HEIDENHAIN TNC 620 User Manual page 32

Contents
6 Programming: Programming Contours......................................................................................207
6.1 Tool movements.................................................................................................................................. 208
Path functions....................................................................................................................................... 208
FK free contour programming (option 19)............................................................................................ 208
Miscellaneous functions M...................................................................................................................208
Subprograms and program section repeats......................................................................................... 209
Programming with Q parameters......................................................................................................... 209
6.2 Fundamentals of path functions....................................................................................................... 210
Programming tool movements for workpiece machining..................................................................... 210
6.3 Approaching and departing a contour............................................................................................. 214
"From" and "To" points........................................................................................................................... 214
Overview: Types of paths for contour approach and departure............................................................216
Important positions for approach and departure...................................................................................217
Approaching on a straight line with tangential connection: APPR LT................................................... 219
Approaching on a straight line perpendicular to the first contour point: APPR LN............................... 219
Approaching on a circular path with tangential connection: APPR CT..................................................220
Approaching on a circular path with tangential connection from a straight line to the contour:
APPR LCT.............................................................................................................................................. 221
Departing in a straight line with tangential connection: DEP LT.......................................................... 222
Departing in a straight line perpendicular to the last contour point: DEP LN....................................... 222
Departing on a circular path with tangential connection: DEP CT........................................................223
Departing on a circular arc tangentially connecting the contour and a straight line: DEP LCT..............223
Path contours  Cartesian coordinates........................................................................................... 224
6.4
Overview of path functions.................................................................................................................. 224
Straight line L........................................................................................................................................225
Inserting a chamfer between two straight lines...................................................................................226
Rounded corners RND.......................................................................................................................... 227
Circle center CC....................................................................................................................................228
Circular path C around circle center CC............................................................................................... 229
CircleCR with defined radius................................................................................................................ 230
Circle CT with tangential connection....................................................................................................232
Example: Linear movements and chamfers with Cartesian coordinates.............................................. 233
Example: Circular movements with Cartesian coordinates.................................................................. 234
Example: Full circle with Cartesian coordinates................................................................................... 235
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HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2015