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Rotary Actuators0 pages
Open Loop Galvo Motors
G-Series
The Series G Open Loop Optical Scanners are designed to deflect mirrors of various sizes in commercial and
scientific optical equipment.
The mirror deflection of these galvo motors is proportional to the
drive current, but they do not include a position feedback sensor.
Therefore, they are intended primarily as a lower cost alternative
to General Scanning's closed loop galvo motors where speed of
response or accuracy is not required, or where angular position is
derived independently. The cross-axis motion of these motors is
typically below 10 micro radians.
Motor selection is dictated primarily by the required scan angle,
yet load inertia should be between 1/10 and 10 times that of the
motor’s armature (moving parts).
Series G scanners with mounted mirrors can be driven at any
amplitude up to the rated mechanical rotation. Their bandwidth
is up to 85% of their resonant frequency with a sinusoidal wave,
and up to approximately 5% of the resonance frequency with
sawtooth, triangular or square wave.
The illustration below shows the resonant frequency, in terms of
the mirror-to-armature ratio.
