#robotics | Logs for 2016-11-09

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[00:14:56] <rue_house> https://www.youtube.com/watch?v=fGjHi9lyioE
[00:16:12] <orlock> rue: So, are you going to start building a wall?
[00:16:16] <orlock> THE AMERICANS ARE COMING!
[00:20:44] <rue_house> hahah 215 vs 244?
[00:20:45] <rue_house> hahah
[00:22:28] <rue_house> in the usa, do they call it fail is there isn't more than a particular difference? or can 1 person decide the president?
[00:23:53] <orlock> Wow, i googled something and the top response was an angelfire site?
[00:24:36] <orlock> rue_house: nah, they win or loose a state, and each state has a certain amount of votes, those are the ones that actually matter
[00:26:49] <rue_house> hahah look at the DROP today in the usd!
[00:32:52] <rue_house> I FOUND MY GOGGLES
[01:29:37] <rue_house> it wasn't a crash! it was an unanticipated file system check...
[01:30:18] <rue_house> I suppose I shouldn't consider starting a 6 hour coding spree at 11pm
[01:37:21] <rue_bed> Tom_L, I was actually doing fine with a carbide wood bit on steel till I jogged into the workpeice
[01:37:27] <rue_bed> with lathe
[01:37:56] <rue_bed> iirc the cutter went wizzing past my head, I was upset, cause I was almost finished the project
[01:38:38] <rue_bed> I should get ma to look out for router bits at garage sales
[10:04:15] <blib> anyone here? I'm looking for some recommendations for good depedable motors (around 300rpm) - 12v, torque > 30kgf-cm
[10:58:10] <blib> anyone here?
[11:00:34] <robopal> you
[11:02:40] <blib> hi robopal
[11:02:41] <robopal> blib, just look through some catalog for the torque you want, first search for 12V gearhead motor, then go to about 300rpm you require
[11:02:57] <robopal> thats how I would go about it
[11:03:07] <blib> robopal: Banebots vs vex motors - which one?
[11:03:33] <robopal> dont have an opinion on that
[11:05:02] <blib> robopal: http://www.banebots.com/product/M7-RS775-12.html - gear it down 20:1, and it will work for my specs?
[11:05:28] <blib> http://www.banebots.com/product/M5-RS555-12.html - or this one
[11:06:55] <blib> robopal: if I get a 12000 rpm motor and gear it down to 300rpm , that is not a good use of power, right?
[11:08:01] <robopal> I cant answer that
[11:14:27] <robopal> blib, I see listing for 12V gearbox motor 300rpm on amazon
[11:14:39] <robopal> I can't see anything as high as torque as you want yet
[11:15:31] <robopal> I think you need more voltage for that
[11:18:13] <blib> robopal: I'm confused. What am I doing wrong
[11:18:35] <blib> Power = Torque(Nm) * 2pi * rpm
[11:18:39] <blib> am I right?
[11:20:37] <Snert_> might also use 2 motors.
[11:20:56] <Snert_> dunno what the mechanical design is but opposite worm drives.
[11:21:20] <blib> Snert_: 313rpm, 3Nm - what is the power of this motor?
[11:21:23] <Snert_> turning on the same gear.
[11:21:36] <Snert_> I'm too lazy to do that math.
[11:21:39] <robopal> http://planetcalc.com/1908/
[11:22:24] <blib> says 98W - I guess I was doing something wrong
[11:22:49] <robopal> blib, equations are below
[11:23:31] <blib> I wasn't dividing by 60 :) Thanks
[11:24:11] <blib> so if I get a 100W motor and gear it down 4x, then my power increases by 4, right?
[11:25:21] <robopal> you generate 4 times the power you put in?
[11:26:15] <blib> k
[11:26:25] <blib> so my current spec is asking for something > 60W
[11:30:14] <blib> robopal: http://www.banebots.com/product/M5-RS550-12.html + gearbox?
[11:31:06] <blib> the gearbox is expensive as hell
[11:31:59] <Snert_> I would get a planetary gear motor...perhaps even a planetary stepper. Mated together, made that way.
[11:32:08] <Snert_> but that ain't an 8buck motor.
[11:32:58] <blib> Snert_: Banebot motor is 8 bucks. The gear (60:1) approx = $100!
[11:33:26] <Snert_> and if you add an encoder to the mix it adds to the price.
[11:33:47] <blib> Snert_: http://www.robotshop.com/en/banebots-p60-gearbox-15-shaft-rs-700-mount-641-no-grease.html
[11:33:57] <Snert_> of course, you can belt drive, or gear drive the encoder.
[11:33:59] <blib> Indeed I am looking for 300rpm + encoder + good torque aq 12v
[11:35:00] <Snert_> http://www.omc-stepperonline.com/geared-stepper-motors-c-4.html
[11:35:38] <Snert_> so many choices.
[11:35:44] <blib> Snert_: If I move from DC to stepper, I'll have to change my control system :(
[11:36:11] <Snert_> is that a bad thing?
[11:36:22] <Snert_> I dunno if a stepper is even appropriate.
[11:36:24] <blib> Snert_: yes, then I've to change my motor controller, and the code
[11:36:36] <blib> blib: its for a rc car application
[11:38:58] <blib> Snert_: http://www.robotshop.com/en/12v-118rpm-9582oz-in-hd-premium-planetary-gearmotor-encoder.html - I want a reliable and more powerful version of this I guess :)
[11:39:42] <Snert_> it might cost 2x as much.
[11:40:12] <blib> Snert_: My budges is exactly 2x
[11:40:24] <blib> but I want more torque, speed and reliabiliy
[11:40:36] <blib> 300rpm, torque and reliable 12v
[11:48:43] <Snert_> wrong channel on that link.
[11:48:47] <Snert_> https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20161109091547&SearchText=planetary+gear+motor
[11:51:12] <Snert_> some of the swiss made maxon motors look plenty tasty.
[11:52:01] <Snert_> be that as it may...there's a camera server down in my part of the planet so time2run.
[11:52:50] <blib> Snert_: 775pro looks decent?
[11:54:02] <Snert_> sorry gotta run to the valley and fix a server.
[14:23:53] * z64555 looks at his soldering station and wonder's why the switch is upside down
[14:43:12] <deshipu> https://cdn.hackaday.io/images/3515461478722336140.jpg
[14:43:16] <deshipu> pimped up my bot a bit
[15:03:15] <z64555> neat
[15:10:03] <robopal> haha nice
[21:13:08] <anonnumberanon> sup
[21:13:31] <rue_house> hhah love it
[21:14:01] <rue_house> OH DEAD GOD LOOK AT THOSE CHEAP MOTORS
[21:14:52] <rue_house> OH THEIR tiny.
[21:16:36] <rue_house> https://www.aliexpress.com/item/5V-12V-DC-Brushless-Driver-Board-Controller-For-Hard-Drive-Motor-3-4-Wire-New/32700019464.html?spm=2114.01010208.3.159.EBmf9Z&ws_ab_test=searchweb0_0,searchweb201602_2_10091_10090_10088_10089,searchweb201603_1&btsid=baff6340-f086-4dba-ab4a-dd57559e7c5c
[21:16:39] <rue_house> erp
[21:56:47] <rue_house> !!!
[21:57:31] <rue_house> if I take a smooth pipe, and cast an aluminum bushing around it, I can drill a hole up to the pipe and pump it grease to break it free, then slide it off the pipe
[21:58:17] <rue_house> or use the high pressure hydraulic hand pump I have
[21:59:05] <orlock> maybe some strategic heating and cooling too?
[21:59:19] <rue_house> armyofevilrobots, ok, I'v asked everyone else, and your the only person I dont have an answer from, did you drop off a 2 ton press at my place?
[22:00:14] <rue_house> its going to drive me crazy, almost nobody knew I was looking for one
[22:01:36] <orlock> rue_house: Back when i was into wireless stuff 10+ years ago, somebody left a dish at my front door
[22:01:46] <rue_house> hehe
[22:02:10] <rue_house> people drop stuff off here, and I dont get the chance to thank many of them
[22:02:21] <rue_house> its an awesome arbour press
[22:02:33] <rue_house> I would have been happy to get a 1 ton
[22:06:02] <rue_house> so, I wonder if the usd is gonna fly or crash
[22:06:29] <rue_house> the powers that be are doing a really good job of holding the canadian dollar steady against it
[22:08:50] <rue_house> theBear, can you help me get an au bank account?
[22:09:05] <rue_house> how the hell do people get off shore bank accounts...
[22:12:40] <armyofevilrobots> @rue_house Nope.
[22:12:45] <armyofevilrobots> BUt, congrats?
[22:13:29] <armyofevilrobots> (on the arbour press)
[22:16:13] <rue_shop3> ITS GOT A CNC CUT H DIE IN IT!!!
[22:16:16] <rue_shop3> whoooooo
[22:16:53] <rue_shop3> I just dont get it, nobody would could have given me this knew...
[22:22:36] <z64555> rue_shop3: you sure you didn't buy it yourself?
[22:22:59] <rue_shop3> no, I couldn't find one I liked
[22:23:10] <rue_shop3> for a price that worked and that I could get
[22:23:11] <z64555> who all did you talk to about it
[22:23:15] <rue_shop3> instead, one just turned up
[22:23:18] <rue_shop3> a really good one
[22:24:24] <rue_shop3> I talked to armyofevilrobots, kb1kanobe, mom, james, and moon, and kb1's dad... there isn't really anyone else who knew and could have
[22:24:56] <rue_shop3> and the son of sam
[22:25:05] <rue_shop3> I think I asked him
[22:25:14] <rue_shop3> its proplexing
[22:36:50] <rue_shop3> HA HA HA HA I found something google cant do, go into its units converter by searching for 1inch in mm, then in the left side (input) type ONE
[23:43:09] <Snert> you're saying google cannot convert 1" to millimeters?
[23:44:24] <Snert> 1" = ? mm <----- works for me.
[23:44:48] <Snert> I would never think of spelling out the number one though.
[23:45:06] <Snert> so I've never had any problems with google conversions.
[23:46:24] <rue_house> no, I'm saying that it can handle 3/4 but it cant handle "one"
[23:47:52] <rue_house> huh, it can handle ONE math operation
[23:48:11] <rue_house> oh, no, it can only do division
[23:49:02] <Snert> you google abuser, you.
[23:49:09] <Snert> be very ashamed.
[23:49:29] * rue_house smiles and giggles
[23:57:30] <z64555> leave it to rue to break things
[23:57:34] <z64555> :3
[23:57:55] <rue_house> so, at this point, I can completely redo my old cnc machine
[23:57:57] <Snert> prolly responsible for trump getting elected too.
[23:58:08] <rue_house> which means that all my old custom cnc files are buff
[23:58:29] <rue_house> and my program for height profiling images goes punk
[23:58:40] <rue_house> and otherwise means I can do anyting