HEIDENHAIN TNC 407 (280 580) User Manual User Manual
Page 163

TNC 425/TNC 415 B/TNC 407
5-64
5
Programming Tool Movements
Fig. 5.56:
Path with M98
Fig. 5.55:
Path without M98
M Functions for Contouring Behavior
S
S
11
12
10
.
.
.
Machining open corners: M98
Standard behavior – without M98
The TNC calculates the intersections
S
of the
radius-compensated tool paths and changes
traverse direction at these points. If the corners are
open on one side, however, machining is incom-
plete.
Machining open corners with M98
With the miscellaneous function M98 the TNC
temporarily suspends radius compensation to
ensure that both corners are completely machined.
Duration of effect
The miscellaneous function M98 is effective only
in the blocks in which it is programmed.
Program example
10
L X ... Y ... RL F .. ................................................ Move to contour point 10
11
L X .. IY–.. ... M98 ............................................... Machine contour point 11
12
L IX + .. ... ........................................................... Move to contour point 12
.
.
.
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