User manual

CONNECTING THE AMP IN VELOCITY MODE ( WITH TACHOMETER )

Use this checklist for applications that require velocity mode and a tachometer.

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 tachometer between tach input and signal ground.

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

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

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

8. Set DIP switches S3, S4, S5, S6, S7 OFF.

9. Set REF GAIN pot to full CW.

10. Set FEEDBACK pot to full CCW.

11. Set PEAK CURRENT LIMIT pot to half CW.

12. Set CONT CURRENT LIMIT pot to half CW.

13. Set TACH GAIN pot to full CW.

14. Set IR COMP pot to full CCW.

15. Set VREF to zero volts.

16. Turn power on.

17. Check for green LED indicating normal operation.

18. Does motor run away ? If yes, power off. reverse tach leads and power on.

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

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

21. Momentarily increase reference voltage.

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

and OUT- and tach leads, and power on again.

23. Set reference voltage to maximum value ( +/-10V ).

24. Set TACH gain till desired RPM is reached.

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

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

27. If oscillation occurs under varying input conditions, re-adjust FEEDBACK pot.

AMPLIFIER

MOTOR

24-150V DC

REF +,-

TACH