#robotics Logs

Jan 15 2014

00:10 theBear heh, always thought he made a good president
00:10 GuShH_ he does in the movie (machete)
00:12 onr GargantuaSauce: do you use ODE library directly or some mechanics simulation software that integrates ODE?
00:12 Jentrep ODE?
00:12 Jentrep Ordinary Differential Equations?
00:12 GargantuaSauce neither, i haven't written my own simulation yet (though i do plan to)
00:13 GargantuaSauce i've just noted that many academic works apply it, directly i believe
00:13 GargantuaSauce http://vimeo.com/79098420 this for example
00:14 onr yeah it's popular among game engines, but
00:14 GargantuaSauce when i start doing my own sim i will probably dick around with ODE a bit and then move on to my own implementation
00:15 GargantuaSauce Jentrep: open dynamics engine
00:15 Jentrep GargantuaSauce: oh lol cool
00:15 Jentrep never heard of it before! D:
00:16 Jentrep That muscle-based locomotion is awesome! O_O
00:16 MrCurious GargantuaSauce: i sent that very link to robustra tonight
00:16 MrCurious well video
00:16 MrCurious dif link
00:17 GargantuaSauce it's pretty wild
00:17 GargantuaSauce they stepped the sim at 3000fps
00:17 GargantuaSauce and the parameter optimizations took up to 12 hours
00:17 GargantuaSauce i suggest you skim the paper, it's very interesting
00:20 Jentrep I just want to start building a system that does that right NOW!
00:20 Jentrep Physical System
00:20 Jentrep Where do I start? :P
00:21 GargantuaSauce well we don't really have artificial muscles
00:21 GargantuaSauce there are other linear actuators but they have significantly different characteristics
00:21 Jentrep Well can't we build a similiar neural delay control system though?!?! :O
00:22 GargantuaSauce it's just software
00:22 Jentrep Where can I find a list of ALL AVAILABLE actuator types! O_O
00:22 Jentrep Yeah I know it's just software
00:22 GargantuaSauce the googles
00:22 Jentrep That's why I think this could partially work with physical componets available now
00:22 Jentrep *components
00:23 Jentrep GargantuaSauce: the googles? :(
00:23 theBear ALL AVAILABLE TYPES, DAMMIT JIM !
00:23 Jentrep ^^^
00:24 Jentrep you guys hate me :(
00:26 Jentrep Y U MAKE ME GOOGLE? D:
00:27 GargantuaSauce because it's how i would answer that question anyway
00:27 GargantuaSauce and it makes a lot more sense for you to google it than to use me as a google proxy
00:27 theBear you're right, we probly should be wearing goggles around all these giant letters
00:28 theBear or at least dark sunglasses
00:28 GargantuaSauce and if you want custom-tailored analysis you can hire me.
00:28 Jentrep I LIKE PROXIES! D:
00:29 GargantuaSauce i take paypal, sexual favours, and mosfets
00:29 Jentrep In Soviet Russia, Google proxy you.
00:30 MrCurious give a maker a robot, and you amuse him for a day, teach him how to make a robot, and you can sit back and watch mechanical armies crush the planet
00:31 Jentrep The only thing I am finding is VALVE ACTUATORS!!! >_________________________________<
00:31 MrCurious or something like that. may have botched the quote
00:31 theBear me too, now go up the corner and get me some smokes and liquor !
00:31 MrCurious then change your search terms
00:31 MrCurious linear actuators
00:31 Jentrep In Soviet Russia, search terms change YOU!
00:31 MrCurious linear motion
00:31 MrCurious robotic elbow actuator
00:32 MrCurious and for the most part they dont sell the onew you really want
00:32 Jentrep what the hell is this? http://www.robotshop.com/en/actuators.html
00:32 Jentrep MrCurious: WHAT DOES THAT MEAN?!?! D:
00:32 MrCurious you want a stepper driving a harmonic drive gear box
00:32 Jentrep Y THEY NO SELL THE ONE I WANT?!?! D:
00:32 MrCurious because harmonic drive is hard to make and shit aweful expensive
00:33 Jentrep MrCurious: why didn't you say that a long time ago? >______________>
00:33 Jentrep How do you know that is what I need???
00:33 MrCurious and thus... the hacking component is intorduced to your hobby to make up for the lack of filthy rich component
00:33 MrCurious i dont
00:33 Jentrep I was thinking I might need one of them Alcubierre drives
00:33 MrCurious i just looked back at the tracks in the snow that led me hear and asumed....
00:33 MrCurious was i far off?
00:34 Jentrep Idk
00:34 MrCurious bet you got a bunch of fun words to search google for out of that diatribe
00:34 MrCurious i think now i will go back to wishing norovirus out of me
00:54 rue_house gee, you could print them in 3d
00:54 rue_house thingverse dosn't have a harmonic drive?
00:58 Rif rue_house, did you get printing yet?
00:58 rue_house hell no!
00:58 rue_house but I started work on it again
00:58 rue_house got marlin to compile
00:58 Rif goodo
00:58 rue_house that took a night
00:58 rue_house I started to assemble the driver baord
00:58 rue_house I have it mocked togethor on the bench
00:59 Rif did you get an unassembled board
00:59 rue_house then I can run the head, still have to finsh up motor drivers
00:59 rue_house no, I dont want to use those little drivers
00:59 Rif fair enough, they work for everyone else
00:59 rue_house part of what I need to do it know how to design parts too
01:00 rue_house even if the machine were togethor it would be gathering dust
01:00 Rif i've got some nice 8amp stepper drivers, but they are for the nema34 motors
01:00 rue_house yea, one of the first things is to upgrade the machine
01:00 Rif you should be able to use openscad pretty well no?
01:00 rue_house lots of stupidities on it
01:00 rue_house I dont like scripted cad
01:01 rue_house esp casue its CSG is horrid
01:01 Rif use sketchup then
01:01 rue_house whats the deal with scetchup, I thought it was free via google?
01:01 Rif used to be
01:01 Rif not owned by google anymore
01:01 rue_house all I can find is a privite company
01:01 rue_house selling it
01:01 Rif yep thats the one, they should still have a free version
01:02 rue_house cant find it
01:02 Rif i'g have install files for the old one around somewhere
01:02 rue_house that would be cool, whats min os, xp?
01:03 Rif maybe, not sure
01:04 rue_house my knock controlled light is down to a successfull detect rate of about 60%
01:04 rue_house but a few of those are me really screwing up the knock
01:06 rue_house gngiht all
01:06 Rif cya
08:02 Tom_L http://www.electronicproducts.com/Digital_ICs/Microprocessors_Microcontrollers_DSPs/Electronic_chips_so_flexible_they_can_be_wrapped_around_a_human_hair.aspx
08:02 Tom_L http://www.electronicproducts.com/Computer_Systems/Standalone_Mobile/Corning_39_s_new_germ_killing_glass_will_become_a_mobile_phone_standard.aspx
08:35 Dumle29 Hey there. I'm trying to understand the working principles of a delta robot of the Rostock type: https://docs.google.com/viewer?a=v&pid=forums&srcid=MTgyNjQwODAyMDkxNzQxMTUwNzIBMDc2NTg4NjQ0MjUxMTE1ODY5OTkBdmZiejRRR2phZjhKATQBAXYy&pli=1
08:36 Dumle29 wait nvm I think I found something
08:56 rue_house Dumle29, how are you with 3d math?
08:59 Dumle29 Honestly not too goo
08:59 Dumle29 good*
09:00 Dumle29 I do have it in school, hence the need for me to understand this :/
09:01 Dumle29 rue_house: In that document I linked, I get stuck at pave 5: "we will show that these vectors can be moved from the end of the arc and applied to the column positions"
09:01 Dumle29 I don't see any mention of any arcs anywhere
09:03 Dumle29 and what would you have it. I negated the mention of any arcs, And I think I get it now. I think what he means, is that you can take that E vektor, and apply it at the other end of the line of action, hence moving your arm to a virtual collum
09:03 Dumle29 correct?
09:07 rue_house if you took a ball, and ran strings from it to 3 corners of your room, each string would be a different length for each position in your room, right?
09:13 Dumle29 well yes, depending on where the ball was?
09:22 mle29 prods rue_hous
09:43 armyofevilrobots @dumle29 Yes, depending on where the ball was. Think of this toy: http://www.marginallyclever.com/blog/drawbot/ which works in 2d first, then consider adding the third dimension.
18:56 rue_house Dumle29, had to answer a little quicker, I went to work, now I'm gonna pass out for a few hours
19:07 rue_house armyofevilrobots, tommorow!
19:07 rue_house shall I bring my knock controlled light? :)
19:08 Auzze armyofevilrobots ???
21:25 MrCurious https://theeyetribe.com/products/
22:27 rue_house so? whats up?
22:31 robotustra_ nothing
22:31 Faek Hot
22:31 GargantuaSauce pissing away my precious time reading useless garbage on reddit
22:35 RifRaf its too hot to work :/
22:37 RifRaf robotustra, i loved the eye, is that a little pager motor in them? do you have any imafges of the mechanical stuff?
22:44 rue_house RifRaf, what you up to latley?
22:48 robotustra_ RifRaf: 1 sec
22:49 robotustra_ it's little tail helicopter motors
22:50 robotustra_ RifRaf: some photos http://maholet.livejournal.com/31987.html
22:59 rue_house RifRaf, there ya go, make a quadcopter and just have it hover over you
23:00 rue_house robotustra, the ccd dosn't move?
23:04 rue_house ooo stitched wood!
23:07 rue_house robotustra, have a template for the hand?
23:07 rue_house its a bit out, I want to correct it!
23:09 robotustra_ what is ccd?
23:10 robotustra_ I draw a hand template
23:10 rue_house light sensor baord behind lens?
23:10 rue_house http://ic.pics.livejournal.com/maholet/24765393/23335/23335_600.jpg
23:10 rue_house ^^ you did this?
23:10 robotustra_ in 2006
23:10 rue_house its nice
23:10 robotustra_ thanks
23:11 rue_house I have not seen that use of string before
23:11 robotustra_ now you see
23:11 rue_house were you going to do more?
23:12 robotustra_ I'm going to make a whole humanoid robot starting from head
23:12 robotustra_ and down to legs
23:12 rue_house :) thats just cause the head is the fun part, wait till you have to work on its shiney metal ass
23:12 robotustra_ :)
23:13 robotustra_ it will be mostly from polycarbonate + silicone
23:13 rue_house robotustra, does the curve need to be special for the joint or is it just round?
23:13 robotustra_ cylindrical
23:14 rue_house ok, any radius?
23:14 robotustra_ yes
23:14 robotustra_ this joints is very time consuming
23:14 rue_house they limit dont they? you cant bend the finger backwardss?
23:14 robotustra_ are
23:15 robotustra_ they limits but if not to overforce
23:15 robotustra_ you cad break threads
23:15 robotustra_ can
23:15 rue_house are the threads in grooves?
23:15 robotustra_ if apply too much force
23:15 robotustra_ yes
23:15 rue_house (and hole)
23:15 robotustra_ yes
23:15 robotustra_ nylon thread
23:16 rue_house fishing line?
23:16 robotustra_ no
23:16 rue_house hmm
23:16 robotustra_ it's about 1 mm thread
23:16 rue_house the palm should be more peices...
23:17 robotustra_ depending on the task
23:17 rue_house http://upload.wikimedia.org/wikipedia/commons/a/ab/Scheme_human_hand_bones-en.svg
23:17 robotustra_ for instance, human hand has about 21 DOF
23:17 rue_house then it can cup sideways
23:17 rue_house 21 eh?
23:17 robotustra_ yes
23:18 robotustra_ to implement at least 16 it's enough
23:18 rue_house I get about 12 or 13
23:18 robotustra_ I mean palm
23:18 robotustra_ what for?
23:18 rue_house my hand
23:18 robotustra_ ok
23:19 rue_house and I havn't chopped off the extra fingers yet
23:19 rue_house they can be handy... but so would a sticked taped to the side of my hand
23:22 robotustra_ http://postimg.org/image/p283h5w7h/
23:23 rue_house knuckle are not in row on human
23:23 rue_house ^s
23:24 robotustra_ yes
23:24 robotustra_ it's just a try
23:24 robotustra_ to make it from sheet material
23:24 rue_house how long did it take to make the wood hand?
23:24 robotustra_ I go sleep
23:25 rue_house me too!
23:25 robotustra_ 1 week
23:25 robotustra_ bb
23:27 rue_house robotustra, for later: DesignerThinking.com/fingers.html
23:28 armyofevilrobots http://www.cs.ubc.ca/~van/papers/2013-TOG-MuscleBasedBipeds/2013-TOG-MuscleBasedBipeds.pdf
23:28 armyofevilrobots and video of the above paper: http://vimeo.com/79098420
23:28 rue_house vimeo dosn't work
23:29 rue_house dont knwo why not
23:29 armyofevilrobots Odd.
23:29 armyofevilrobots I just watched it.
23:29 rue_house vimeo usually dosn't work on my machien
23:30 armyofevilrobots ah well. You can come over and watch it tomorrow :D
23:30 rue_house ooo
23:30 rue_house shall I see if I can bring my air muscle servo?
23:30 rue_house have a low pressure air supply? 18 psi or so?
23:31 armyofevilrobots Sure. I have a compressor ready to go.
23:31 rue_house yay, its got naming conventions I can recycle!
23:31 rue_house does it have a regulator that goes pretty low?
23:33 rue_house I'm into the pneumatic muscles because of the built in compliance
23:35 rue_house I have to work out code to operate counteracting muscles, or for that matter,even an alg.
23:36 armyofevilrobots I can regulate down, but not sure how low.
23:37 armyofevilrobots We could just bleed it down to 18 lbs then turn it off and on to regulate by hand.