Machining open contours: m98 – HEIDENHAIN TNC 360 User Manual User Manual
Page 122
TNC 360
5-38
5
Programming Tool Movements
Fig. 5.45:
Tool path without M98
Fig. 5.46:
Tool path with M98
5.6
M-Functions for Contouring Behavior and Coordinate Data
Machining open contours: 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.
Programming example
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L X ... Y ... RL F .. ................................................ Move to contour point 10
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L X .. IY–.. ... M98 ............................................... Move to contour point 11
12
L IX + .. ... ........................................................... Move to contour point 12
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10
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