Heidenhain MANUALplus 4110 User Manual Page 172

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172 4 Cycle Programming
4.6 Thread and Undercut Cycles
Recut (longitudinal) thread
Call the thread-cutting menu.
Select the "Thread cycle."
Press the Recut soft key.
Inner thread soft key
On: Internal thread
Off: External thread
The cycle reworks a single-start thread. Since you have already
unclamped the workpiece, MANUALplus needs to know the exact
position of the thread. For this, place the cutting edge of the tap drill
in the center of a groove and transfer the positions to the parameters
C and ZC by pressing the Take over position soft key. From these
values the cycle then calculates the angle of the spindle at the starting
point Z.
Cycle parameters
Z2 end point of thread
C measured angle
ZC measured position
F1 thread pitch (= feed rate)
U thread depth
No input: Depth is calculated
External thread: U=0.6134*F1
Internal thread: U=–0.5413*F1
I 1st cutting depth
I<U: First cut with cutting depth I—further cuts: Reduction of
cutting depth
I=U: One cut
No input: Calculation from U and F1
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