96-8000 431
OPTIONS
June 1999
ALARMS / FAULTS
If a fault occurs during operation, the red beacon on the VMC will flash and a message will be displayed on the
screen. An alarm code will be placed in the VMCîš’s alarm history and will be available for future reference.
EMERGENCY STOP or a machine fault not associated with the APC inputs or program will halt all motors.
Pressing the RESET button will clear these faults.
Important! If E-STOP was pressed during a pallet change, the control may not know the location of the
pallets or chain, depending on when E-STOP was pressed, and alarm #1011 will be generated. In this case,
refer to the troubleshooting flowchart at the end of this section.
When an alarm occurs, correct the problem, then run a single M50 in MDI mode to reset the APC.
The following is a list of the alarms associated with the APC:
180 Pallet Not Clamped
Before machining a part, the VMC checks to make sure the pallet is in the correct position and is fully
clamped. This alarm will be generated if either of these is not true, or if the pallet change macro has not been
completed. The pallet change macro can be interrupted by pressing E-stop, Reset, or Feed Hold.
This alarm indicates that the VMC table is not in the correct position, a pallet change was not completed, or E-
STOP was pressed.
If the pallet is clamped, run an M50 to reset the machine. If the pallet is in the correct position but not clamped,
push the pallet against the hard stop, run an M18 to clamp the pallet, then run an M50 to reset the machine. If
the pallet is clamped, but not correctly, run an M17 to unclamp, push the pallet to the correct position, run an
M18 to clamp the pallet, then run an M50 to reset the machine.
Less common causes for this alarm could be that the slip clutch is slipping, the motor is at fault, an air
solenoid is bad, or an air line is blocked or kinked.
1002 Unclamp Error
The pallet did not unclamp in the amount of time allowed. This can be caused by a bad air solenoid, a blocked
or kinked air line, or a mechanical problem.
1003 Clamp Error
The pallet did not clamp in the amount of time allowed by the M50 macro. This alarm is most likely caused by
the VMC table not being in the correct position. This can be adjusted using the macro variables for the X
position (#500, 504) as described in the "Installation" section. If the pallet is in the correct position but not
clamped, push the pallet against the hard stop and run an M18.
If the pallet is clamped, but not correctly, run an M17 to unclamp, push the pallet to the correct position, and
run an M18 to clamp the pallet. Less common causes could be that the slip clutch is slipping, the motor is at
fault, an air solenoid is bad, or an air line is blocked or kinked.
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