Siemens SINUMERIK 828D Function Manual page 11

3 B1: Continuous­path Mode, Exact Stop, LookAhead ..............................................................................147
3.1 Brief Description ...................................................................................................................... 147
3.2 Exact stop mode...................................................................................................................... 150
3.3 Continuous-path mode ............................................................................................................ 154
3.3.1 General functionality ................................................................................................................ 154
3.3.2 Velocity reduction according to overload factor ....................................................................... 156
3.3.3 Blending ................................................................................................................................... 158
3.3.3.1 Rounding according to a path criterion (G641) ........................................................................ 161
3.3.3.2 Rounding in compliance with defined tolerances (G642/G643) .............................................. 163
3.3.3.3 Rounding with maximum possible axial dynamic response (G644) ........................................ 166
3.3.3.4 Rounding of tangential block transitions (G645) ...................................................................... 169
3.3.4 LookAhead .............................................................................................................................. 171
3.3.4.1 Standard functionality .............................................................................................................. 171
3.3.4.2 Free-form surface mode: Extension function ........................................................................... 176
3.4 Dynamic adaptations ............................................................................................................... 180
3.4.1 Smoothing the path velocity .................................................................................................... 180
3.4.2 Adaptation of the dynamic path response ............................................................................... 183
3.4.3 Determination of the dynamic response limiting values .......................................................... 187
3.4.4 Interaction between the "smoothing of the path velocity" and "adaptation of the path dynamic
response" functions ................................................................................................................. 188
3.4.5 Dynamic response mode for path interpolation ....................................................................... 191
3.4.6 Free-form surface mode: Basic functions ................................................................................ 193
3.5 Compressor functions.............................................................................................................. 197
3.5.1 NC block compression ............................................................................................................. 197
3.5.2 Combining short spline blocks (option for 828D) ..................................................................... 201
3.6 Contour/Orientation tolerance ................................................................................................. 203
3.7 Tolerance and compression of G0 blocks ............................................................................... 206
3.8 RESET response..................................................................................................................... 209
3.9 Supplementary conditions ....................................................................................................... 210
3.9.1 Block change and positioning axes ......................................................................................... 210
3.9.2 Block change delay ................................................................................................................. 210
3.9.3 Rounding and repositioning (REPOS) ..................................................................................... 210
3.10 Data lists.................................................................................................................................. 212
3.10.1 Machine data ........................................................................................................................... 212
3.10.1.1 General machine data ............................................................................................................. 212
3.10.1.2 Channel­specific machine data ............................................................................................... 212
3.10.1.3 Axis/spindle­specific machine data .......................................................................................... 213
3.10.2 Setting data ............................................................................................................................. 213
3.10.2.1 Channel­specific setting data .................................................................................................. 213
3.10.3 Signals ..................................................................................................................................... 214
3.10.3.1 Signals from channel ............................................................................................................... 214
3.10.3.2 Signals from axis/spindle ......................................................................................................... 214
4 B2: Acceleration ......................................................................................................................................215
4.1 Brief description....................................................................................................................... 215
4.1.1 General .................................................................................................................................... 215
4.1.2 Features .................................................................................................................................. 215
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Table of contents
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