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 6231HC Moving Magnet Closed Loop Galvanometer Based Optical Scanner

The 6231H supports apertures of 8mm, 10mm, 12mm, and 15mm. It is shown here with the C connector and a 10mm 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 degrees. Consult manual for complete operating instructions.

Mechanical

Rated Angular Excursion:		40°
Rotor Inertia:		0.82 gm cm² , +/-10%
Torque Constant:		1.11x10⁵ dyne cm/amp, +/-10%
Maximum Rotor Temperature:		110° C
Thermal Resistance (Rotor to Case):		1° C/Watt, Max

Electrical/Drive Mechanism

Coil Resistance:		1.27 Ohms, +/-10%
Coil Inductance:		176 µH, +/-10%
Back EMF Voltage:		195 µV/degree/sec, +/-10%
RMS Current:		5.8 Amperes at Tcase of 50° C, Max
Peak Current:		25 Amperes, Max
Small Angle Step Response Time:		250 µs, with balanced load of 0.3 gm*cm²

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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