Emerson Mini Maestro DCD60x10/20, User Manual

Page: 23 / 30

Mini Maestro User Guide
23
Issue Number: 5 www.controltechniques.com
4.4 Motor phasing
1. Ensure the speed reference signal is zero.
2. Ensure a drive enable signal is
not applied.
3. Apply AC power.
4. Check that the green LED is lit.
5. Check the motor remains stationary or rotates slowly.
6. Increase the speed reference signal and check the motor rotates in the intended
direction and the speed increases.
7. If required, refer to Diagnostic s.
4.5 Dynamic calibration
For modifying the settings, the following equipment is required:
Low frequency function generator
Frequency range: 0Hz to 10Hz
Output voltage: –3.5V to +3.5V
Twin-trace storage oscilloscope
1. Remove the speed reference signal from pins 9 and 10.
2. Connect the function generator output to pins 9 and 10.
3. Set the function generator at the following:
Squarewave output
Amplitude: ±2V
Frequency: 0.2Hz
4. Connect oscilloscope channel A to pin 11.
5. Connect oscilloscope channel B to pin 8.
6. Connect oscilloscope ground to pin 9.
7. Connect the oscilloscope external trigger input to the function generator output.
8. Set the oscilloscope as follows:
Sensitivity: 1mV per division
Timebase: 20ms per division
9. Apply power to the drive.
10. Enable the drive.
If the motor connections are not correct, the motor could rotate at a high speed in an
unspecified direction.
Before testing the motor, disconnect the motor from the machine and ensure the AC
supply can be quickly disconnected from the drive.
WARNING
When the motor load is a slide with limited travel, avoid the slide activating the limit
switches by increasing the reference signal frequency or decreasing the reference signal
amplitude in order to reduce the speed.
The minimum acceptable amplitude for the reference signal is 1V peak-to-peak.
CAUTION
NOTE