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DMC80H

Alarm 25201 (Axis B1 drive fault)

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Fault:

Alarm 25201: Axis B1 drive fault. Machine power can’t be on.

Remedy:

Restarted the control and observed alarms under Diagnosis menu:
3000      13:47:15  Emergency stop
25201    13:47:19  Axis B1 drive fault
300504  13:47:19  Axis B1 drive 4 fault of motor transducer
510300  13:47:26  *** Emergency-stop***
……
700112  13:47:27  Pallet changer not in basic position
So the exact fault should be the motor encoder of the rotary table.
After further confirmation replaced the encoder.  The machine then returned to normal.

Alarm 700101+ and oil spill from rotary table

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Fault：

After the pallets exchanged came alarms:
700101 Set-up position not turned to 0 degree.
700026 Pallet has no program/pallet number.
700112 Pallet changer not in basic position.
At the same time oil spilled from around one of the four tapered supports of the rotary table and the bottom.

Remedy:

First removed the outside pallet with crane, and then the inside by six young fellows. Unscrewed the screw on the support and made a copper washer. Re-fixed them with rubber belt. The spill had thus been solved.
Pallet exchanging sequence is as follows:
– Position Z and B axes    B=0    Z=Pallet change pos.
– Pallet unclamped on rotary table       A40.3      E36.3
– Pallet lifted                                         A40.6      E36.0
– Pallet 0° or                                         A40.4      E36.4
–            180°                                        A40.5      E36.5
– Pallet lowered                                    A40.7      E36.1
– Pallet clamped on rotary table           A40.2      E36.2
A (German Ausgang) means output, E (German Eingang) input, both for PLC.
On page Diagnosis/PLC Status both A40.7 and E36.1 were observed as “0”, and A40.5 and E36.5 were “1”, indicating that the sequence was interrupted at ‘Pallet lowered’, and the pallet was not lowered.
Reinstalled PLC, the machine was restored to normal.

Serial Communication Parameter Setting of DMC80H

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When the serial communication with DMC80H is not smooth, the possible reasons are improper parameter setting, wrong or poor hardware connection, improper use of software, or errors in transferred program, etc. Sometimes it’s really a lot of trouble to find the problem. To our experience, communication parameters can be simply set as follows:

Baud rate 19200
No parity
Stop 2
Data 7

After such, if still not normal, turn to check other things.