HEIDENHAIN MANUALplus 4110 - Manual (Page 178)

178 4 Cycle Programming
4.6 Thr
ead and Under
c
ut Cy
cles
Recut API thread
Call the thread-cutting menu.
Select "API thread."
Press the Recut soft key.
Inner thread soft key
On: Internal thread
Off: External thread
The cycle recuts a single or multi-start API 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
 X1, Z1 starting point of thread (without run-in)
 X2, 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
„ Icutting 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
 W taper angle: Range: –45° < W < 45°
 WE run-out angle: Range: 0° < WE < 90°
 J remaining cutting depth —default: 1/100 mm