HEIDENHAIN MANUALplus 4110 - Manual (Page 166)

166 4 Cycle Programming
4.6 Thr
ead and Under
c
ut Cy
cles
Thread cycle (longitudinal)—Expanded
Call the thread-cutting menu.
Select the "Thread cycle."
Press the Expanded soft key.
Inner thread soft key
On: Internal thread
Off: External thread
This cycle cuts a single or multi-start external or internal thread. The
thread starts at starting point X and ends at end point Z2 (without a
thread run-in or run-out).
Cycle parameters
 X, Z starting point of thread (without run-in)
 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
 J remaining cutting depth —default: 1/100 mm
 D number of thread starts —default: 1 single-start thread
 E incremental gradient —default: 0
„ E=0: Constant pitch
„ E>0: Increase the pitch per revolution by E
„ E<0: Decrease the pitch per revolution by E
 T tool number
 S spindle speed / cutting speed