Error Message:

ALE: intermittent picker microswitch detected, cable and switch should be checked.

Applies to:

• Platesetter_3244

Operator Action:

Resume, & report to Creo Service

Service Information:

When the picker moves in towards the plate stack, moves until the picker microswitch is tripped (i.e. both microswithces open) or for distance plate_search_y which ever comes first. If the cable or microswitch is intermittent then the picker y movement will be prematurely stopped before it contacts the plate, therefore the picer microswitch is checked again after the picker has stopped to make sure that that the cups still indicate compressed; if not then this error is reported.

Cause:

• This could be caused by a faulty picker microswithc or cable. There are two picker microswitches behind the outer two sucction cups that sense when the cup spring is compressed. They are connected in parallel and are closed when the cup is NOT compressed.
• Picker head obstructing py movement. If the PZ does not go down far enough, or the bay fixed seal edge is bent down, or the top of the wiper Thompson rail is too high, then the Thompson rail will collide with the fixed bay shutter seal and prevent propper picking of the last 1/2" of plates in the box.
• Springs in the sucction cups are too tight (have not been cut down as required.
• Picker Y drive motor ECO A196 (new PY motor).

See Also:

• NVS: al npm