HEIDENHAIN TNC 620 User Manual page 36

Contents
6 Programming contours................................................................................................................ 235
6.1 Tool movements.................................................................................................................................. 236
Path functions....................................................................................................................................... 236
FK free contour programming (option 19)............................................................................................ 236
Miscellaneous functions M...................................................................................................................236
Subprograms and program section repeats......................................................................................... 237
Programming with Q parameters......................................................................................................... 237
6.2 Fundamentals of path functions....................................................................................................... 238
Programming tool movements for workpiece machining..................................................................... 238
6.3 Approaching and departing a contour............................................................................................. 241
"From" and "To" points........................................................................................................................... 241
Tangential approach and departure....................................................................................................... 243
Overview: Types of paths for contour approach and departure............................................................244
Important positions for approach and departure...................................................................................245
Approaching on a straight line with tangential connection: APPR LT................................................... 247
Approaching on a straight line perpendicular to the first contour point: APPR LN............................... 247
Approaching on a circular path with tangential connection: APPR CT..................................................248
Approaching on a circular path with tangential connection from a straight line to the contour:
APPR LCT.............................................................................................................................................. 249
Departing in a straight line with tangential connection: DEP LT.......................................................... 250
Departing in a straight line perpendicular to the last contour point: DEP LN....................................... 250
Departing on a circular path with tangential connection: DEP CT........................................................251
Departing on a circular arc tangentially connecting the contour and a straight line: DEP LCT..............251
Path contours  Cartesian coordinates........................................................................................... 252
6.4
Overview of path functions.................................................................................................................. 252
Programming path functions.................................................................................................................252
Straight line in rapid traverse G00 or straight line with feed rate F G01.............................................. 253
Inserting a chamfer between two straight lines...................................................................................254
Rounded corners G25........................................................................................................................... 255
Circle center I, J................................................................................................................................... 256
Circular path around circle center.........................................................................................................257
CircleG02/G03/G05 with defined radius............................................................................................... 258
Circle G06 with tangential connection..................................................................................................260
Example: Linear movements and chamfers with Cartesian coordinates.............................................. 261
Example: Circular movements with Cartesian coordinates.................................................................. 262
Example: Full circle with Cartesian coordinates................................................................................... 263
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HEIDENHAIN | TNC 620 | ISO Programming User's Manual | 9/2016