05.91
3.11
Scale modification G50, G51
This function substantially reduces the extent of programming work for geometrically similar
parts.
•
A scale modification becomes effective with the programming of G51
•
G51 is modal and is only removed by G50 (cancellation of scale modification)
•
The scale modification refers to a reference point P
(X, Y) of P
are specified by programming. If X and Y are not specified, the control
B
generates the values X=0 and Y=0 (reference point = workpiece zero).
•
The value for the scale factor is specified at address "P..." in the range 0.00001 to 99.999
•
The following values are recalculated by scale modification
– Axis coordinates
– Interpolation parameters
– Radius
– Programmable ZO
– Lead, lead decrease or increase.
•
The scale centre is limited to a maximum of 5 axis values. Axis values can be programmed
which are not defined in the mode group.
•
If the part program is processed in the NC channel, the scale centre is written into the
setting data "NC scale centre".
•
The scale modification is linked to an "empty buffer" (@714). This function is triggered
internally by block preparation.
Example: possible representations in the program
a)
N...
N...
G51
X70
Y30
N...
X
Y
or
b)
N...
N...
G51
P1.5
LF
N...
X70
Y30
LF
N...
X
Y
Y
30
© Siemens AG 1991 All Rights Reserved
SINUMERIK 880, (PG)
P1.5
LF
6ZB5 410-0HD02
3 Directions of Movement, Dimensioning
3.11 Scale modification G50, G51
(scale centre). The coordinates
B
P
B
X
70
3–27