Optical Scanners: MPM20A and MPM30A Moving Magnet Closed Loop Galvanometer Based Optical Scanners

A New breakthrough in galvo motor design has been achieved that will enable higher performance and greater throughput for your applications. We call it the MPower Galvo Motor design strategy and base it on our fourth generation design. A scanner is not simply a motorized mirror, it is a complex system whose performance can only be optimized when all of the inertial elements, the galvo motor, the mount
and the mirror, are designed and tested as an integrated working unit. With the MPower Galvo Motor strategy, there is no need to search for the best combination of mirror, mount and motor, because we’ve done all the testing and analysis for you. The integrated Mirror, Mount and Motor design of the MPower Motors, coupled with
Cambridge Technology’s innovative servo drivers, will bring higher levels of performance to your 25mm to 50mm beam aperture optical scanning applications.

Model MPM20A Moving Magnet Closed Loop Galvo

Supports apertures of 20mm, 25mm, 27mm, 30mm

Galvanometer Specifications

All Position Detector specifications apply with Cambridge Technology servo driver after a 30 second warm-up. All angles are in mechanical degrees. Consult manual for complete operating instructions.

Mechanical

Rated Angular Excursion:		40°
Rotor Inertia:		4.76 gm cm² , +/-10%
Torque Constant:		0.041 Nm/A, +/-10%
Operating Temperature:		0-50° C
Thermal Impedance (coil to case)		0.6°C/W
Output Shaft Diameter (mm[inch])		Tapered Mount

Electrical/Drive Mechanism

Coil Resistance: (@60°C)		2.85 Ohms, +/-10%
Coil Inductance: (@1kHz)		900 µH, +/-10%
Small Angle Step Response Time:		750 µs, with 20mm, Y mirror, settled to 99%

Position Detector

Linearity:		99.8 %, Minimum, over 20 degrees,
Gain Drift (Ave./[Std Dev]):		0/[35] PPM/° C
Offset Drift (Ave./[Std Dev]):		0/[10] µrad/° C, Maximum

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