HEIDENHAIN TNC 640 (34059x-01) Cycle programming - Manual (Page 313)

HEIDENHAIN TNC 640 313
13.12 TURN SHOULDER F
A
CE EXTENDED (Cy
c
le 822)
13.12 TURN SHOULDER FACE
EXTENDED (Cycle 822)
Application
This cycle enables you to face turn shoulders. Expanded scope of
function:
„ You can insert a chamfer or curve at the contour start and contour
end.
„ In the cycle you can define angles for the face and circumferential
surfaces
„ You can insert a radius in the contour edge
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
The TNC uses the tool position as cycle starting point when a cycle is
called. If the starting point is within the area to be machined, the TNC
positions the tool in the Z coordinate and then in the X coordinate to
set-up clearance and begins the cycle there.
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 the
end point in the plane direction at the defined feed rate Q478.
3 The TNC returns the tool at the defined feed rate by one 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.