HEIDENHAIN TNC 320 User Manual page 34

Contents
6 Programming contours................................................................................................................ 223
6.1 Tool movements.................................................................................................................................. 224
Path functions....................................................................................................................................... 224
FK free contour programming.............................................................................................................. 224
Miscellaneous functions M...................................................................................................................224
Subprograms and program section repeats......................................................................................... 225
Programming with Q parameters......................................................................................................... 225
6.2 Fundamentals of path functions....................................................................................................... 226
Programming tool movements for workpiece machining..................................................................... 226
6.3 Approaching and departing a contour............................................................................................. 230
"From" and "To" points........................................................................................................................... 230
Overview: Types of paths for contour approach and departure............................................................232
Important positions for approach and departure...................................................................................233
Approaching on a straight line with tangential connection: APPR LT................................................... 235
Approaching on a straight line perpendicular to the first contour point: APPR LN............................... 235
Approaching on a circular path with tangential connection: APPR CT..................................................236
Approaching on a circular path with tangential connection from a straight line to the contour:
APPR LCT.............................................................................................................................................. 237
Departing in a straight line with tangential connection: DEP LT.......................................................... 238
Departing in a straight line perpendicular to the last contour point: DEP LN....................................... 238
Departing on a circular path with tangential connection: DEP CT........................................................239
Departing on a circular arc tangentially connecting the contour and a straight line: DEP LCT..............239
Path contours  Cartesian coordinates........................................................................................... 240
6.4
Overview of path functions.................................................................................................................. 240
Straight line L........................................................................................................................................241
Inserting a chamfer between two straight lines...................................................................................242
Rounded corners RND.......................................................................................................................... 243
Circle center CC....................................................................................................................................244
Circular path C around circle center CC............................................................................................... 245
CircleCR with defined radius................................................................................................................ 246
Circle CT with tangential connection....................................................................................................248
Example: Linear movements and chamfers with Cartesian coordinates.............................................. 249
Example: Circular movements with Cartesian coordinates.................................................................. 250
Example: Full circle with Cartesian coordinates................................................................................... 251
34
HEIDENHAIN | TNC 320 | Conversational Programming User's Manual | 9/2016