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5.1.4 Dynamic Calibration without Oscilloscope
An acceptable calibration can normally be obtained by setting the calibration
potentiometers in the following fashion.
THE FOLLOWING ADJUSTMENT PROCESS WILL CAUSE HIGH
FREQUENCY MOTOR INSTABILITY AND OSCILLATION FOR A SHORT
PERIOD OF TIME. VERIFY THAT THE LOAD WON'T BE DAMAGED BY THIS
MOTION.
Set the Acc/Dec pot to fully CCW. This completely eliminates the ramping.
Set the Response and Gain Pots to fully CCW.
Apply power to the amplifier.
Monitor the motor shaft rotation. Adjust the Offset pot until the motor shaft stops
rotating.
CAREFULLY!
Adjust the gain potentiometer CW until the motor just starts to buzz then quickly turn it
CCW until it stops buzzing, then turn it CCW (1) more turn.
CAREFULLY!
Adjust the response potentiometer CW until the motor just starts to buzz then quickly
turn it CCW until it stops buzzing, then turn it CCW (2) more turns.
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CAUTION!
Section 5– Page 6
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