microHAM STATION MASTER Manual page 43

Rotator Calibration
The calibration process is absolutely necessary for proper rotator control and consist of two parts: setting rotation
limits and calibrating the position indicator. Both calibrations are done simultaneously.
IMPORTANT: During calibration the previously defined parameters are not used. Clicking Cancel during the
calibration will abort the process and retain the old values.
1. Properly connect the rotator controller to the ROTOR port and remove Station Master's top cover.
2. Click Calibrate button.
3. Select Sensor type, ANALOG for potentiometer sensor or voltage feedback, PULSE for pulse sensor.
4. If your rotor uses BRAKE, set AUX relay for BRAKE function. During calibration AUX will be activated
when the rotator moves, but will be deactivated if rotator is idle for more than 15 sec, to prevent
overheating the brake or power supply. If your rotator uses SPEED control, set AUX for SPEED function.
During calibration AUX will be activated to set the rotator speed to slow.
5. Turn rotator fully counter clockwise (CCW). If rotator turns in the opposite direction, check the "Reverse
direction" box. If your rotator does not have hardware limits, turn the rotator to the desired maximum
counter-clockwise position.
6. If rotator has an ANALOG sensor, adjust the OFFSET trimer
in Station Master until the sensor value shows 0002 (is in
range 0001-0003) and click next.
If rotator has PULSE sensor, click next step.
7. Turn the rotator fully clockwise (CW). If your rotator does
not have hardware limits, turn it to the desired maximum
clockwise. If your rotator uses pulse counting, do not turn it
CCW at all as this will result in an inaccurate pulse count
and effect the calibration.
8. If rotator has an ANALOG sensor set SCALE trimer in
Station Master until sensor value shows 1021 (between
1020-1022) and click next.
If value cannot be set with SCALE trimmer and remains
unchanged, click "Reverse Sensor", and set OFFSET
trimmer until sensor value shows 0002 (between 0001-
0003).
If rotator has PULSE sensor, check if sensor value is non zero, click next and skip to step 13. If sensor
value is zero or has very low number (below 20), check the sensor connection and repeat calibration.
Turn rotator fully counter clockwise (CCW) or to desired maximum CCW position.
9. Slightly readjust OFFSET for improved accuracy until sensor value shows 0002 (between 0001-0003)
and click next.
If "Reverse Sensor" was checked in previous step, set SCALE trimmer until sensor value shows 1021 (is
in range 1020-1022) and click next.
10. Turn rotator fully counter clockwise (CW) or to desired exact final CW position.
11. Slightly readjust SCALE trimmer for improved accuracy until sensor value shows 1021 (between 1020-
1022) and click next.
If "Reverse Sensor" was checked, readjust OFFSET trimer for improved accuracy until sensor value
shows 0002 (between 0001-0003) and click next.
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