#robotics Logs

Oct 24 2013

00:55 MrCurious this 1S lipo cell was totally flat and from a very very old cell phone
00:55 MrCurious so far its taking a harge
00:55 MrCurious not holding it for shit, but its taking it for the moment
01:40 MrCurious We come from nothing, we are going back to nothing-In the end what have we lost? Nothing...
01:45 MrCurious always look on the bright side of life *whistle*
01:45 MrCurious raise your hand if your arms are out, your head is boobbing side to side, and your whisteling
09:24 rue_house http://eds.dyndns.org/~ircjunk/robots/arm5/p1030873.jpg
09:24 rue_house hmm
09:52 rgantuaSauce squ
09:57 GuShH GargantuaSauce: let's get rue a new camera or a new hosting
09:58 GargantuaSauce his camera is fine, it's the hosting
09:58 GuShH what's with the red box
09:58 GargantuaSauce servage is $3 a month
09:59 GuShH I pay a bit less than that and I get as much bandwidth as I can consume (it's limited, but I won't reach it)
09:59 GuShH shared *nix host
09:59 GuShH new Asterix book.. interesting
10:01 GuShH heh they even minted asterix coins in Paris
10:01 GuShH 10, 50 and 100 euro
10:03 theBear le obelix, hehehe, french accents are funny
10:55 tttb does anyone have ideas on where energy should be stored in a humanoid robot? I don't think it should be a battery as they are very fragile
10:55 tttb i think in humans it's kind of our bloodstream
10:56 tttb well, it is since oxygen is our fuel
10:57 tttb i think i would just use a very heavy rotating sphere
10:58 tttb but then it would need suspensions and things so that it isn't damped every time he gets up
10:58 tttb :/
11:00 theBear huh ? oxygen is no more our fuel than it is a cars fuel
11:01 theBear and as far as we go, any long term storage is fat, but it's limited and inefficient and SLOW to convert back to usefull energy (maybe both ways) therefore we
11:01 theBear need to eat regularly
11:09 tttb so i guess oxygen activates the process of fuel-burning rather than being the actual fuel
11:09 tttb activates/allows
11:10 tttb can you live off fat?
11:11 tttb apparently you die from hunger when half the proteins are used up or all the fats
11:13 Triffid_Hunter theBear: not that slow to convert fat actually, our bodies can convert it to energy at about 80% of the rate of carbohydrates
11:14 Triffid_Hunter tttb: keto diet is mostly fat and protein, with specific restriction on carbohydrates
11:25 theBear if it was what i would call 'fast enough', a fat person could never starve until they had ceased to be a fat person
11:27 Triffid_Hunter theBear: some fat people can't lose weight and can starve because their bodies will happily store fat, but refuse to break it back down again due to biochemical madness
11:28 Triffid_Hunter when that biochem madness is absent, they indeed will not starve until they are thin
11:30 theBear lol, is that similar to paranoid psychosis or err, crazy toes
11:30 theBear so what yer trying not to say out loud, is that you think fat people are slow and mad :)
11:33 Triffid_Hunter theBear: no, I'm saying that for some, it's not simply a matter of diet and exercise, a theory which society at large espouses with great eagerness to justify contempt
12:32 cambazz hello, imagine i have two motors with different rate gearboxes, one of them 1:50, the other 1:250 reduction rates. how can i join the movement from those two motors to one shaft? by means of gearing or power transmission
12:32 cambazz basically i am looking into a way where i use two motors to drive one track, in order to have both torque and speed at the same time
12:33 cambazz it is possible, i just dont know the name for it
12:36 any65853467 clutch
12:37 any65853467 you could use one motor and two gearboxes
12:37 any65853467 one motor and one gearbox (with two ratios in it)
12:38 any65853467 heck, you canget two-speed gearboxes as small as hand- cordless- battery-powered drills
12:39 GuShH using a clutch for a differential drive is idiotic at best
12:39 any65853467 there's different types of clutches for your torque driving enjoyment, i suggest cone friction or dogged
12:39 any65853467 ymmv, bni
12:41 Triffid_Hunter cambazz: differential or planetary gears can combine two rotations to give a third
12:41 Triffid_Hunter cambazz: see the prius parallel hybrid arrangement for example
12:41 GuShH lawl
12:43 any65853467 i think he left, and is only a lurker now
12:44 GuShH cambazz: instead of jerking off to the assortment of bullshit advice given to you, go buy the proper motor/s, it's cheaper and more efficient that way. quit wasting time with dicking around on pointless exercises.
12:45 GuShH you won't find what you want on a garage sale either. most people on freenode have lost their sense of reality and are basically organic matter linked to wikipedia through a router.
12:45 cambazz well, no no
12:46 cambazz i was thinking how to join two movements with different ratios
12:46 GuShH differential is the keyword
12:46 cambazz to get something with speed and torque at the same time
12:46 cambazz ok
12:46 cambazz differential
12:46 GuShH and again, waste of time - gearing costs more than a new set of motors.
12:46 cambazz i can print one in my 3d printer too
12:47 cambazz no this is not because i need a new set of motors
12:47 GuShH go ahead print some toys, I was thinking big, not small.
12:47 cambazz well one sec, i will show you a video
12:47 GuShH there should already be a working design to print
12:48 GuShH I thought it would be next to impossible to snap a 6mm hss drill bit while hollowing out a bad rivet but it turns out it's quite simple...
12:48 cambazz yes but i dont understand how i can do it with a differential? one motor on two adjoining axes?
12:49 cambazz and allowing the middle part to turn
12:49 any65853467 umm, you want to conenct both motors and transmisions at the same time, and run both at the same time?
12:49 cambazz yes
12:49 ShH hands cambazz the chainsaw motorc
12:49 any65853467 good luck with that
12:50 GuShH if you drive them so their output speed are matched, linking them is not an issue.
12:52 cambazz yes this time i dont get the adventage of the speed
12:52 cambazz i can see how a transmission box can join two motors, in theory
12:52 cambazz but the middle part would rotate, when the speeds are not matched basically
12:54 any65853467 what good would a transmission be if no part out of it will rotate?
12:55 zap0 as a boat anchor