CRM – Cryo Rotary Motor

High torque rotational motion with endless encoder option
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Product description

The Cryo Rotary Motor (CRM) is a rotational drive with high torque output. An optical encoder can be fitted for closed loop control. In contrast to typical resistive based encoders it has no blind spots and can measure over 360 angular degrees. The moving parts are made out of nonmagnetic phosphor bronze to minimize interaction with external magnetic fields.

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specsunitCRM1CRM1-COE
SYSTEM SPECIFICATIONS
Active axes-1
Type of motion-Rotational
Coarse/scanning actuator *-Piezo ceramic
Coarse RangedegEndless
Speed @ 293 Krev/min5
Speed @ 4 Krev/min1
Coarse step size @ 293 Kmrad (deg)0.15 - 0.75 (0.008 - 0.04)
Coarse step size @ 4 Kmrad (deg)0.1 - 0.25 (0.005 - 0.015)
Scan Range @ 293Kmrad (deg)0.6 (0.034)
Scan Range @ 4Kmrad (deg)0.15 ( 0.009)
Scanner sensitivity @ 293 K **mrad/V (deg/V)0.005 (0.0003)
Scanner sensitivity @ 4 K **mrad/V (deg/V)0.001 (0.00006)
Driving torqueNmm15
Load capacitygrams200
Operating temperatureK0.02 - 375
Main construction material-Stainless steel, phosphor bronze
Massgrams170180
Dissipation @ 293KmJ/step0.59
Dissipation @ 4KmJ/step0.055
Encoder resolutionPPRN/A850
DRIVE ELECTRONICS
Controller/driver-CAB-230(115), CADM(2), MCM
Encoder readout-N/AOEM2
* Coarse/scan positioning is both done with the CADM(2), not simultaneously
** 0-150V, 10 bits resolution, setpoint rate approx. 10Hz

The COE (Cryo Optical Encoder) is a fiber based optical encoder that can be added to selected positioners for position feedback. It works by illuminating a grid and detecting high/low intensity transitions from features in the grid. Resolution is determined by the pitch of these features. It is an incremental encoder, which means that it will reset to “zero” at a power shutdown. The COE requires the OEM electronics module as light source and position readout. More info can be found in the Downloads section.

CRM1: Cryo Rotary Motor 1
CRM1-COE: Cryo Rotary Motor 1-Cryo Optical Encoder

CRM in Operation in Cryo

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