Siemens SINUMERIK 840D sl Function Manual page 14

Contents
5.2 Temperature compensation ...................................................................................................... 345
5.2.1 Description of functions............................................................................................................. 345
5.2.2 Commissioning.......................................................................................................................... 348
5.2.2.1 Temperature-dependent parameters ........................................................................................ 348
5.2.2.2 Temperature compensation type and activation ....................................................................... 348
5.2.2.3 Maximum compensation value per IPO clock cycle ................................................................. 349
5.2.3 Example .................................................................................................................................... 349
5.2.3.1 Commissioning the temperature compensation for the Z axis of a lathe.................................. 349
5.3 Backlash compensation ............................................................................................................ 352
5.3.1 Description of functions............................................................................................................. 352
5.3.2 Commissioning.......................................................................................................................... 353
5.3.2.1 Backlash.................................................................................................................................... 353
5.3.2.2 Weighting factor for backlash.................................................................................................... 354
5.3.2.3 Applying the backlash compensation step-by-step................................................................... 354
5.4 Interpolatory compensation....................................................................................................... 355
5.4.1 General properties .................................................................................................................... 355
5.4.2 Compensation of leadscrew errors and measuring system errors ........................................... 358
5.4.2.1 Description of functions............................................................................................................. 358
5.4.2.2 Commissioning.......................................................................................................................... 360
5.4.2.3 Example .................................................................................................................................... 363
5.4.3 Compensation of sag and angularity errors .............................................................................. 364
5.4.3.1 Description of functions............................................................................................................. 364
5.4.3.2 Commissioning.......................................................................................................................... 368
5.4.3.3 Examples................................................................................................................................... 372
5.4.4 Direction-dependent leadscrew error compensation ................................................................ 381
5.4.4.1 Description of functions............................................................................................................. 381
5.4.4.2 Commissioning.......................................................................................................................... 382
5.4.4.3 Example .................................................................................................................................... 386
5.4.5 Extension of the sag compensation with NCU link - only 840D sl ............................................ 389
5.4.6 Special features of interpolatory compensation ........................................................................ 397
5.5 Dynamic feedforward control (following error compensation)................................................... 399
5.5.1 General properties .................................................................................................................... 399
5.5.2 Speed feedforward control ........................................................................................................ 401
5.5.3 Torque feedforward control - only 840D sl (option) .................................................................. 403
5.5.4 Dynamic response adaptation .................................................................................................. 405
5.5.5 Forward feed control for command- and PLC axes .................................................................. 406
5.5.6 Secondary conditions................................................................................................................ 408
5.6 Friction compensation (quadrant error compensation) ............................................................. 409
5.6.1 General properties .................................................................................................................... 409
5.6.2 Conventional friction compensation .......................................................................................... 410
5.6.2.1 Conventional friction compensation .......................................................................................... 410
5.6.2.2 Commissioning of conventional friction compensation ............................................................. 412
5.6.3 Quadrant error compensation using neural networks - only 840D sl........................................ 421
5.6.3.1 Fundamentals ........................................................................................................................... 421
5.6.3.2 Parameterization of neural QEC ............................................................................................... 423
5.6.3.3 Learning the neural network...................................................................................................... 429
5.6.3.4 Commissioning of neural QEC.................................................................................................. 434
5.6.3.5 Further optimization and intervention options ........................................................................... 437
5.6.3.6 Quick commissioning ................................................................................................................ 443
5.7 Circularity test ........................................................................................................................... 446
5.8 Measures for hanging (suspended axes).................................................................................. 451
5.8.1 Electronic counterweight ........................................................................................................... 451
14
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions