The hybrid stepper motors in the range conform to the international NEMA standard, and provide 200 steps /rev when used with full step drives or 400 steps per revolution in the preferred half step drive mode. The internal construction has also been optimised for microstepping resulting in improved smoothness of operation. Where increased torque and resolution is required at reduced speed a range of gearheads are available. The motors are suitable for use with either Uni-polar or Bi-polar drive circuits, the 23HS series having 8 leads to provide the choice of parallel or series connection. Despite the high quality of the latest generation HS series, the units remain competitively priced. The 23HS series offer a choice of single or double shaft when encoders or parking brakes are required and a wide range of drive and control modules are available to construct complete high performance systems.