HEIDENHAIN MANUALplus 4110 - Manual (Page 170)

170 4 Cycle Programming
4.6 Thr
ead and Under
c
ut Cy
cles
API thread
Call the thread-cutting menu.
Select "API thread."
Inner thread soft key
On: Internal thread
Off: External thread
This cycle cuts a single or multi-start API external or internal thread.
The depth of thread decreases at the overrun at the end of thread.
Cycle parameters
 X, Z starting point
 X1, Z1 starting point of thread (without run-in)
 X2, Z2 end point of thread (without run-out)
 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
 W taper angle: Range: –45° < W < 45°
 WE run-out angle: Range: 0° < WE < 90°
 J remaining cutting depth —default: 1/100 mm
 T tool number
 S spindle speed / cutting speed
 D number of thread starts —default: 1 single-start thread
Parameter combinations for taper angle:
„ X1/Z1, X2/Z2
„ X1/Z1, Z2, W
„ Z1, X2/Z2, W