Error Message:

DRUM: Timeout on velocity acceleration

Applies to:

• All

Service Information:

The most common causes of this are missing and encoder tick caused by a spec of dirt in just the wrong place - caution close inspection and careful cleaning is required or the spec of dirt may just be moved to a different location.

On VLF the pid parameters pgv igv dgv and pgr igr dgr should be checked.

Operator Action:

Resume.

If problem persists, and you have been shown how to clean the encoder disc and you have the encoder cleaning procedure 73-3289A-B, use encoder cleaning kit 04-0014A to brush off the encoder disc. If that does not help then wipe disc off with LUMINEX cloth, Lastly use Creo Encoder Cleaner to clean the disc using a new Texpwipe TX609, then dry off with a new Texwipe, then polish with clean part of Luminex cloth.

If the problem persists, call Creo Response center.

Cause:

• The error may be due to several factors, either the drum is really not reaching velocity, or the encoder or Hall effect sensors (in the motor), are missreading the drum speed for some reason. This message is reported in 5 different places in the code:
• 1. If, during drum init, the drum does not reach velocity within the hall_mode_timeout (7 sec (12 sec VLFs))
• 2. If, after a <drum spin xx> (i.e. controlling speed in encoder mode) the drum does not reach velocity the within a calculated timeout based on acceleration and final velocity.
• 3. If, during a dynamic braking (regenerative load only) the drum takes more than 10 seconds to stop.
• 4. As for (2) above during a plot.
• 5. If, after a <drum spin xx c> (i.e. controlling speed in Hall mode) the drum does not reach velocity the within a calculated timeout based on acceleration and final velocity.

See Also:

• Other: Troubleshooting information