HEIDENHAIN TNC 640 (34059x-01) Cycle programming - Manual (Page 317)

HEIDENHAIN TNC 640 317
13.13 TURN, TRANS
V
ER
SE PLUNGE (Cy
c
le 823)
13.13 TURN, TRANSVERSE PLUNGE
(Cycle 823)
Application
This cycle enables you to face turn plunge elements (undercuts).
You can use the cycle either for roughing, finishing or complete
machining. Turning is run paraxially with roughing.
The cycle can be used for inside and outside machining. If the start
diameter Q491 is larger than the end diameter Q493, the cycle runs
outside machining. If the start diameter Q491 is less than the end
diameter Q493, the cycle runs inside machining.
Roughing cycle run
In undercutting the TNC runs the infeed with feed rate Q478. The
return movements are then each at set-up clearance.
1 The TNC runs a paraxial infeed motion at rapid traverse. The infeed
value is calculated by the TNC with Q463 MAX. CUTTING DEPTH.
2 The TNC machines the area between the starting position and end
point in the plane direction at the defined feed rate.
3 The TNC returns the tool at the defined feed rate Q478 by the
infeed value.
4 The TNC positions the tool back at rapid traverse to the beginning
of cut.
5 The TNC repeats this process (1 to 4) until the final contour is
completed.
6 The TNC positions the tool back at rapid traverse to the cycle
starting point.