HEIDENHAIN TNC 426 B, User Manual

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227 HEIDENHAIN TNC 426 B, TNC 430
AXIS-SPECIFIC SCALING (Cycle 26)
Before programming, note the following:
Coordinate axes sharing coordinates for arcs must be
enlarged or reduced by the same factor.
You can program each coordinate axis with its own axis-
specific scaling factor.
In addition, you can enter the coordinates of a center for
all scaling factors.
The size of the contour is enlarged or reduced with
reference to the center, and not necessarily (as in Cycle
11 SCALING FACTOR) with reference to the active
datum.
Effect
The SCALING FACTOR becomes effective as soon as it is defined in
the program. It is also effective in the Positioning with MDI mode of
operation. The active scaling factor is shown in the additional status
display.
ú
Axis and scaling factor: Enter the coordinate axis/axes
as well as the factor(s) involved in enlarging or
reducing. Enter a positive value up to 99.999 999.
ú
Center coordinates: Enter the center of the axis-
specific enlargement or reduction.
The coordinate axes are selected with soft keys.
Cancellation
Program the AXIS-SPECIFIC SCALING cycle once again with a
scaling factor of 1 for the same axis.
Example
Axis-specific scaling factors in the working plane
Preset: Quadrangle (see figure at lower right)
Corner 1: X = 20.0 mm Y = 2.5 mm
Corner 2: X = 32.5 mm Y = 15.0 mm
Corner 3: X = 20.0 mm Y = 27.5 mm
Corner 4: X = 7.5 mm Y = 15.0 mm
■ Enlarge X axis by factor 1.4
■ Reduce Y axis by factor 0.6
■ Center at CCX = 15 mm CCY = 20 mm
Resulting NC blocks
CYCL DEF 26.0 axis-spec. scaling
CYCL DEF 26.1 X1.4 Y0.6 CCX+15 CCY+20
8.7 Coor
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X
Y
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X
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kkap8.pm6 30.06.2006, 07:04 227
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