Mechanical
J2 Axis Reducer
Provides the gear reduction and torque multiplication between the J2 servo motor and the lower arm at the shoulder joint.
The J2 axis reducer transmits motor torque to the lower arm at the shoulder joint, and because this axis works against gravity through most of its range, the reducer carries a sustained load even when the robot is stationary and only the brake is holding position.
This continuous static loading, combined with dynamic loading during motion, makes grease condition and seal integrity especially important for this reducer's service life.
A worn J2 reducer often shows up first as a slight sag or softness felt when jogging the axis, before it develops into an audible backlash problem.
Common questions
- What does the J2 Axis Reducer do?
- Provides the gear reduction and torque multiplication between the J2 servo motor and the lower arm at the shoulder joint.
- How does the J2 Axis Reducer fail?
- Common failure modes: Gear wear from sustained static and dynamic shoulder loading, Seal failure leading to grease loss and contamination, Bearing wear causing perceptible arm sag, Sudden damage from an overload or collision.
- What fault codes relate to the J2 Axis Reducer?
- Related codes include SRVO-021.