HEIDENHAIN iTNC 530 Service Manual page 6

18.5 Position Measurement via Motor Encoder (Indirect Position Measurement) ........... 311
18.6 Switching over the Position Display for Servicing ..................................................... 315
19 Reference Run .................................................................................................................. 317
19.1 Definition ................................................................................................................... 317
19.2 Traversing the Reference Marks ............................................................................... 318
19.3 Possible Causes of Errors ......................................................................................... 318
19.4 Troubleshooting......................................................................................................... 319
19.5 Corrective Action ....................................................................................................... 320
19.6 Deselecting the Reference Run for Axes .................................................................. 320
19.7 Retraction after an Error with Control Reset ............................................................. 321
20 Interface to the Drives ..................................................................................................... 323
20.1 Digital PWM Interface ............................................................................................... 323
20.1.1 Introduction ..................................................................................................... 323
20.1.2 Tables for power supply modules, power stages and motors ........................ 326
20.1.3 Possible causes of error .................................................................................. 332
20.1.4 Sequence for finding errors in the control loop ............................................... 332
20.1.5 Troubleshooting: Interchanging PWM outputs on the CC 422 ........................ 333
20.1.6 Troubleshooting: Interchanging PWM outputs on the CC 424 (B) .................. 336
20.1.7 Troubleshooting: Interchanging power modules or output stages of
the same type ............................................................................................................. 339
20.1.8 Troubleshooting: Interchanging the HEIDENHAIN interface boards
for the SIMODRIVE 611 system ............................................................................... 342
20.1.9 Corrective action .............................................................................................. 343
20.2 Analog Speed Command Interface ........................................................................... 344
20.2.1 Introduction ..................................................................................................... 344
20.2.2 Possible causes of error .................................................................................. 344
20.2.3 Sequence for finding errors in the control loop ............................................... 345
20.2.4 Checking the analog speed command interface ............................................. 346
20.2.5 Adjusting the electrical offset (drift adjustment) ............................................. 349
20.2.6 Speed adjustment at the servo amplifier (tachometer adjustment) ................ 352
20.2.7 Corrective action .............................................................................................. 354
21 Visual Display Unit .......................................................................................................... 355
21.1 Introduction ............................................................................................................... 355
21.2 Possible Causes of Errors ......................................................................................... 355
21.3 Troubleshooting......................................................................................................... 356
21.4 Corrective Action ....................................................................................................... 358
22 Keyboard Unit .................................................................................................................. 359
22.1 Introduction ............................................................................................................... 359
22.2 Front View of the Keyboard Units ............................................................................ 360
22.3 Possible Causes of Error ........................................................................................... 362
22.4 Checking the Keys..................................................................................................... 363
22.5 Checking the Potentiometers.................................................................................... 367
22.6 Checking the Touchpads ........................................................................................... 370
22.7 Corrective Action ....................................................................................................... 371
22.8 Key Matrix of the Keyboard Units ............................................................................. 372
22.9 Key Matrix of the Keyboard Units ............................................................................. 388
23 Machine Operating Panel................................................................................................ 389
23.1 Introduction ............................................................................................................... 389
23.2 Possible Causes of Errors ......................................................................................... 390
23.3 Checking the Power Supply ...................................................................................... 391
23.4 Checking the Keys..................................................................................................... 392
23.5 Checking the Outputs ............................................................................................... 397
23.6 Corrective Action ....................................................................................................... 398
HEIDENHAIN Service Manual iTNC 530