#robotics Logs

Apr 08 2015

00:53 rue_house with the pinter
00:53 rue_house its not completely gone, but its severly muted
01:36 perdent How would I go about doing iii and iv in this? http://i.gyazo.com/c7f88a5f0def72b59c157e02d79c3b9f.png
01:39 Triffid_Hunter perdent: first, find a real world problem that it applies to. next, describe the problem so that we can understand what's going on
03:31 Tom_itx smells like homework
04:30 LiohAu hey guys, what kind of system can be used to change the height of a robot ?
04:30 LiohAu I was thinking to scissor lifts
04:30 LiohAu but I can't find how to compute the max weight it can supports
04:37 SquirrelCZECH LiohAu: depends on the robot I would say :D
04:38 SquirrelCZECH also
04:38 SquirrelCZECH you have to think about power consumption
04:38 LiohAu SquirrelCZECH: basically it will be similar to an humanoid (2 arms/hands + head..), but the legs are replaced by wheels
04:38 SquirrelCZECH "do I want system that needs energy to "hold" in different height? or system that just consumes energy to change?"
04:39 LiohAu I want a system that consume energy to change
04:40 LiohAu a human has knees that allow to touch the ground with your hands. But since this robot does not have legs, I am looking for a "cheap" way to let it touch the ground with its hands
04:46 LiohAu SquirrelCZECH: do you have another idea ?
04:53 Anniepoo scissor lift - force to lift can be computed with conservation of energy
04:54 Anniepoo force through distance is work, both for jack at botom of scissor lift and for lift lifting weight
04:55 Anniepoo f(scissor) = f(weight)D(weighttravel)/D(scissortravel)
05:01 LiohAu I am not sure to understand. If I have a 30kg object that is lifted at 1m, if I need to reduce its height to 0.5m, will I have something like : 30kg * 0,5m / 0,5m ?
05:07 Triffid_Hunter LiohAu: why not give it telescopic extending arms, or 3 elbows?
05:08 LiohAu Triffid_Hunter: design is harder + needs stronger servomotors
09:11 rue_house ooo someone has extendomatic arms?