Valcor Engineering Corporation

Motion Control Reversing Drives


Controlling the rotary direction of a motor typically requires stopping the motor and changing the voltage polarity before restarting it. Another approach is to use a mechanical transmission to accomplish this task. Each method incurs substantial response time. Valcor’s unique Reversing Drives are self contained electromechanical systems that incorporate electromagnetic brakes and clutches to instantaneously start, stop and reverse the direction of an integral output shaft. The drive motor shaft’s direction and speed remain constant and is not subjected to mechanical shock during changes in output shaft rotation.


Reversing Drives applications include:

  • Factory Automation
  • Business Machines
  • Printing equipment including 3D printer, copiers and printing presses
  • Packaging equipment
  • Conveyor Systems

Design Features and Benefits

  • Instantaneously start, stop, and reverse output shaft rotation
  • Zero backlash
  • Sealed gearbox
  • Choice of 6, 12, 24 and 90 VDC input voltages
  • Stationary field coils – no slip rings or brushes
  • Response times as low as 25 mS
  • Optional failsafe brake feature to prevent output shaft from spinning
  • Wide range of output shaft sizes and torques available