The Moving Coil Galvanometer Family

The moving coil capacitive position detector product line combines Cambridge Technology's moving coil actuator technology and our patented moving dielectric capacitive position detector design. This combination offers the highest position accuracy and repeatability of any galvanometer based scanner design. The moving coil scanning systems can be designed and optimized for speed, size, cost and accuracy with typical beam diameters of 5 mm - greater than 50 mm.text

Model 6450 Moving Coil Closed Loop Galvanometer Based Optical Scanner with Capacitive Position Detector

Supports 12 mm apertures

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 instruction.

Mechanical Specifications

Rated Angular Excursion:		40°
Rotor Inertia:		2.3 gm*cm², +/-10%
Torque Constant:		0.45X10⁶dyne-cm/amp, +/-10%
Maximum Coil Temperature:		150°C
Thermal Resistance (Coil to Case):		5.0°C/Watt, Max

Electrical Specifications/Drive Mechanism

Coil Resistance:		4.0 Ohms, +/-10%
Coil Inductance:		450uH, +/-10%
Back EMF Voltage:		0.8mV/degree/sec, +/-10%
RMS Current:		1.8 Amperes at Tcase of 50°C, Max
Peak Current:		6.0 Amperes, Max
Small Angle Step Response Time:		2.0ms, with balanced inertia matched load

Position Detector

Linearity:		99.9%, Minimum, over 40 degrees
Scale Drift:		50PPM/°C, Maximum
Zero Drift:		15 microradians/°C, Maximum
Repeatability, Short Term:		2 microradians
Output Signal, Common Mode:		970 microamperes with AGC voltage of 10VDC, +/-20%
Output Signal, Differential Mode:		21.5 µA/degree, at common mode current 970 µA, +/-20%

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