6800 Family

The 6800 galvanometer family combines Cambridge Technology's moving magnet actuator technology and our first patented dual optical position detector design. This combination offers high positioning speed and accuracy in a compact, lower cost closed loop galvanometer. The 6800 family of scanning systems can be designed and optimized for speed, size, cost and accuracy with typical beam diameters of 3 mm to 10 mm.

Model 6800HP Moving Magnet Optical Position Detector Scanner

Supports 3 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 instructions.

Mechanical

Rated Angular Excursion:		40°
Rotor Inertia:		0.018 gm*cm², +/-10%
Torque Constant:		2.5X10⁴ dyne-cm/amp, +/-10%
Maximum Coil Temperature:		110°C
Thermal Resistance (Coil to Case):		4.0°C/Watt, Max

Electrical/Drive Mechanism

Coil Resistance:		4.2 Ohms, +/-10%
Coil Inductance:		96uH, +/-10%
Back EMF Voltage:		0.04mV/degree/sec, +/-10%
RMS Current:		1.6 Amperes at Tcase of 50°C, Max
Peak Current:		6 Amperes, Max
Small Angle Step Response Time:		0.3ms, with balanced load

Position Detector

Linearity:		98%, Minimum, over 30 degrees
Scale Drift:		0.05 %/°C, Maximum
Zero Drift:		0.01 degrees/°C, Maximum
Repeatability, Short Term:		20 microradians
Output Signal, Common Mode:		50 microamperes with AGC current of 20mA, +/-20%
Output Signal, Differential Mode:		3.2 uA/degree, at common mode current of 50 uA, +/-20%

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