Siemens SINUMERIK 880 Programming Manual page 119

05.91
Example:
X
P4
P3
P6
W
22
25
Flank infeed, longitudinal thread with constant lead
Lead h = 2 mm
Thread depth t = 1.3 mm
Infeed angle e= 60°
X = (46-38.7)/2 = 3.65
1
Z = X ·tan e/2 = 2.136
1 1
X = 3.65+1.3/2 = 4.3
2
Z = X ·tan e/2 = 2.483
2 2
Absolute position data input:
L F
N30 G90 S . . .
N35 G00 X46 Z80.483
L F
N40 X38.7 Z78.347
N45 G33 Z22 K2 L F
L F
N50 G00 X46
L F
N55 Z80.483
L F
N60 X37.4 Z78
L F
N65 G33 Z22 K2
L F
N70 G00 X46
© Siemens AG 1991 All Rights Reserved
SINUMERIK 880, (PG)
50
78
L F (P1)
(P2)
(P3)
(P4)
(P1)
(P5)
(P6)
(P4)
6ZB5 410-0HD02
4 Programming of Motion Blocks
4.3.3 Thread with variable lead
X= 46 Z=80.483
P1
P2
P5
37.4 38.7 40
Z
4–61