#robotics Logs

Jun 10 2018

12:07 AM rue_shop4: yea, if you use standard glass, its almost garunteed warped
12:11 AM rue_shop4: it took me 6 layers of tape to level up one peice I had
12:11 AM rue_shop4: mirror is always flat
12:11 AM rue_shop4: save yourself the trouble, get a mirror in the first place
12:11 AM rue_shop4: ok I just bought 50 of those **(*^(*%*& damned 11 pin "PH" connectors for all the stepper motors I have
12:11 AM * rue_shop4 carves up the 12 pin he does have
01:15 AM rue_shop4: zhanx, ARG, I'm trying to ohm out this motor from the adapter cable
01:15 AM rue_shop4: everything is open circuit
01:16 AM rue_shop4: its looks like I'm going to have to plug it into the motor
01:16 AM rue_shop4: :(
01:16 AM rue_shop4: yea, if I plug the cable into the motor I can get a reading, but if I unplug it, everything goes open circuit
01:27 AM rue_shop4: maybe I need a better meter
02:00 AM rue_shop4: ok, I guess I have to work out whats going to the carriage
02:05 AM mrdata_ is now known as mrdata
02:46 AM rue_: http://my.integritynet.com.au/purdic/lc-meter-project.htm
02:50 AM rue_: buy one for $40, or build one for ...
03:00 AM rue_: argkg, its midnight
03:53 PM peepsalot: anyone familiar with old plotter pens, like how they hold the pen precisely but also change out pens with basically just pen up/pen down commands i think? like this https://vimeo.com/111372264
03:54 PM peepsalot: trying to understand the pen holder mechanism and how it changes colors
04:05 PM rue_shop4: I have plotters
04:05 PM rue_shop4: then change pens
04:07 PM Tom_L: https://www.youtube.com/watch?v=i1ZcKoUSlqI
04:09 PM * SpeedEvil imagines an expandable tool-changer that uses juggling as storage.
04:10 PM Tom_L: the website doesn't work
05:07 PM peepsalot: rue_shop4, commercial or DIY machines?
05:07 PM peepsalot: do you have pics, video of the pen changing mechanism?
05:41 PM rue_shop4: its all diy
05:42 PM rue_shop4: wait, the plotters care commercial
05:42 PM rue_shop4: its got a latch it can grab and release the pens
05:42 PM rue_shop4: no electronics, its like a pen
05:42 PM rue_shop4: first click in, second click out
06:26 PM Maya-sama is now known as hackkitten
06:47 PM rue_shop4: ok, the second ring for the robot is tacked togethor, but something is wrong
06:47 PM rue_shop4: its also measuring as 7'9"
06:47 PM rue_shop4: (for those of you who are american and dont understand the imperial system (feet and inches) ' is for feet, and " is for inches)
06:47 PM rue_shop4: should be 7'6"
06:48 PM rue_shop4: so, 7.5' nom
06:48 PM rue_shop4: is 2286mm
06:52 PM rue_shop4: ok, and my cad is out, the nom of the inner ring is 2344
06:53 PM rue_shop4: oops, but the inner is 2286
06:53 PM rue_shop4: ok
06:53 PM rue_shop4: so
06:53 PM rue_shop4: if I play with some terminology, I dont have to do any cutting and rewelding
06:54 PM rue_shop4: according to this the OD is
06:54 PM rue_shop4: 2402mm
06:55 PM rue_shop4: should come out to 7 feet, 10' 9/16"
06:55 PM rue_shop4: 2134234
06:56 PM rue_shop4: should come out to 7', 10-9/16"
06:56 PM rue_shop4: so ~7'10.5"
06:56 PM rue_shop4: sounds about right
07:24 PM rue_shop4: ok, I have a lot of grinding to do sometime
07:24 PM rue_shop4: but thats two rings...
07:33 PM rue_shop4: ok, welder is away
07:33 PM rue_shop4: 5:00 hmm
07:43 PM rue_shop4: need to make a thing for crushing the ends of 1/2" electrical conduit
07:44 PM Tom_L: fishmouth joints
07:44 PM Tom_L: save smashing yer fingers
07:44 PM rue_shop4: waaay too much work
07:44 PM rue_shop4: not just cutting them all, but welding them all
07:45 PM rue_shop4: much less work to squish the end and do a stright weld
07:45 PM Tom_L: or threaded rod thru them all
07:45 PM rue_shop4: trying to keep the outside smooth
07:45 PM rue_shop4: 1/2 the reason for them being round
07:45 PM rue_shop4: track for counterweights
08:15 PM rue_shop4: gee, gerber files look lots like Gcode files
08:22 PM Tom_L: yup
08:42 PM rue_shop4: did you send gerber to china for making baords?
09:45 PM Tom_L: i have before yes
09:45 PM Tom_L: it's a set of files
09:59 PM Tom_itx: .doc - documentation layer RS-274X format
09:59 PM Tom_itx: .cmp - top copper layer
09:59 PM Tom_itx: .sol - bottom copper layer
09:59 PM Tom_itx: .plc - top silk layer
09:59 PM Tom_itx: - no bottom silk layer
09:59 PM Tom_itx: .stc - top solder mask
09:59 PM Tom_itx: .sts - bottom solder mask
09:59 PM Tom_itx: .drd - drill data
10:00 PM Tom_L: that's what i generally sent
10:02 PM Tom_L: and would include that as a readme.txt just in case
10:04 PM Tom_L: some allow thinner traces than others so i had a couple different scripts i used to generate the files
10:16 PM Jak_o_Shadows: How is a battery, a motor, some teensy gears, a little steering assembly, and a battery $200 AUD? https://www.fishpond.com.au/Toys/Faller-163703-Car-System-Chassis-Kit-Faller/4104090637033
10:16 PM Jak_o_Shadows: Oh, it also has a reed switch
10:32 PM Tom_L: must be pretty damn special
10:56 PM Jak_o_Shadows: Yep. Slightly frustrated.
11:27 PM rue_shop4: huh
11:27 PM rue_shop4: Jak_o_Shadows, ?
11:28 PM rue_shop4: did you buy it?
11:28 PM Jak_o_Shadows: ?
11:28 PM Jak_o_Shadows: No
11:28 PM rue_shop4: ok
11:28 PM Jak_o_Shadows: But i'm frustrated that it costs so much, and no knock-offs are available
11:28 PM rue_shop4: how about I sell ya it for $150
11:28 PM Jak_o_Shadows: aha. I as thinking $30.
11:29 PM Jak_o_Shadows: Can't be more than$15 in parts.