HEIDENHAIN TNC 640 (34059x-01) Cycle programming - Manual (Page 347)

HEIDENHAIN TNC 640 347
13.21 RECESSING CONT
OUR, AXIAL (Cy
c
le 870)
13.21 RECESSING CONTOUR, AXIAL
(Cycle 870)
Application
This cycle enables you to axially cut in slots of any form (face
recessing).
You can use the cycle either for roughing, finishing or complete
machining. Turning is run paraxially with roughing.
Roughing cycle run
The TNC uses the tool position as cycle starting point when a cycle is
called. If the Z coordinate of the starting point is less than the contour
starting point, the TNC positions the tool in the Z coordinate to the
contour starting point and begins the cycle there.
1 The TNC positions the tool at rapid traverse in the X coordinate
(first cut-in position).
2 The TNC runs a paraxial infeed motion at rapid traverse (lateral
infeed = 0.8 tool edge width).
3 The TNC machines the area between the starting position and end
point in an axial direction at the defined feed rate Q478.
4 The TNC positions the tool back at rapid traverse to the beginning
of cut.
5 The TNC repeats this process (2 to 4) until the slot form is
completed.
6 The TNC positions the tool back at rapid traverse to the cycle
starting point.