Heidenhain MANUALplus 4110 User Manual Page 174

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174 4 Cycle Programming
4.6 Thread and Undercut Cycles
Recut (longitudinal) thread—Expanded
Call the thread-cutting menu.
Select the "Thread cycle."
Press the Expanded soft key.
Press the Recut soft key.
Inner thread soft key
On: Internal thread
Off: External thread
This cycle recuts a single or multi-start external or internal 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 (without run-out)
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 down to J.
I=U: One cut
No input: Calculation from U and F1
A feed angle (default: 30°): Range: –60° < A < 60°
A<0: Infeed on left thread flank
A>0: Infeed on right thread flank
J remaining cutting depth—default: 1/100 mm
D number of thread starts—default: 1 single-start thread
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