DeWalt Transmission Problem

[ajlapp]

Yes, removing the pins will allow the transmission to easily back-drive. But that isn't necessarily a bad thing.

A common practice is to counter-balance your arm, then use a pot or encoder as a feedback signal. Software can then understand the arm/joint location and use the motor to keep the structure located in space.

There are many examples of this on chief....a tag search for "arm" should give many examples of how teams have previously built arm-like systems.

This RUSH Bot from 2005.....you can see the gas springs on the lower joint that help counter-balance the weight of the arm system.
http://www.chiefdelphi.com/media/photos/20302

Chiefdelphi from 2000 using gas springs as counter-balance and dampers.
http://www.chiefdelphi.com/media/photos/12954

[Josh Murphy]

Is the motor itself jumping inside or is it the chain/belt? We did have this problem about a week ago and we are using the globes to move some pretty light material. We were trying to save weight and didn't put the black rings on them that control the torque. They would not move what we wanted them to when we put load on them so I put the black rings back on and set the torque on the arrow, not on any numbers and we have been fine since.