HEIDENHAIN TNC 640 User Manual page 324

11
Cycles: Special Functions | INTERPOLATION TURNING, CONTOUR FINISHING (Cycle 292, DIN/ISO: G292,
Cycle run, Q560=0: Contour milling
1 The M3/M4 function programmed before the cycle call remains
in effect.
2 No spindle stop and
is not taken into account.
3 The TNC positions the tool to the contour start radius Q491,
taking the selected machining operation inside/outside Q529
and the clearance to side Q357 into account. The described
contour is not automatically extended by a set-up clearance.
An extension of the contour must be programmed in the
subprogram. At the beginning of the machining operation, the
TNC positions the tool at rapid traverse in the tool axis direction
to the contour starting point!
material at the contour starting point!
4 The TNC machines the defined contour with the spindle rotating
(M3/M4). In the process, the reference axes of the working
plane move on a circle; the TNC does not orient the tool spindle.
5 At the end point of the contour, the TNC retracts the tool
perpendicularly by the set-up clearance.
6 Finally, the TNC retracts the tool to the clearance height.
324
no spindle orientation are performed. Q336
Make sure that there is no
HEIDENHAIN | User's manual for cycle programming | 10/2017
software option 96)