Siemens SINUMERIK 808D Programming And Operating Manual page 108

Format
There are two different types of scaling.
Scaling along all axes with the same scaling factor
G51 X... Y... Z... P... ; Start scaling
G50; Deselection of scaling
X, Y, Z: Center coordinate value for the scaling (absolute command)
P: Scaling factor
Scaling along each individual axis with different scaling factors
G51 X... Y... Z... I... J... K... ; Start scaling
G50; Deselection of scaling
X, Y, Z: Reference point of scaling (absolute command)
I, J, K: Scaling factor for the X-, Y- and Z-axis
The type of the scaling factor depends on MD22914 $MC_AXES_SCALE_ENABLE.
$MC_AXES_SCALE_ENABLE = 0:
The scaling factor is specified with "P". If "I,J,K" is programmed in this setting, the setting data 42140
$SC_DEFAULT_SCALE_FACTOR_P is used for the scaling factor.
$MC_AXES_SCALE_ENABLE = 1:
The scaling factor is specified with "I,J,K". If only "P" is programmed in this MD setting, the setting data 43120
$SA_DEFAULT_SCALE_FACTOR_AXIS is used for the scaling factors.
Weighting of scaling factors
The scaling factors are multiplied either with 0.001 or 0.00001. The factors are selected with MD22910
$MC_WEIGHTING_FACTOR_FOR_SCALE=0, scaling factor 0.001, $MC_WEIGHTING_FACTOR_FOR_SCALE=1, scaling
factor 0.00001.
The workpiece zero is always the reference point for the scaling. A reference point cannot be programmed.
Programmable mirroring (negative scaling)
A mirror image can be created with a negative value of the axial scaling factor.
To do this, MD22914 $MC_AXES_SCALE_ENABLE = 1 must be active. If I, J or. K is omitted from the blocks with G51, the
values preset in the setting data 43120 $SA_DEFAULT_SCALE_FACTOR_AXIS are activated.
Example
_N_0512_MPF
N10 G17 G90 G00 X0 Y0
N30 G90 G01 G94 F6000
N32 M98 P0513
N34 G51 X0. Y0. I-1000 J1000
N36 M98 P0513
N38 G51 X0. Y0. I-1000 J-1000
N40 M98 P0513
N42 G51 X0. Y0. I1000 J-1000
N44 M98 P0513
N46 G50
N50 G00 X0 Y0
N60 M30
_N_0513_MPF
N10 G90 X10. Y10.
N20 X50
N30 Y50
N40 X10. Y10.
N50 M99
108
;(Part program)
;Start position for the approach motion
;1) Contour programmed as in the subroutine
;2) Contour, mirrored on X
;3) Contour, mirrored on X and Y
;4) Contour, mirrored on Y
;Deselection of scaling and mirroring
;(Subroutine of 00512)
Programming and Operating Manual (ISO Turning/Milling)
01/2017