Optical Scanners: 6200H Moving Magnet Closed Loop Galvanometer Based Optical Scanner

The 6200H series of closed loop galvanometers combines Cambridge Technology's moving magnet actuator technology and our innovative patented advanced optical position detector design. This combination offers the highest positioning speed and precision accuracy in compact, lower cost closed loop galvanometers. The 6200H series scanning systems can be designed and optimized for speed, size, cost and accuracy with typical beam diameters in the 3 to >75 mm ranges.

Model 6220H Moving Magnet Closed Loop Galvanometer Based Optical Scanner

The 6220H galvanometer can be designed and optimized for speed, size, cost and accuracy with typical beam diameters of 5mm, 8mm, 9mm, and 10mm. Shown here with B connector and 8mm mirror.

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 Specifications

Rated Angular Excursion:		40°
Rotor Inertia:		0.125 gm cm², +/-10%
Torque Constant:		6.17x10⁴ dyne cm/amp, +/-10%
Maximum Coil Temperature:		110°C
Thermal Resistance (Coil to Case):		1°C/Watt, Max

Electrical Specifications/Drive Mechanism

Coil Resistance:		2.79 Ohms, +/-10%
Coil Inductance:		180 µH, +/-10%
Back EMF Voltage:		108 µV/degree/sec, +/-10%
RMS Current:		3.9 Amperes at Tcase of 50°C, Max
Peak Current:		20 Amperes, Max
Small Angle Step Response Time:		200 µs, with 5mm Y mirror, settled to 99%

Position Detector

Linearity:		99.9 %, Minimum, over 20 degrees. 99.5% Typical, over 40 degrees
Scale Drift:		50 PPM/°C, Maximum
Zero Drift:		15 µrad/°C, Maximum
Repeatability, Short Term:		8 microradians
Output Signal, Common Mode:		155 µA with AGC current of 30mA, +/-20%
Output Signal, Differential Mode:		11.7 µA/°, at common mode current of 155 µA, +/-20%

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