HEIDENHAIN MANUALplus 4110 Pilot - Manual (Page 26)

26
Thr
eadcut cy
cle gr
oup
Thread cycle (longitudinal) – Expanded
This cycle cuts a single- or multi-start thread. With the function key,
you can determine whether an external or internal thread is to be
machined. The thread starts at the “start point X“ and ends at the “end
point Z2“ (without a thread run-in or run-out).
Information on the cycle parameters:
F1:
Thread pitch (is evaluated for the feed rate)
U: Thread depth – default:
• external threads: U=0.6134*F1
• internal threads: U=–0.5413*F1
I: 1st cutting depth – no input: I is calculated automatically
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 grooves – default: 1 (= single-start thread)
E: Incremental pitch (increases/reduces the pitch per revolution
by E) – default: 0
• “Cycle STOP“ only becomes effective
at the end of a thread cut.
• The feed rate and spindle speed over-
rides are disabled during execution of
the cycle.
• The function “Last cut” can be acti-
vated at the end of the cycle. The last
thread cut is repeated, allowing
handwheel compensation.