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 30 mm ranges.

Model 6240H Moving Magnet Closed Loop Galvanometer Based Optical Scanner

The 6240H galvanometer can be designed and optimized for speed, size, cost and accuracy with typical beam diameters of 12mm, 15mm, 20mm, 25mm, and 30mm. It is shown here with a 12mm Y mirror.

Galvanometer Specifications

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

Mechanical Specifications

Rated Angular Excursion:		40°
Rotor Inertia:		2.4 gm cm², +/-10%
Torque Constant:		2.0x10⁵ dyne cm/amp, +/-10%
Maximum Coil Temperature:		110°C
Thermal Resistance (Coil to Case):		0.62°C/Watt, Max

Electrical Specifications/Drive Mechanism

Coil Resistance:		1.03 Ohms, +/-10%
Coil Inductance:		350µH, +/-10%
Back EMF Voltage:		346 µV/degree/sec, +/-10%
RMS Current:		8.2 Amperes at Tcase of 50°C, Max
Peak Current:		25 Amperes, Max
Small Angle Step Response Time:		300 µs, with 12mm Y mirror, settled to 99% 350µs, with 15mm Y mirror, settled to 99% 650 µs, with 20mm 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, aximum
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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