5 cy cles f or mac hining p oint p a tt er ns – HEIDENHAIN TNC 426B (280 472) ISO programming User Manual
Page 205
189
HEIDENHAIN TNC 410, TNC 426, TNC 430
5 The tool subsequently moves to the last point on the second line
where it carries out the machining operation.
6 From this position, the tool approaches the starting point for the
next machining operation in the negative main axis direction.
7 This process (5 to 6) is repeated until all machining operations in
the second line have been executed.
8 The tool then moves to the starting point of the next line.
9 All subsequent lines are processed in a reciprocating movement.
ú
Starting point 1st axis Q225 (absolute value):
Coordinate of the starting point in the main axis of the
working plane
ú
Starting point 2nd axis Q226 (absolute value):
Coordinate of the starting point in the secondary axis
of the working plane
ú
Spacing in 1st axis Q237 (incremental value): Spacing
between the individual points on a line
ú
Spacing in 2nd axis Q238 (incremental): Spacing
between the individual lines
ú
Number of columns Q242: Number of machining
operations on a line
ú
Number of lines Q243: Number of passes
ú
Angle of rotation Q224 (absolute value): Angle by
which the entire pattern is rotated. The center of
rotation lies in the starting point.
ú
Set-up clearance Q200 (incremental value): Distance
between tool tip and workpiece surface.
ú
Workpiece surface coordinate Q203 (absolute value):
Coordinate of the workpiece surface
ú
2nd set-up clearance Q204 (incremental value):
Coordinate in the tool axis at which no collision
between tool and workpiece (clamping devices) can
occur.
The TNC 426, TNC 430 with NC software 280 474-xx
also provides:
ú
Traversing to clearance height Q301: definition of how
the tool is to move between machining processes:
0: Move to set-up clearance
1: Move to 2nd set-up clearance
8.5 Cy
cles f
or Mac
hining P
oint P
a
tt
er
ns
X
Z
Q200
Q203
Q204
X
Y
Q226
Q225
Q224
Q238
Q237
N = Q242
N = Q243
Example NC block:
N54 G221 Q225=+15 Q226=+15 Q237=+10
Q238=+8 Q242=6 Q243=4 Q224=+15
Q200=2 Q203=+0 Q204=50*
Kkap8.pm6
29.06.2006, 08:06
189