The smdx66 power drive represents an entirely new power drive generation. State-of-the-art electronic components such as digital signal processors (DSP) and completely new current control algorithms made it possible to significantly reduce the product cost. Still the main focus was to achieve excellent running performance such as low resonance run, high step angle accuracy and high and constant output torque from step to step. This was realized with a very precise and fully digital phase current control with direct current measurement in the motor windings. If required and upon request other step resolutions are possible. With the same hardware platform all 2 phase stepper or 3 phase stepper can be operated. The smdx66 is offered in different versions for optimized application cost efficiency. There is an OEM version (PCB only) for the volume business e.g. operation inside a customer device, then there is an open frame version with mounting bracket and for EMI relevant applications even a version with housing. An optional heat sink can be retrofitted should it be required. The device is preferably wall mount to the control cabinet panel. The smdx66 covers almost the entire 2 phase stepper and 3 phase stepper range within the NEMA23 (motor flange size 56mm) and the NEMA34 range (motor flange size 86mm).