Corrective Action - HEIDENHAIN iTNC 530 Service Manual

18.1.6 Corrective action

If you have found that the position or angle encoder, the scanning head or the cable is defective:
Encoder
components
If you have found that the encoder interface on the control is defective:
Control
18 – 286
Exchange the encoder or the encoder component or perform corrective action (e.g., cleaning
of scale).
Note
To exchange the encoder components, use the enclosed mounting gauges, check gauges,
mounting aids as well as the mounting and replacing instructions.
If available, use special HEIDENHAIN equipment (PWM 9, PWT) for adjustment and signal
assessment.
In a special encoder training course you can learn about corrective action (e.g. cleaning of
scales) and how this equipment is used.
The following tolerances apply by default:
For 1 Vpp encoders:
For 11 µApp encoders:
The exact tolerances of the encoders can be found in the
HEIDENHAIN mounting instructions and brochures.
Note
The scanning head of an EnDat linear encoder is programmed to match the scale (datum
shift, etc.).
For this reason EnDat linear encoders in the field must be replaced together with the
scanning head!
DANGER
EnDat encoders offer the possibility of storing machine or system-dependent data in the
memory area reserved for the machine tool builder. The data may comprise safety-relevant
information.
Ask your machine manufacturer whether and which information has been written to the
EnDat encoder. Ensure that the replacement unit also contains this information!
Failure to do so may result in machine damage or personal injury!
Replace the MC or CC. --> See "Exchange of HEIDENHAIN Components" on page 28 – 523.
0.6 ... 1.2 Vpp
7 ... 16 µApp
HEIDENHAIN Service Manual iTNC 530