#robotics Logs

Mar 23 2019

11:58 AM rue_bed2: ok I have to wake up and hurry to the screw store
12:39 PM DarkZero is now known as horohoro
01:40 PM rue_mohr: --
11:31 PM anonnumberanon: http://www.ruderal.com/bullshit/bullshit.htm?fbclid=IwAR0VN5Tdc4xuIrrYGLCC5xj8VDUuoclWKPTx7MJ6medAynFdcRksfm8AyZ0
11:47 PM rue_mohr: ?
11:50 PM mun: hi
11:50 PM mun: anyone know of a good way to make a motor controlled arm become a passive link on trigger? that is, the joint can be active (motor controlled) and passive at different times?
11:50 PM mun: some sort of a clutch? but they're expensive :(
11:51 PM zhanx: rue_mohr,
11:53 PM zhanx: mun, hang out till rue gets back on
11:53 PM mun: sure
11:54 PM zhanx: i an thinking you want an encoder setup but...
11:54 PM mun: zhanx but the shaft would still be fixed to the link
11:54 PM mun: to the arm
11:54 PM zhanx: when you want it passive are you physically moving it or want it locked in place
11:54 PM rue_mohr: I'm back
11:54 PM * rue_mohr looks up
11:54 PM mun: zhanx physically moving
11:54 PM mun: rue_mohr hi :)
11:55 PM rue_mohr: you want to make a servo
11:55 PM zhanx: rue can correct me but you want a servo, to read postion and record it
11:55 PM rue_mohr: the hobby servos are pretty hard to backdrive
11:55 PM zhanx: and he did
11:55 PM rue_mohr: thats the only snag
11:55 PM mun: make my own servo?
11:56 PM zhanx: turn your motors in to servo's
11:56 PM rue_mohr: ok, wait, explain the goal
11:56 PM mun: but it'd still be hard to backdrive, right
11:56 PM rue_mohr: I'm distracted
11:57 PM zhanx: rue sounds like IK but manually placed
11:57 PM mun: i'm just trying to build a rocker bogie that can actively control the bogie joint
11:57 PM rue_mohr: ok
11:57 PM rue_mohr: so, you want a manual control for a servo?
11:58 PM mun: yeah, i suppose
11:58 PM rue_mohr: ok, how much resistance is ok when the servo is off?
11:58 PM rue_mohr: you want it completely free?
11:58 PM mun: i'm trying to lift the rocker when the obstacle is huge
11:59 PM mun: rue_mohr yeah, ideally
11:59 PM rue_mohr: k
11:59 PM rue_mohr: how much force to lift the rocker?