Strain-gage-based torque-measuring test bench for stepping motors

Stepping motors are applied in many different types of equipment because they provide a low-maintenance link between electronic and mechanical devices.

Stepping motors are applied in many different types of equipment because they provide a low-maintenance link between electronic and mechanical devices. Owing to the wide application range of stepping motors, producers have found it necessary to optimize motors to specific tasks. This article describes a fully automatic test bench used to evaluate and record stepping-motor performance characteristics. Attention is focused on design of the torque-measuring system which employs strain gages as sensing elements in a specially developed measuring cage.