HEIDENHAIN CNC Pilot 4290 - Manual (Page 153)

HEIDENHAIN CNC PILOT 4290 141
■ ”Feed rate stop” becomes effective at
the end of a thread cut.
■ Feed rate override is not in effect.
■ Spindle override is not in effect.
■ Make thread with G95 (feed rate per
revolution).
■ Look-ahead is switched off.
Single thread G32
G32 cuts a simple thread in any desired direction and position
(longitudinal, tapered or transverse thread; internal or external thread)
without look-ahead function. G32 calculates the thread from the
”thread end point,” ”thread depth” and the tool position. The main
machining direction of the tool determines whether an internal or an
external thread will be machined.
First infeed = ”remainder” of the division of thread depth/cutting depth
Parameters
X, Z: End point of thread (X diameter)
F: Thread pitch
P: Thread depth
I: Maximum cutting depth
B: Remainder cuts – default: 0
■ B=0: Division of the ”last cut” into 1/2, 1/4, 1/8 and 1/8 cut
■ B=1: No remaining cut division
Q: Number of air cuts after the last cut (for reducing the cutting
pressure in the thread base) – default: 0
K: Run-out length at thread end – default: 0
W: Taper angle (range: –45° < W < 45°) – default: 0; position of the
taper thread with reference to longitudinal or transverse axis.
■ W>0: Rising contour (in machining direction)
■ W<0: Falling contour
C: Starting angle (thread start is defined with respect to rotationally
nonsymmetric contour elements) – default: 0
H: Type of tool offset (offset of the individual approaches to smooth
the thread flanks) – default: 0
■ H=0: No offset
■ H=1: Offset to the left
■ H=2: Offset to the right
■ H=3: Offset alternating left and right
4.8 T
h
re
a
d
C
y
cles
Cycle run
1 Calculate the cut segmentation.
2 Execute a thread cut.
3 Return at rapid traverse and approach for next pass.
4 Repeat 3 to.4 until the complete thread has been cut.
5 Execute idle cuts.
6 Return to starting point.