Symptom | Check |
|
|
Motor runs uncontrollably | (Servo outputs only) Check that the encoder feedback |
when controller is switched | signal(s) are connected to the correct encoder input(s). |
on and servo loop gains are | Check the demand to the drive is connected with the correct |
applied or when a move is | polarity. |
set in progress. Motor then |
|
stops after a short time. | Check that for a positive demand signal, a positive increase |
| in axis position is seen. The ENCODERMODE keyword can |
| be used to change encoder input direction. The DACMODE |
| keyword can be used to reverse DAC output polarity. |
| Check that the maximum following error is set to a |
| reasonable value. For setting up purposes, following error |
| detection may be disabled by setting FOLERRORMODE = 0. |
|
|
Motor is under control, but | (Servo outputs only) Servo loop gains may be set |
vibrates or overshoots | incorrectly. See sections 6.5.2 to 6.7. |
during a move. |
|
|
|
Motor is under control, but | Verify that the backplane and drive are correctly grounded to |
when moved to a position | a common earth point. |
and then back to the start it |
|
does not return to the same | (Servo outputs only) Using an oscilloscope at the backplane |
position. | connectors, check: |
| H all encoder channels are free from electrical noise; |
| H they are correctly wired to the controller; |
| H when the motor turns, the two square wave signals are |
| 90 degrees out of phase. Also check the complement |
| signals. |
| Ensure that the encoder cable uses shielded twisted pair |
| cable, with the outer shield connected at both ends and the |
| inner shields connected only at the NextMove ES end. |
| (Stepper outputs only) The motor is not maintaining |
| synchronization with the NextMove ES drive output signals |
| due to excessive acceleration, speed or load demands on |
| the motor. |
| Check that the acceleration, speed and load are within the |
| capabilities of the motor. |
|
|
7.2.5 WorkBench v5
Symptom | Check |
|
|
The Spy window does not | The system refresh has been disabled. Go to the Tools, |
update | Options menu item, select the System tab and then |
| choose a System Refresh Rate (500ms is recommended). |
|
|
MN1928 | Troubleshooting |
