User manual

CONNECTING THE AMP IN VOLTAGE MODE

Use this checklist for applications that require velocity mode but no tachometer. IR

comp can be used to greatly improve the speed regulation.

1. Connect DC power supply to the amplifier HV and ground.

2. Ground the amplifier chassis at P2-3.

3. Connect motor or load between OUT+(P2-1) and OUT-(P2-2).

4. Connect a reference voltage source between REF+ and REF- inputs.

5. Ground ENABLE, POS ENABLE and NEG ENABLE signals to logic ground.

6. Set DIP switches S1, S2 for motor inductance.

7. Set DIP switches S4, S5, S6, OFF. Set S3 ON, also S7 if using IR COMP.

8. Set REF GAIN pot to full CW.

9. Set FEEDBACK pot to full CCW.

10. Set PEAK CURRENT LIMIT pot to half CW.

11. Set CONT CURRENT LIMIT pot to half CW.

12. Set TACH GAIN pot to full CW.

13. Set IR COMP pot to full CCW.

14. Set VREF to zero volts.

15. Turn power on.

16. Check for green LED indicating normal operation.

17. Set BALANCE pot for zero volts between OUT+ and OUT -.

18. If oscillation occurs, turn FEEDBACK CW till it stops.

19. Momentarily increase reference voltage.

20. Check motor direction : is it OK ? If yes, proceed else power off, reverse OUT+

and OUT- leads, and power on again.

21. Set reference voltage to half the maximum value ( +/-5V ).

22. Set TACH gain till desired no load RPM for max / 2 signal is reached.

23. Apply a load to the motor, and adjust IR comp till the old RPM is re-obtained.

24. Check load current at CURRENT MONITOR output, or by using an ammeter.

25. Adjust PEAK and CONT current limit to the desired values.

26. If oscillation occurs under varying input conditions, re-adjust FEEDBACK and /

or IR COMP pots.

AMPLIFIER

MOTOR

24-150V DC

REF +,-