#robotics Logs

Mar 23 2018

12:03 AM mrdata: nicely organized shop, tho
12:06 AM rue_: http://ruemohr.org/~ircjunk/images/pi/IMG05Mar2018_023544.jpg
12:06 AM rue_: did you snoop the backgrounds of the other images?
12:06 AM rue_: http://ruemohr.org/~ircjunk/images/pi/IMG10Mar2018_200517.jpg
12:07 AM mrdata: yeah even your piles of junk on the tables are neatly lined up
12:07 AM rue_: hahah
12:11 AM orlock: i seem to have 4 or 5 boxes of "crap" from when i've cleaned up a desk or drawer
12:12 AM orlock: and each tub/box has a ball of cables sittin in the middle
12:12 AM rue_: http://ruemohr.org/~ircjunk/images/pi/IMG23Mar2018_050825.jpg
12:12 AM rue_: :)
12:12 AM orlock: and they all seem to bbe the same bundle
12:12 AM orlock: one of eachh USB
12:12 AM orlock: a 5v and a 12v wallwart
12:12 AM orlock: RCA-3.5mm
12:12 AM orlock: i wonder if they are breeding
12:20 AM mrdata: must be
12:20 AM mrdata: keep those genders separate
12:35 AM rue_bed: if the usb cords and adapters breed, do you get power-over-usb cables?
12:42 AM z64555: you get power usb already
12:42 AM z64555: *over usb
12:42 AM z64555: not very much, mind you
12:46 AM Jak_o_Shadows: your cables breed? Lucky.
12:46 AM Jak_o_Shadows: z64555, are you figuring out the end effector position from the joint angles, or the other way around?
12:46 AM rue_bed: my wire breeds
12:47 AM rue_bed: a few years ago I put a few pieces of wire in a large box
12:47 AM Jak_o_Shadows: Not qutie so jealous about that.
12:47 AM rue_bed: and now all we know is that the box is under there somwehre
12:47 AM rue_bed: Jak_o_Shadows, he has no robot
12:47 AM z64555: trying to figure out the dynamics of the kinematic chain right now
12:48 AM Jak_o_Shadows: rue, I am also terminally incapable of building anything real, rememeber.
12:48 AM z64555: or rather, establish some form of analysis to do so
12:48 AM rue_bed: but he wants to work out the kinamatics
12:48 AM Jak_o_Shadows: ohhh, you want to look at dynamics, not just kinematics?
12:48 AM z64555: I have precisely 0 (zero) formal training in mechanical engineering
12:48 AM z64555: Yes, both the dynamics and kinematics
12:49 AM Jak_o_Shadows: I never hear of anyone doing dynamics.
12:49 AM Jak_o_Shadows: 50 million simple tutorials on the basic kinematics without any discussion of constraints or work area calculation
12:49 AM z64555: Although its good to have a path planner for gait analysis and stuff, the simulator I'm working with is... pedantic
12:49 AM Jak_o_Shadows: What simulator? I havn't found one i'm happy with
12:50 AM z64555: something proprietary a friend wrote up
12:50 AM rue_bed: maybe I should give you the povray one I made
12:51 AM z64555: The kinematic chains I mentioned? Each link in the chain is kept together by forcing it toward/away the links its attached to
12:51 AM Jak_o_Shadows: ah.
12:51 AM rue_bed: how did I get so far ahead?
12:51 AM Jak_o_Shadows: It'd be super neat if there was a decent open source one that provided joints, and then calculations of force, torques, velocities, etc
12:52 AM rue_bed: dosn't matter, there is none, your robot is not real
12:52 AM z64555: shush rue
12:53 AM rue_bed: I'd like you to tell me the answer to my math problem
12:53 AM z64555: which one
12:53 AM rue_bed: its the addition of two numbers
12:53 AM rue_bed: I need to know the numberic answer
12:53 AM rue_bed: but I dont know what numbers are being added
12:53 AM rue_bed: tell me the answer
12:54 AM z64555: Given two numbers, A, and B, the addition of them is A + B.
12:54 AM rue_bed: wait, I'd like to know more how sort -R picked EVERY bad song in my mp3 repository
12:54 AM rue_bed: z64555, I need a numberic answer
12:54 AM z64555: There are infinitely many answers
12:55 AM mrdata: it is the demon inside the random generator
12:55 AM rue_bed: its having a good night
12:55 AM rue_bed: over 10000 mp3's and its picking like, every bad one
12:55 AM mrdata: dont you filter this stuff as you collect it?
12:56 AM rue_bed: I didn't when I made it initially
12:56 AM rue_bed: it was 1994, everyone was collecting everything
12:56 AM rue_bed: more was better
12:57 AM rue_bed: 54 cd's of mp3's from one guy, 12 from another, 6 from him, 10 from her,
12:57 AM rue_bed: more was all that mattered to anyone
12:58 AM rue_bed: hard to go to sleep pressing ctrl-c all night
01:13 AM mrdata: i dont collect music but rely on others to play stuff they like
01:14 AM mrdata: i tell them, "i want to hear something i have never heard before"
01:14 AM mrdata: and it's carte blanche from there
01:14 AM mrdata: this way i get exposed to a lot of great music
01:15 AM mrdata: but i'm terrible with band trivia
01:15 AM mrdata: what genre do you like?
07:42 AM z64555: guh, where'd my pencil roll off to this time?
07:53 AM z64555: there it is
07:59 AM z64555: gr, at this rate, I might be better off trying to take coursework towards being a Mechanical Engineer
09:02 AM rue_: mrdata, dosn't work like that for me, I like music or I dont
09:02 AM rue_: ok i RALLY need to change the caps in my monitor
09:12 AM LuminaxWk is now known as Luminax
10:54 AM orlock: http://somepicturesof.space/EtaCarHDR-21-03-2018.png
07:44 PM Jak_o_Shadows: z64555, is this the kinematics still?
08:27 PM rue_: orlock, erp, double/tripple image?
08:28 PM rue_: odd
08:28 PM rue_: only in some spots do there seem to be ghosts
08:28 PM rue_: awesome tho
08:30 PM rue_: orlock, whats the exposure time on that
09:43 PM z64555: Jak_o_Shadows: yep
09:43 PM z64555: or rather, trying to find an analytical method for the dynamics
09:44 PM Jak_o_Shadows: not sure there is an analytical solution for inverse?
11:25 PM ace4016: z64555, perhaps you need more constraints for your IK?