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HEIDENHAIN TNC 407 (280 580) User Manual User Manual

Page 163

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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

5.7

M Functions for Contouring Behavior

S

S

11

12

10

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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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