HEIDENHAIN TNC 640 (34059x-01) - Manual (Page 18)

18
6.1 Tool Movements ..... 178
Path functions ..... 178
FK free contour programming ..... 178
Miscellaneous functions M ..... 178
Subprograms and program section repeats ..... 178
Programming with Q parameters ..... 178
6.2 Fundamentals of Path Functions ..... 179
Programming tool movements for workpiece machining ..... 179
6.3 Contour Approach and Departure ..... 183
Overview: Types of paths for contour approach and departure ..... 183
Important positions for approach and departure ..... 184
Approaching on a straight line with tangential connection: APPR LT ..... 186
Approaching on a straight line perpendicular to the first contour point: APPR LN ..... 186
Approaching on a circular path with tangential connection: APPR CT ..... 187
Approaching on a circular arc with tangential connection from a straight line to the contour: APPR LCT ..... 188
Departing on a straight line with tangential connection: DEP LT ..... 189
Departing on a straight line perpendicular to the last contour point: DEP LN ..... 189
Departing on a circular path with tangential connection: DEP CT ..... 190
Departing on a circular arc tangentially connecting the contour and a straight line: DEP LCT ..... 190
6.4 Path Contours—Cartesian Coordinates ..... 191
Overview of path functions ..... 191
Straight line L ..... 192
Inserting a chamfer between two straight lines ..... 193
Corner rounding RND ..... 194
Circle center CCI ..... 195
Circular path C around circle center CC ..... 196
Circular path CR with defined radius ..... 197
Circular path CT with tangential connection ..... 199
6.5 Path Contours—Polar Coordinates ..... 204
Overview ..... 204
Zero point for polar coordinates: pole CC ..... 205
Straight line LP ..... 205
Circular path CP around pole CC ..... 206
Circular path CTP with tangential connection ..... 207
Helical interpolation ..... 208
6 Programming: Programming Contours ..... 177