Adjustments; Current Limit (R24); Gain And Scale Factor Adjustments (R6, R9, R12, And R22); Balance Adjustment (R16) - Aerotech 6020HRJ User Manual

6020HRJ/8030J User's Manual
3.4.

Adjustments

3.4.1.

Current Limit (R24)

The maximum value of motor current can be set by adjusting R24 (CW rotation decreases
maximum current). The current monitor, TB2-20 (5A/volt) and common may be used to
set the desired level. To set, monitor TB2-20 with an oscilloscope (TB1-4 or 6 common)
and command the motor to step or reverse speed. Adjust R24 to obtain the desired peak
current.
3.4.2.

Gain and Scale Factor Adjustments (R6, R9, R12, and R22)

Scale factor adjustments are R6, R9, and R12 for inputs 1, 2, and 3 respectively. The
GAIN adjustment is R22. Connect the tach to input 3 and turn R12 and R22 fully CW.
The AC power can now be switched ON. If the motor "runs away", then reverse the tach
connection to input 3. If the motor rotates slowly in either direction, adjust the balance
pot R16. Adjust R22 CCW until the motor oscillates, then adjust CW until oscillation
ceases. Continue for 1/8 to 1/16 turn further CCW. Apply velocity commands or position
error signal to input 1 or 2. Utilize the differential input TB1-2 and TB1-5 when possible.
Adjust R6 or R9 to obtain proper speed for the input being used.
Input 1 will command greater speed than input 2 because R7 is smaller than R10. If the
speed is too fast with the scale factor full CCW, increase R7 or R10. If the speed is too
slow with the scale factor full CW, R12 can be adjusted CCW. If R12 is adjusted, R22
will require readjustment.
3.4.3.

Balance Adjustment (R16)

The pre-amplifier balance (R16) should be adjusted so that the motor does not turn when
zero velocity is commanded. A high-resolution multi-turn pot is used. If it is determined
that the balance is difficult to adjust, then R18 can be increased. Increasing R18 may
decrease bandwidth and R22 may need readjustment.
3.4.4.

Overcurrent Trip Adjustment (R100)

This adjustment sets the trip level of the overcurrent circuit. This level is factory set and
should not be adjusted.
Version 1.1
Installation and Operation
Aerotech, Inc.
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