#robotics Logs

May 24 2013

00:02 GargantuaSauce for sport!
01:11 MrCurious and fixed!
01:12 MrCurious arduino's pin D13 can only work as one side of a ping
01:17 MrCurious knocking down the todo's
01:19 MrCurious we have secretly replaced your college professors with republican congressmen... lets watch and see who notices... (and it wont be the texans)
01:19 MrCurious oh god, i am frothing at the mouth again, aren't I
01:48 MrCurious anyone make any tellable progress in the past 24 hours?
01:48 GargantuaSauce yeah reprap upgrade assembly is just about done
01:49 MrCurious pictures :D
01:49 GargantuaSauce just gotta mount and wire the new controller and flash it and the old one
01:49 GargantuaSauce tomorrow
01:51 MrCurious cool
01:51 MrCurious you gonna replicate it for friends?
01:51 MrCurious i.e. print printer parts to boot strap your buds?
01:52 GargantuaSauce i cant get any of my rl friends interested
01:53 MrCurious once you print up ### toy samples for them, they will change their tune
01:53 GargantuaSauce they'll pay lip service to it but arent into it enough to put the time in as a hobby i guess
01:53 MrCurious well you got a gun printer before they got banned
01:54 GargantuaSauce which is frustrating as fuck because i know i'd be way further along in these things if i were to collaborate
01:59 MrCurious now the ping board is done, i have no excuse not to finish the 4 stepper board
01:59 MrCurious its been 90% completed too long!
02:00 MrCurious the mime is an excellent servent, but a terrible master...
02:03 GargantuaSauce wait you're doing locomotion with steppers?
02:04 MrCurious yeah
02:04 MrCurious using 4 easy steppers tied to an arduino nano
02:05 MrCurious because i wanted the arduino to focus more on synchronizing the 4 motors for funky rates to move in any direction
02:05 MrCurious than focusing on going 1 2 3 4 1 2 3 4
02:05 MrCurious and quite frankly, if i can throw $10 at something and save myself a man week
02:05 MrCurious well, enough obvious words
02:07 MrCurious interesting talk http://www.youtube.com/watch?v=SFt7EzpsZQo
02:07 GargantuaSauce i want to slap the audio gu<y
02:08 MrCurious seems like he is on about how to live in the now, and off autopilot
02:08 MrCurious a tricky proposition
02:08 MrCurious took me a long time to wake to taht
02:08 GargantuaSauce especially considering he later killed himself <_<
02:09 MrCurious he did?
02:09 GargantuaSauce says so in the description
02:09 MrCurious yeah, just verified that
02:10 MrCurious everybody worships, but you get your choice what to worship
02:10 MrCurious nice
02:10 MrCurious hello fellow brothers of the shiny
02:11 MrCurious dang, he just called me out
02:17 MrCurious still cant get over this... http://blog.makezine.com/2013/05/13/arduino-controlled-200-robotic-hand/
02:18 MrCurious the bike chain was a great idea
02:21 MrCurious i was thinking having each finger in that design project from a tube as desired. so high fidelity grasping, they would project only minimally from the tubbe, but for gross grasping, they could project completly....
02:22 GargantuaSauce it's definitely cool, i suspect 1DOF fingers with no feedback are of limited usefulness though<
02:22 MrCurious rue_shop3: should make one to put on his arm...
02:23 MrCurious so use small servos and go 3dof per finger
02:23 MrCurious was also thinking perhaps the springs could be replaced by tensioned metal or plastic or rubber
02:23 MrCurious to minimize the finger size
02:24 MrCurious gosh but a 3d printer would be handy for making one...
02:24 MrCurious the thumb is 2dof
02:24 MrCurious guessing the 2 little fingers are coupled
08:49 R0b0t1 I wanna learn me some control theory.
08:49 R0b0t1 None of that practical crap.
08:49 R0b0t1 Where do I start?
08:58 rue_house a gearmtor with a feedback device and a microcontroller that isn't programed in arduinoeese
10:23 ace4016 R0b0t1, modern or classic control?
10:24 ace4016 i prefer working with modern control
10:24 ace4016 state-space type stuff
10:25 ace4016 i feel it's easier to describe and create systems and controllers...and my masters concentrated on it greatly :P
10:43 R0b0t1 ace4016: Modern
10:44 ace4016 how good is your linear algebra?
10:44 ace4016 because you might want to start there
10:45 ace4016 if you are not comfortable manipulating matrices and know the different properties and such of vectors and matrices
10:46 R0b0t1 I will learn linear algebra then
10:48 ace4016 i can also recommend a good intro book to modern control. you may also want to look into signals and systems basics before that though
10:48 ace4016 as the concepts in signals and systems are the core of control systems
11:01 R0b0t1 ace4016: Please do
11:02 R0b0t1 I keep a list of things people tell me to read
11:09 R0b0t1 ace4016: Also, difference between modern and classic control?
11:12 ace4016 modern uses state-space to describe the systems and controllers
11:12 ace4016 classical control uses the normal polynomial equations to describe the same systems and controllers
11:12 ace4016 classical might concentrate a bit more on things like plots and graphs as well
11:13 ace4016 the modern control book i used and enjoyed was "Linear System Theory and Design" by Chi-Tsong Chen
11:14 ace4016 my classical control book was "Control Systems Engineering" by Norman S. Nise
11:14 R0b0t1 thanks
11:15 ace4016 and a signals and systems book that might help (was a rough read) is "Signals and Systems" by Alan V. Oppenheim and Alan S. Willsky
11:16 ace4016 the first book was the third edition, second was the fourth editionm and the last was the second edition. if that matters to you (some books get worse or better with edition releases)
15:22 MrCurious make robots.... faster
21:05 MrCurious http://www.youtube.com/watch?v=KrkzLe5Eq1I&feature=youtu.be
21:07 MrCurious nm that, better version http://www.youtube.com/watch?v=zFg5eWbFxEw&feature=endscreen&NR=1