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[02:34:08] <MrCurious> seems a bit dead here since a year or two ago
[02:35:20] <robopal> hi
[02:35:28] <MrCurious> hi
[02:35:34] <robopal> where are you from, what are you doing?
[02:35:53] <MrCurious> in california. reading the web
[02:36:19] <MrCurious> just played with a new NUC and got Asus i3 nuc + (3) playstation eye webcam. 320x240 @ 187FPS
[02:36:44] <MrCurious> also got the realsense r200 working with it nicely
[02:37:14] <robopal> r u building a robot?
[02:37:17] <MrCurious> need to benchmark their actual power draw
[02:37:22] <MrCurious> who isnt...
[02:37:37] <robopal> what kind?
[02:38:09] <MrCurious> 4 wheel omni bot. 2 lidars, a realsense r200, kinect 1, other shit
[02:38:43] <MrCurious> and a pair of toy $50 arms with 5dof, retrofitted to be positional accurate with teh addition of 2 magnets and a hall effect sensor
[02:38:50] <MrCurious> per motor
[02:39:37] <MrCurious> this is so tempting...
https://t.co/3SIyBk6Yxo
[02:40:32] <MrCurious> robopal: what are you building
[02:40:59] <robopal> nothing
[02:41:15] <robopal> hold on a sec, im busy
[02:41:56] * MrCurious wanders away
[03:43:53] <pokmo> hi
[03:44:45] <pokmo> does anyone know of a good way for attaching a 5mm pin on a 30mm wheel so that the pin itself could freely rotate?
http://i.imgur.com/xNe84jt.png
[03:45:07] <Jak_o_Shadows> Boring old clearance fit?
[03:45:27] <pokmo> Jak_o_Shadows, but how to keep the pin from shifitng?
[03:46:14] <pokmo> cotter pins?
[03:46:24] <Jak_o_Shadows> eh, something like that
[03:47:23] <pokmo> but cotter pins leave a pretty large gap, right
[03:48:01] <Jak_o_Shadows> well, wat are you actually doing?
[03:50:41] <SpeedEvil> a bearing
[03:51:15] <SpeedEvil> http://www.ebay.co.uk/itm/MINIATURE-SERIES-METAL-SHIELDED-ZZ-BEARING-/350632413223?var=&hash=item51a3520827:m:mZ3I8E0yADUfBnaT7bQyhKw say
[03:51:21] <SpeedEvil> 605ZZ
[03:51:30] <SpeedEvil> drill a 14mm hole, job done
[03:51:44] <Jak_o_Shadows> I suppose I'm thinking of something more hacky and more who cares about precision
[03:53:06] <pokmo> hmm
[03:53:34] <pokmo> SpeedEvil, you mean embed a bearing in the wheel?
[03:53:43] <SpeedEvil> yes
[03:54:05] <pokmo> i was thinking of using a teflon bushing
[03:54:16] <SpeedEvil> What load/speed/...
[03:54:21] <pokmo> and just loose fit it
[03:54:48] <pokmo> torque is around 0.3N-mm, speed is around 15RPM
[03:55:06] <pokmo> the rod is 4mm in diameter
[03:58:26] <SpeedEvil> teflon or any greased plastic or ... bushing
[03:58:33] <pokmo> yeah
[03:58:42] <SpeedEvil> Or if it's a plastic gear, maybe just grease
[03:58:59] <pokmo> but i'll need to prevent the bushing/rod from sliding
[03:59:07] <pokmo> yeah it's a nylong gear
[03:59:11] <pokmo> *nylon
[03:59:30] <pokmo> just two cotter pins and grease will do?
[03:59:34] <pokmo> with no bushing?
[03:59:46] <SpeedEvil> I would think so, possibly yes
[04:00:03] <pokmo> but the cotter pins could rub against the gear, right
[04:00:32] <pokmo> well, i was thinking of using R-clips
[04:02:47] <pokmo> should the gear's body be greased too?
[04:10:44] <SpeedEvil> pokmo: yes, it rubs against the gear. But at 15RPM, and 30mm, the speed is 3mm/s or so, and the wear is almost negligible
[04:11:37] <pokmo> okay!
[04:11:56] <pokmo> thanks
[13:30:36] <flyback> http://realterm.sourceforge.net/
[14:25:12] <goppo> hi
[14:25:19] <goppo> how are roll pins meant to be used?
[14:25:51] <goppo> if the diameter is 2mm, should the bore on the rod be <2mm?
[14:31:00] <robopal> what bore?
[14:31:50] <goppo> robopal: as in, the hole for the roll pin to be inserted into
[14:32:29] <robopal> same diameter
[14:32:35] <goppo> basically, i'm trying to stop a metal 3mm rod from shifting. i thought it might be a good idea to use a rolling pin
[14:33:40] <goppo> robopal: but if the whole was the same diameter as the pin, the pin won't be compressed
[14:33:50] <goppo> and it won't push against the wall of the hole, right
[14:34:06] <robopal> got a picture?
[14:34:17] <robopal> I must be thinking of something else
[14:34:44] <goppo> robopal:
http://www.grfasteners.com/docs/images/products/spring-pins.JPG
[14:35:21] <robopal> ok
[14:36:24] <robopal> you want to stop the rod from shifting along its axis or not be able to rotate?
[14:37:03] <goppo> robopal: i actually have a gear that drives a pin like a crank. but i also like the crank to freely rotate on its axis
[14:37:28] <goppo> robopal: so i thought i'd need a way to prevent the pin from shifting longitudinally
[14:38:26] <goppo> i thought about using circclips but they can be hard to install in tight spaces
[14:39:03] <goppo> so i thought i might have a roll pin on each side of the gear rather
[14:42:09] <robopal> ah I was about to tell you about circlips
[14:42:12] <robopal> ok then
[14:42:27] <goppo> well, i was thinking about e clips
[14:42:49] <goppo> robopal: why not roll pins?
[14:42:53] <robopal> but with the roll pin, the rod won't turn, rigth?
[14:43:15] <goppo> robopal: well, the crank pin is supposed to freely rotate on its own axis as well
[14:43:47] <goppo> the gear drives the pin like a crank, and the pin itself can freely rotate
[14:45:45] <robopal> I can't understand how it works, sorry :D
[14:46:27] <goppo> robopal: simply ===|=[]=|=== where === is the rod, | is the roll pin, [] is the gear
[14:47:48] <robopal> ok so you want to use it as a bushing to increase the diameter of the rod
[14:48:33] <goppo> robopal: no, not to increase the diameter, but to block itself from shifting
[14:49:00] <robopal> ah | is vertical to the rod??
[14:49:06] <goppo> robopal: perpendicular
[14:49:24] <goppo> like how an e clip would be used
[14:49:51] <goppo> except, it protrudes through the rod
[14:50:11] <robopal> how large is the rod?
[14:50:27] <goppo> robopal: 3mm in diameter
[14:51:29] <goppo> i wonder why e clips are so often used
[14:51:43] <robopal> puting a pin in each side of the gear, does it involve drilling a hold on the rod?
[14:51:45] <goppo> as a stopper
[14:51:51] <goppo> yeah
[14:52:04] <robopal> how can you do that
[14:52:14] <robopal> 3mm diameter
[14:52:47] <robopal> what size hole, what rolling pin will you use, how can the rod survive and not snap?
[14:52:58] <goppo> probably a 1mm pin
[14:53:01] <robopal> thats why they put e clips
[14:53:37] <robopal> actually
[14:54:00] <goppo> a 3mm rod with a 1mm bore will still have 1mm wall on each side though
[14:54:08] <robopal> thats exactly the setup of the gear assembly of my rc truck
[14:54:21] <goppo> robopal: have you got a pic?
[14:54:44] <robopal> hold on trying to find
[14:55:08] <goppo> i wonder how big your truck's rod is
[14:58:33] <robopal> http://www.produktinfo.conrad.com/datenblaetter/275000-299999/292826-an-01-ml-Mercedes_Benz_1850L_de_en_fr.pdf
[14:58:37] <robopal> page 11
[14:58:53] <robopal> and 12
[15:04:40] <robopal> doesnt say, but I think it is larger than 3mm
[15:08:13] <robopal> something like .7 or .8 i think, I cant take it out and measure it
[15:09:03] <robopal> (I forgot how large this truck actually is, I just pull it down from storage, also full of dust... :P)
[15:09:40] <robopal> http://myrobots.gr/current.html
[15:10:17] <robopal> I prety much abandonned everything after that because of work and stuff.. :-(
[15:11:53] <goppo> interesting
[15:16:38] <goppo> robopal: maybe i'm missing something, but i only see circlips used
[15:18:41] <robopal> yes
[15:19:28] <goppo> i wonder why roll pins are so underused
[19:57:46] <veverak> http://www.thingiverse.com/thing:1318414
[19:57:48] <veverak> !!!!
[19:57:50] <veverak> :D
[20:03:26] <Jak_o_Shadows> That's quite neat
[20:03:31] <DagoRed> very
[20:09:14] <flyback> monteCANUCK
[20:09:15] <flyback> monteCANUCK
[20:09:33] * flyback punts Montezuma
[20:13:26] <Montezuma> quite so
[20:13:56] <Montezuma> representing bloodthirsty-yet-apologetic robots across the entire great white north
[20:28:08] <Montezuma> Anyone back any disappointing robotics projects on Kickstarter in the last 3 years?
[20:34:24] <Jak_o_Shadows> Nope
[20:34:31] <Jak_o_Shadows> Have there been any non-disappointing?
[20:37:41] <Montezuma> Good point
[21:00:50] <rue_shop3> mmm need to get more wok done on th e mecha
[21:01:46] <rue_shop3> anyone know a good 0-40psi pressure sensor in the order of like... $3 or less?
[21:02:47] <Tom_itx> oil pressure sensor
[21:02:48] <Tom_itx> auto
[21:03:10] <rue_shop3> $3 or less?
[21:03:18] <Tom_itx> maybe
[21:07:08] <rue_shop3> im pretty sure most of them are pressure switches
[21:07:34] <Tom_itx> seems the cheap ones are
[21:16:01] <rue_shop3> anyone know a good 0-40psi pressure sensor in the order of like... $3 or less?
[21:16:07] <rue_shop3> :)
[21:17:27] <Jak_o_Shadows> What'd you use for the prototype?
[21:17:59] <rue_shop3> im messing with an air muscle and a pot
[21:21:31] <Tom_itx> http://www.newegg.com/Product/Product.aspx?Item=9SIA7BF2K28399&nm_mc=KNC-GoogleMKP-PC&cm_mmc=KNC-GoogleMKP-PC-_-pla-_-Eco+Gadgets-_-9SIA7BF2K28399&gclid=CN6Y68if3csCFQoNaQodwqAIGA&gclsrc=aw.ds
[21:21:47] <Jak_o_Shadows> tyre air pressure sensors?
[21:22:16] <rue_shop3> 40 psi not kpa...
[21:22:39] <Tom_itx> there's a difference?
[21:23:16] <rue_shop3> factor of about 4, yea
[21:23:37] <Tom_itx> you can work with that.... you're rue_mohr
[21:24:36] <Jak_o_Shadows> Something like
http://www.ebay.com.au/itm/Keychain-LCD-Digital-Tire-Tyre-Air-Pressure-Gauge-For-Car-Auto-Motorcycle-SM-/161787861865?hash=item25ab4edb69:g:y04AAOSwMmBVxagf has the range you need.
[21:26:13] <rue_shop3> now I think your onto something
[21:33:41] <rue_shop3> @2.41ea x 4, 100psi range, I'll try it
[21:33:50] <rue_shop3> thanks!
[21:43:18] * theBear squints slightly and puts two fingers gently up on his forehead just outside his right eye
[21:44:22] <theBear> that was only 50-psy range, i assume you had the old "it was like 1000 tiny voices screaming out in terror, and then all simultaneously being suddenly silenced" inside your head kinda sensation ?
[21:45:20] <theBear> suffice to say, 100psy could LITERALLY blow someone's mind even if they on the opposite side of the planet at the time, and even i dare not take those kinda chances
[21:52:57] <rue_shop3> :)
[21:53:05] <rue_shop3> the muscles only operate up to about 40 psi
[22:07:18] <Tom_itx> do they pop then?
[22:07:31] <Jak_o_Shadows> maybe distort too much?
[22:21:39] <DagoRed> Lol
[22:22:09] <DagoRed> theBear: I've met some psy people. They have mostly been strange as hell.
[22:25:17] <rue_shop3> I got 4, so I'll see how they work
[22:32:31] <Jak_o_Shadows> Good luck
[22:42:59] <rue_shop3> hahaha FIRST TIME EVER
[22:43:12] <rue_shop3> I finished a crazy glue BEFORE the tube went off!
[23:06:48] <rue_shop3> ugh
[23:06:57] <rue_shop3> modifying 15 gearboxes to have an output shaft
[23:07:08] <rue_shop3> how did I end up with 15 of the same gearbox from a printer?
[23:08:17] <flyback> BMCC
[23:08:23] * flyback attaches jato to rue_shop3
[23:09:28] <rue_shop3> its BMSMA you idiot
[23:09:52] <flyback> no it's BITE MY "CANUCK"..............................................CANUCK
[23:10:01] * flyback HEADBUTTS rue_shop3
[23:10:19] <flyback> another one
[23:10:23] * flyback bites LordByron
[23:10:35] <rue_shop3> well I have 15 low speed gearboxes
[23:10:42] <flyback> high torq?
[23:10:45] <flyback> form what?
[23:10:51] <rue_shop3> good for direct drive of robot axes or the like
[23:10:55] <rue_shop3> from printers
[23:11:00] <rue_shop3> was putting output shafts on them
[23:11:07] <flyback> what kind of gears?
[23:11:12] <rue_shop3> plastic
[23:11:15] <flyback> nylon?
[23:11:17] <rue_shop3> POM
[23:11:28] <flyback> hmm I think that's a good plastic I can't remember
[23:14:05] <flyback> oh acetal
[23:14:06] <flyback> good shit
[23:14:17] <flyback> and delrin
[23:16:09] <flyback> just be careful what it's exposed to
[23:16:21] <flyback> use the proper lubericants recommended for delrin
[23:18:01] <flyback> it's got some sensitivies to some chemicals
[23:18:05] <flyback> other than that good plastic
[23:25:29] <rue_house> the grease that was on it reacted REALLY funny to the crazyglue
