Stepper Torque Margin for Packaging Axes

What changes when packaging lines speed up

Teams usually discover the real torque problem after cartons, pusher arms, and cable carriers are all on the same move profile. A static nameplate number is not enough.

We review margin in three windows: launch current, sustained thermal load, and recovery after a stop-start event. That keeps quoting and mechanical review aligned.

• Model reflected inertia before increasing motor frame size.
• Check the torque reserve after cable drag and spring loads are added.
• Thermal headroom matters more than peak torque when the line runs continuously.

Sizing checkpoints

Reference snippet for margin logging

const margin = (availableTorqueNm - demandTorqueNm) / demandTorqueNm;
if (margin < 0.25) {
  throw new Error('Increase motor size or reduce acceleration.');
}
console.log(`Torque margin: ${(margin * 100).toFixed(1)}%`);