourself a beer mug made out of al
[23:59:29] <Tom_itx> http://www.paragonweb.com/Kiln_Pointer.cfm?PID=365