Possible Causes Of Errors - HEIDENHAIN iTNC 530 Service Manual

24.2 Possible Causes of Errors

24 – 400
The portable handwheel was dropped down and damaged.
Severe contamination --> Key functions are possibly damaged.
Jammed chips. --> Key gets stuck.
Note
If there is an active NC STOP signal (e.g., gets stuck) from the handwheel, the machine
cannot be traversed any more.
Contact defective. --> Key no longer reports actuation.
Note
Defective keys either do not contact any more or are in permanent contact.
EMERGENCY STOP button defective
Potentiometer defective
Board defective
Handwheel encoder defective
Liquid has penetrated
Handwheel cable or connector defective
Defective contact in cable adapter. --> Continuous EMERGENCY STOP or permissive keys
nonfunctional.
Short circuit in cable or handwheel
Shock or vibrations. --> Unintended traverse movements.
Problems with the +12 V power supply
Caution
The power supply of the handwheels is not monitored.
A defective handwheel or a handwheel into which liquid has penetrated, can influence the
12 Vdc supply voltage of the control. This can lead to various disturbances of the control,
even to a black screen. It is possible that also error messages are displayed that do not
immediately refer to a defective handwheel.
In this case try to operate the control without handwheel (See "Deselecting and
Disconnecting the Portable Handwheel" on page 24 – 409) to find out whether the
disturbances and error messages mentioned still are generated on the machine.
Handwheel interface on MC defective
HEIDENHAIN Service Manual iTNC 530