DC geared motors for rotary positioning
13 September 2011
The new MR geared rotary actuators from Lenze's Techdrives division offer compact, simple and low cost positioning. The range comprises three models of dc geared motors with integrated encoder or potentiometer, combined with worm gearboxes. With IP65 enclosure, a maintenance free design and IEC output dimensions, the MR range suits a wide variety of positioning applications such as cameras, lighting, windows, sun blinds and screens.
The first two models in the MR range have output torques of 3 and 15Nm respectively. DC motors of either 12 or 24V provide output speeds from 60 to 500rpm depending on the model and the ratio of the worm gearbox. A two channel encoder built into the motor gives positioning or speed feedback at either 1 or 4 pulses per revolution. Depending on the gear ratio, this corresponds to between 12 and 276 pulses per revolution of the output shaft.
The third model also has a rated torque of 15Nm, but instead of the encoder it has two –built-in stroke limit switches that can be set in a range from 20 to 140 revolutions of the output shaft. In addition there is a 5kOhm rotary potentiometer for position feedback.
The MR geared rotary actuators are manufactured by linear actuator specialist Linear-Mech and are available in the UK through Lenze's Techdrives division.
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