Siemens SINUMERIK 880 Programming Manual page 74

4 Programming of Motion Blocks
4.2.4 Cylindrical interpolation
N120 G92 P . . C L F
For P < 1 note that the interpolation resolution of the rotary axis with cylindrical interpolation
active is 1/p times greater than without cylindrical interpolation. The action of the working
diameter is modal until a new programming is performed or resetting is effected with M02/M30
or RESET.
As long as the working diameter is not equal to the unit diameter, interpolation of this axis
(e.g. C) is only possible with one further axis, i.e. for interpolation with more than 2 axes the
working diameter must be set to be equal to the unit diameter.
Example: Cylindrical interpolation
Working diameter =84 mm, unit diameter (
Y/mm
140
124
44
40
22
0
0 40 76 103 130
0 28 56 76 96
Cylindrical interpolation, cylinder development
U=d· =263.89378 mm
L F
N05 G16 B Y Z
L F
N10 G92 P0.73304 B
L F
N15 G42 D10
L F
N20 G00 B0 Y0
N25 G01 Z . . . F . . . S . . . M . . .
L F
N30 G01 B40 Y22
N35 G03 B76 Y44 U20
L F
N40 G01 B103 Y124
:
L F
N85 G92 P1 B
The radius "R20" is traversed in the Y and B axes.
4–16
Designation of rotary axis
Relationship of working diameter to unit diameter
Selection of cylindrical interpolation
360
) = 114.59156 mm
R20
267 294 321 360
196 216 236 263.9 Circumferential dimensions for the working
Working diameter
P =
Unit diameter
L F
L F
© Siemens AG 1991 All Rights Reserved
Working dia-
meter=84 mm
Groove width 24 mm
Depth 2 mm
B (rotary axis)
Degrees
diameter (mm)
84 mm
P =
114.59156 mm
(Plane definition)
(Selection of cylindrical interpolation)
(Cutter radius compensation)
(Approach start point)
(Infeed in Z)
(Straight line)
(Radius)
(Straight line)
(Deselection of cylindrical interpolation)
SINUMERIK 880, (PG)
05.91
= 0.73304
6ZB5 410-0HD02