6.2.2 Motor control
Symptom | Check |
|
|
NextMove BXII appears | Check that the connections between motor and drive are |
to be working but will not | correct. Use WorkBench v5 to perform the basic system tests |
cause motor to turn. | (see section 5.4). |
| Ensure that while the NextMove BXII is not in error, the drive is |
| enabled and working. When the NextMove BXII is first powered |
| up the drive should be disabled if there is no program running |
| (there is often an LED on the front of the drive to indicate |
| status). |
| Check that the servo loop gains are setup correctly - check the |
| |
|
|
Motor runs uncontrollably | Check that the encoders are connected, they have power |
when controller is | through Encoder V+ (if required, see sections 4.4.1 and 4.7.1) |
switched on. | and are functioning correctly. Use a dual trace oscilloscope to |
| display both channels of the encoder and/or the complement |
| signals simultaneously. |
| Check that the drive is connected correctly, and that with zero |
| demand from the NextMove BXII there is 0V at the drive |
| demand input. See section 5.4.1. |
| Verify that the NextMove BXII and drive are correctly grounded |
| to a common earth point. |
|
|
Motor runs uncontrollably | Check that the axis’ corresponding encoder and demand |
when controller is | signals are connected to the same axes of motion. Check the |
switched on and servo | demand to the drive is connected with the correct polarity. |
loop gains are applied, or |
|
when a move is set in | Check that for a positive demand signal, a positive increase in |
progress. Motor then | axis position is seen. The Mint DACMODE keyword can be used |
stops after a short time. | 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 loop gains may be set incorrectly. See sections 5.5 to |
vibrates or overshoots | 5.8. |
during a move. |
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| MN1904 |
