Error Message:

DRUM: Index occurred at xx, more than 3 ticks before normal ticks per rotation

Applies to:

• All

Service Information:

This error is reported if the index is detected more than 3 ticks before, or greater than 100 ticks after the expected index position.

Unfortunately, the drum direction was not taken into account in drum modules 1.40 up to 1.82 (fall 2000). So this error might come up if the drum is moving in the negative direction at high speed. In this case, the number reported in the error message will be around 19996 for Heidenhain encoders, or 35996 for Creo encoders. The only workaround is to slow down the drum unload speed, until upgrade to newer firmware is available.

Operator Action:

Resume and report to Creo Response center.

Cause:

• Firmware error in drum modules 1.40 to 1.82.
• Bad encoder

See Also:

• NVS: al uldvel
• NVS: al udv
• NVS: al uldv
• NVS: unload uldv