Minarik NRGD-4Q Series, User Manual, Page: 51 / 80

2. Set ARM/TACH FEEDBACK jumpers J502 and J503 for
armature feedback. Refer to Figures 10 (pg. 24) and 11 (pg.
25) for jumper locations.
3. Run the motor at full speed. Measure the armature voltage
across A1 and A2 using a voltmeter.
4. Run the motor at either minimum speed or zero speed.
5. Remove AC line voltage.
6. Set ARM/TACH FEEDBACK jumpers J502 and J503 for
tachogenerator feedback.
7. Set the TACH VOLTAGE jumper to the correct
tachogenerator voltage range.
8. Apply AC line voltage.
9. Set the IR COMP trimpot full CCW.
10. Set the TACH trimpot full CW.
11. Run the motor at full speed.
12. Adjust the TACH trimpot until the armature voltage is the
same value as the voltage measured in step 3.
Check that the tachogenerator is properly calibrated. The motor
should run at the same set speed when the ARM/TACH
FEEDBACK jumpers are set to either armature or tachogenerator
feedback.
39 Calibration
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