Error Message:

HARDWARE: Carriage limit switch

Applies to:

• All

Service Information:

Carriage movement is disabled because the carriage limit switch on the HOME/AWAY board is tripped. There is a limit switch beside both the HOME switch and the AWAY switch. If either one is tripped, the carriage motor is disabled and the leadscrew must be turned by hand until it is off the switch. Red LED's on the HOME/AWAY board and on the ALE, labelled "LIMIT" and "CM LIMIT", light when one of the limit switches is tripped.

The carriage should not trip the limit switch in normal operation. The limit switch can be tripped if the carriage is travellling too fast upon reaching HOME or AWAY. Usually this will happen only if the carriage has lost track of its position.

Check if the carriage is at either extreme of its travel. The leadscrew must be rotated by turning the pulley attached at the AWAY end. Move the leadscrew so that the carriage moves about one inch towards the centre of the machine. Normal operation should now resume.

If the carriage was not at its extremes, or if moving it manually did not help, the HOME/AWAY board cable (HA-BP) should be checked at its connectors. If reseating the cable does not help, it or the HOME/AWAY board may be faulty.

Operator Action:

Record error message and contact Creo Service

Cause:

• Carriage has travelled past HOME or AWAY switch onto HOME/AWAY limit switch
• Faulty HOME/AWAY board or cable causing false signals

See Also: