Stepper Holding Current Rules for Lab Automation

Hold current should follow the real risk state

Many instruments keep hold current high by default even though the axis only needs torque in a few defined windows. That burns thermal budget for no real gain.

We map hold state against gravity, vibration risk, and recovery demand so the control team can justify each setting with actual use cases.

• Separate hold states by axis orientation and disturbance risk.
• Document temperature rise after idle dwell, not only during motion.
• Use the same hold-current logic in service mode and production mode unless there is a clear reason not to.

Hold-current review

State-based hold control

const holdCurrentPct = axisOrientation === 'vertical' ? 70 : 45;
controller.setHoldCurrent(holdCurrentPct);