HB-25 and robot arm. Axis drifting.
I have 6 HB-25 on my Scorbot robot arm.
I'm using some simple Arduino joystick programming to control each driver with PWM.
When the drivers have no power the arm axis's are difficult to move manually. The are all brushed dc motors with harmonic gearboxes.
When the drivers are powered the axis's affected by gravity drift down. ( shoulder, elbow, wrist).
The base rotate does not move as gravity has no effect on it.
The joystick program on the Arduino works like its suppose to.
Anybody have any ideas??