Motorized Adjustment Screws

   The 420 series open loop DC drives are designed as motorized replacements for our TPI adjustment screws and manual micrometers used on our 330 series, 100cr series, and 200cr series stages. 

   420 series drives are a cost-effective alternative to our 840 encoded actuators.  Like the 840 actuators, 420 drives incorporate high quality lead screws, DC motors, and low backlash gear heads.  Because of the man-readable scale, 420 series drives are ideal for applications where visual positioning is required.
   The 420 series drives have built in micro-switch travel limits that stop the drive prior to end of travel.  This feature both eliminates the end of travel torque on the motor/gear head and accidental end of travel damage to stages that are being driven.