Improvement of Positioning Accuracy on a Belt Conveyor Using a Stop Sensor

A three-phase AC induction motor is used with an inverter to control the speed of the conveyor.  An external sensor is placed where the conveyor needs to stop, and the conveyor stops when the sensor is triggered by the load.  Since AC induction motors have an overrun, the stopping position varies with changes in load weight and operating speed. The CVK Series SC speed control systems, paired with PKP Series stepper motors, can significantly improve stopping accuracy with simple control via sensor input.

Issue: Improving the Accuracy of the Stop Position

A three-phase induction motor drives the conveyor and an external sensor input stops the conveyor (an inverter is used for speed control)

Application: Transporting loads

Challenge:

• Stopping position varies with changes in workpiece weight and operating speed
  (Induction motor overrun amount changes)

Solution: Stepper Motor CVK Series SC Speed Control System for Improved Stopping Accuracy with Simple Control

The CVK Series SC speed control system features improved stop position repeatability thanks to constant travel amounts from the sensor input.