#robotics Logs

Apr 08 2013

01:16 MrCurious perhaps php can, but you cant admit it without risking the other programmers beating you up and taking your lunch money...
04:03 Rif makin a new base for motor drivers and stuffs
04:15 Rif the pic http://imagebin.org/253198
04:21 Jak_o_Shadows It'd be so cool to have a cnc and lots of perspex
04:23 Jak_o_Shadows ./acrylic
04:23 Jak_o_Shadows ./plastic stuff
04:23 Rif it still took 45 minutes to do those 2 bits, 6mm thick, but all standoffs are countersunk
04:24 Rif and about 6 hours on weekend to cad it up
04:24 Jak_o_Shadows Lots of holes there.
04:24 Rif all the boards fit, is full now, about 500A of driver continuous
04:25 Jak_o_Shadows lol
04:25 Rif that board is 160A, 500 peak
04:25 Jak_o_Shadows how big is this thing?
04:25 Rif about 80kg so far, 5 foot something
04:26 Jak_o_Shadows that's pretty damn decent
04:26 Rif yes thats why i am taking it slow
04:26 Rif making smaller stuff
04:26 Rif but i am ready to get it goin again
04:26 Rif and take off the castor wheels, thats next task
04:27 Rif balance is so cool
04:27 Rif and if it balances i basically have a segway
04:27 Jak_o_Shadows How heavy are the batteries?
04:28 Rif only got one in there for now, a big marine 200amp odd thing, about 30kg or so?
04:28 Rif had lots, but they are all wrecked
04:28 Jak_o_Shadows Where's the other 50kg lol
04:29 Rif will use RC packs for 5V parts and smaller things
04:29 Rif the base is welded steel, and the top is welded 3mm aluminium
04:29 Jak_o_Shadows ah.
04:29 Rif and decent wheels etc
04:29 Jak_o_Shadows Was thinking, you could practically make it ride on
04:29 Jak_o_Shadows In-fact, make it ride on for small children.
04:29 Rif the drive motors are the same as in scooters
04:30 Rif two people can easiily ride on it, have done that
04:30 Rif remote control
04:30 Jak_o_Shadows No kill like overkill!
04:30 Rif now to make it self aware
04:31 Rif i lost a couple of tables legs and had big holes in the walls last testing
04:31 Rif so will make a testing base for it this time
04:32 Jak_o_Shadows2 You hoon you.
04:32 Rif macined all the little black standoffs as well cause could not find em anywhere
04:32 Rif they are rough but do the job perfect
04:32 Jak_o_Shadows2 those standoffs just for electronic components?
04:32 Rif yeah
04:33 Jak_o_Shadows2 Scrapbooking places have standoofs.
04:33 Rif and to connect the top part, with will have the fans etc
04:33 Jak_o_Shadows2 Although, fibreglass rod would be better I think
04:33 Rif and more electronics upside down if needed
04:34 Jak_o_Shadows2 I got a sample chip from TI today. I can finally use hardware serial on my msp430 launchpad
04:36 Rif cool, i been struggling with serial again
04:36 Jak_o_Shadows2 yeah, now I don't have to screw around with software uart
04:37 Rif will save that for morning though, drinkin and stickin to making things at moment, will get another pic
04:37 Rif msp430, is that a uC?
04:37 Rif i know i should google
04:37 Jak_o_Shadows2 Yeah. Quite cheap, + cheap programmer
04:43 Rif Jak_o_Android, bit of a mockup, just making sure stuff fits http://imagebin.org/253205
04:43 Rif gotta wait for the long standoffs from ali
04:50 Jak_o_Shadows2 cool
05:15 Rif yeah happy with it so far, all fits ok
05:16 Rif will be nice not havin these things short out and bump into each other
05:17 Rif Jak_o_Shadows2, there are alot of hip4081 in that design, and irf1404 fets
05:17 Jak_o_Shadows2 I sampled a HIP4082 recently.
05:17 Rif about 3 different drivers using then in similar ways
05:17 Jak_o_Shadows2 No idea when it'll get here, but i've got some time till I need to do the circuitry
05:17 Rif cool
05:18 Jak_o_Shadows2 I sort of got computer vision working.
05:18 Rif i just ordered a bunch more stuff to repair the drivers i stole stuff from
05:18 Jak_o_Shadows2 Doesn't cope with tiles or carpet too well lol, but it should deal with mdf fine, hopefully
05:18 Rif cool, can you show us what you have done or not really?
05:19 Jak_o_Shadows2 It'll take a few minutes, but yeah.
05:19 Rif and make a few more drivers, have all these pcbs to use up if i can get em workin right
05:47 Rif just put a 3.50 battery in me $5 multimeter, i know i coulda bought another meter but i figure a decent battery might at least last longer
05:48 Rif silly tiny 12v thing
05:54 Jak_o_Shadows2 Rif: imagebin.org/253210
06:07 Rif so wats it lookin at?
06:08 Rif an ants head at about 2mm
06:08 Jak_o_Shadows2 Tiles.
06:08 Jak_o_Shadows2 lol.
06:08 Jak_o_Shadows2 Nah, the diagonal line is picking up the grout line in the tiles.
06:08 Rif i can hardly see anymore
06:08 Jak_o_Shadows2 The bit going straight up is saying that it's clear.
06:08 Rif very nice
06:10 Jak_o_Shadows2 so the yellow is the clear bit, the block in the middle shows me that it's clear to go in the middle
06:11 Rif so you are looking at where you are going before going there, rather than reacting to things that get in your way
06:11 Jak_o_Shadows2 Basically http://www.roborealm.com/tutorial/Obstacle_Avoidance/slide010.php
06:11 Jak_o_Shadows2 but in simplecv with python
06:12 Rif k, is saved open for morning reading, can't read no mroe tonight
09:13 rue_house I want to try using AR glyphys for 3d navigation at some point
09:26 narekb rue_house, what robot will you use 3D nav. in?
14:14 -wright.freenode.net:#robotics- [freenode-info] if you're at a conference and other people are having trouble connecting, please mention it to staff: http://freenode.net/faq.shtml#gettinghelp
14:38 RifRaf yay serial controller to motor controller working
14:39 RifRaf the readme said 33.4k baud, which i realized just before is non standard, so tried 38.4k and all good
22:44 MrCurious rue_house: you around?
22:46 rue_house a round what?
22:46 MrCurious PM'd
23:19 MrCurious ok, all may mock now :) http://rogerunwin.imgur.com/all/
23:38 GargantuaSauce is it...stable?
23:40 MrCurious if i shove it, it doesnt want to fall over
23:40 MrCurious not yet wired though
23:44 GargantuaSauce i kind of suspect that a quick jerk on the controls would make it topple
23:44 GargantuaSauce but i guess we'll see!
23:45 MrCurious the balance point is about 4 - 6 inches up the main shaft
23:45 MrCurious will likely add some weight to the lower section
23:45 MrCurious as i want it to perform rapid motions
23:45 MrCurious and the aluminum is all hollow extrusions