#robotics Logs

Apr 19 2014

01:52 rue_more "my memory is like a siv, it manages to hold onto the big stuff"
01:54 rue_more 11:30, fine to play "jumpin jumpin", at home coding robots
01:54 rue_more armyofevilrobots, I'm sorry I dissapeared from existance for a while
03:00 armyofevilrobots No worries, we disappeared from sober for a while.
03:00 armyofevilrobots that doesn't even make any sense. We did play cards and drink for a bit tho.
03:06 GargantuaSauce took a vacation, to the land of drunk
03:08 MjrTom you had a drunk
10:18 password2 Hi
10:39 password2 What is the maximum step rate of most steppers 1000steps/second?
10:41 password2 I'm designing my own driver as an excersize and was thinking 10khz step rate is a bit high
10:57 rue_mohr it depends on the motor and the driver
10:57 rue_mohr if you have a good driver, its pretty high
11:01 rue_mohr powers out
11:01 rue_mohr :(
11:21 password2 ok
15:07 MrCurious for any who missed this... http://digg.com/video/check-out-these-awesome-miniature-magnetic-swarming-robots
15:16 rue_house yea
15:17 rue_house its all about the surface their on from what I can telll
15:18 rue_house so they aren't robots, they are just devices moved by the surface they are on
15:19 MrCurious still, damn useful
15:19 MrCurious and removes the issue of moving the power source with the device
15:19 rue_house I'm not sure hwo they got 3d (rotation and 2 translational) axies
15:20 rue_house I only see traces in one direction
15:20 rue_house pretty sure they cant completely independantly operate them
15:21 rue_house I dont think they can have 2 in the same control space without them doing the same moves
15:24 robopal mike, the uk guy did a short video on this to demonstrate the principle
15:25 robopal https://www.youtube.com/watch?v=7_Wh6i8Hb6c
15:34 rue_house *blink*
15:34 rue_house uh
15:34 rue_house hows that working?
15:34 e_house th
15:35 MrCurious a flowing electric current emits a magnetic field perhaps
15:36 rue_house hmm really?
15:37 rue_house I'm thinking about polarities and things
15:37 rue_house I think the first video illudes that they are much fancier than they really
15:37 rue_house are
15:38 rue_house that turn the one does? I think its a dedicated turn strip
15:39 rue_house a person could recycle phases too
15:39 rue_house hmmmmmm
15:40 MrCurious layered traces that it runs on
15:40 rue_house yea
15:40 MrCurious could make for a x-y magnetic matrix
15:40 rue_house oen for x one for y, one for turns
15:40 rue_house a 10 layer board could go far :)
15:41 MrCurious i imagine with x-y you wouldnt need a turn track
15:41 rue_house you do, you cant do controlled turns
15:41 rue_house so I think ;)
15:45 rue_house https://www.youtube.com/watch?v=2d5MezJXdJE
15:46 rue_house http://nanolab.me.cmu.edu/projects/ReconfigurableMicroModules/
15:46 rue_house I better do some recycling
15:46 rue_house bbl
17:02 rue_house ok, I ahve to work out the real timing range for the servos on my arm, and adjust the servo driver firmeware
21:01 rue_house hmm I need an acceleration profiler
21:01 rue_house trapazoidal
21:01 rue_house I have a liear progression of points
21:02 rue_house and I can control the time between them
21:03 rue_house I know how many slices there are
21:04 rue_house hmm need a good realtime position editor
21:05 rue_house why is 0 after 9, is this a roman keyboard?
21:05 rue_house did someone get rid of all the rebels?
22:45 rue_house its when you hit compile, it does, and you cringe...
22:46 rue_house ok, realtime robot control
23:05 rue_house hahaha this is great fun
23:19 rue_house http://youtu.be/tlFo9bbvUiw
23:20 GargantuaSauce awesome
23:20 rue_house now I'm gonna make it put it back
23:20 rue_house then repeat
23:20 GargantuaSauce make it draw something
23:20 rue_house then I'll put it in prison and make it do it forever
23:20 rue_house hah, I have no force control yer
23:21 rue_house and generating points is a pain
23:21 rue_house I have a waldo I'll work on setting it up with later
23:25 rue_house hah, putting it back didn't go so well
23:34 GargantuaSauce i take it its repeatability isn't too awesome?
23:34 GargantuaSauce or does the gripper not precisely drop it
23:34 rue_house both
23:34 rue_house I'm giving it some better motions to work with now
23:35 GargantuaSauce do you have some means for realtime input to it? even a joystick would probably help matters a lot
23:35 rue_house I just set up a keybaord realtime controller
23:40 rue_house being able to just grab and move it would be nice
23:40 rue_house maybe with the next robot
23:41 rue_house the model arm controller I have dosn't have any gripper or wrist provisions
23:41 GargantuaSauce how about 5 pots on a box?
23:41 rue_house running a point list is nice, but some scripting where I can output things and wait for inputs would be nice
23:42 rue_house GargantuaSauce, I have a 'waldo' with 3 pots in an arm config
23:42 rue_house but like I say its 3 axies short
23:42 GargantuaSauce also cant you just disable the pulse output for a user-specified period and then use the position detection technique you keep describing to me?
23:43 rue_house yea
23:43 rue_house but I'm not sure how far I want to go with this hardware
23:43 rue_house it IS a hack
23:43 GargantuaSauce i am astonished to hear that coming from you!
23:44 GargantuaSauce and its not like there won't be software coming out of this that'd be useful for the next version with proper motion control
23:44 rue_house maybe I can think of a song and make it dance to some music
23:45 rue_house indeed
23:49 GargantuaSauce i should really start working on my servos
23:51 rue_house I should get back to work on my power supply and my real arms
23:51 GargantuaSauce real arms?
23:52 rue_house yea, the ones made with gearmotors, that can lift more than 300g
23:53 rue_house the ones that have a 4 foot reach
23:57 GargantuaSauce sounds like it'd be nicer to be punched in the face by this one during development
23:59 rue_house and dispote that I'm staying clear of the work area...