2.1 Drives and controllers
Since all drives are equipped with absolute encoders, reference runs or homefind procedures on power-on are
not needed any more.
The telescope, focuser, rotator know their current position right after start-up.
Altitude and Azimuth drives
Motors ASA torque motors: d=290mm, max. torque = 140Nm
Controller ASA Torque motor controller board
Feedback Sensor high resolution optical absolute encoders
max. rotational speed 6° (up to 10° optional)
max. travel angle in azimuth +-340°
travel range in altitude 10° … 90°
Tertiary mirror drive
Motor ASA torque motor: d=127mm, max. torque = 12Nm
Controller ASA Torque motor controller board
Feedback Sensor high resolution optical absolute encoders
Focuser
Secondary mirror focusing
Motor Linear stepper motor, min. step size < 0.1µm
Controller ASA Stepper motor controller board
Feedback sensor ASA absolute encoder, resolution = 0.156µm
max. travel distance 30mm
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