Siemens SINUMERIK 880 GA2

4 Programming of Motion Blocks 05.91
4.2.4 Cylindrical interpolation
N120 G92 P . . C
L
F
Designation of rotary axis
Relationship of working diameter to unit diameter
Selection of cylindrical interpolation
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 (
360
) = 114.59156 mm
Cylindrical interpolation, cylinder development
44
40
R20
Y/mm
Working dia-
meter=84 mm
B (rotary axis)
0
22
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0 40 76 103 130 267 294 321 360 Degrees
0 28 56 76 96 196 216 236 263.9 Circumferential dimensions for the working
diameter (mm)
Groove width 24 mm
Depth 2 mm
140
124
U=d· =263.89378 mm P =
Working diameter
Unit diameter
P =
84 mm
114.59156 mm
= 0.73304
N05 G16 B Y Z
L
F
(Plane definition)
N10 G92 P0.73304 B
L
F
(Selection of cylindrical interpolation)
N15 G42 D10
L
F
(Cutter radius compensation)
N20 G00 B0 Y0
L
F
(Approach start point)
N25 G01 Z . . . F . . . S . . . M . . .
L
F
(Infeed in Z)
N30 G01 B40 Y22
L
F
(Straight line)
N35 G03 B76 Y44 U20
L
F
(Radius)
N40 G01 B103 Y124
L
F
(Straight line)
:
N85 G92 P1 B
L
F
(Deselection of cylindrical interpolation)
The radius ”R20” is traversed in the Y and B axes.
4–16
© Siemens AG 1991 All Rights Reserved 6ZB5 410-0HD02
SINUMERIK 880, (PG)