HEIDENHAIN TNC 640 (34059x-05) Cycle programming - Manual (Page 294)

Cycles: Special Functions
11.6 CONTOUR TURNING INTERPOLATION (Cycle 292, DIN/ISO: G292,
software option 96)
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TNC 640 | User's Manual Cycle Programming | 1/2015
The spindle orientation is calculated as follows:
Machining TO Spindle orientation
Interpolation turning, outside 1 ORI + Q336
Interpolation turning, inside 7 ORI + Q336 + 180
Interpolation turning, outside 7 ORI + Q336 + 180
Interpolation turning, inside 1 ORI + Q336
Interpolation turning, outside 8,9 ORI + Q336
Interpolation turning, inside 8,9 ORI + Q336
You can use the following tool types for interpolation
turning:
TYPE: ROUGH, with the machining directions TO: 1 or 7
TYPE: FINISH, with the machining directions TO: 1 or 7
TYPE: BUTTON, with the machining directions TO: 1 or 7
For inside machining, the TNC checks whether
the active tool radius is smaller than half the
contour start diameter Q491 plus the clearance to
side Q357. If the check shows that the tool is too
large, the program is aborted.
The following tool types cannot be used for
interpolation turning:
(error message "Function
not possible with this tool type" is displayed)
TYPE: ROUGH, with the machining directions
TO: 2 to 6
TYPE: FINISH, with the machining directions
TO: 2 to 6
TYPE: BUTTON, with the machining directions
TO: 2 to 6
TYPE: RECESS
TYPE: RECTURN
TYPE: THREAD