The PT56 combines the ElectroCraft TorquePowerTM Plus high-performance stepper motor with the advanced functionality of the Integrated PRO Series Drive. The motor can be driven in open-loop stepper mode or in closedloop using the integrated encoder and offers high holding torque and high accuracy in a robust, compact package. Three frame lengths are available in this size, offering holding torque of up to 170 Ncm (241 oz-in).