HEIDENHAIN iTNC 530 (60642x-03) - Manual (Page 391)

HEIDENHAIN iTNC 530 391
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.4 Miscellaneous functions f
o
r cont
our
ing beha
vior
Automatic retraction of tool from the contour at
an NC stop: M148
Standard behavior
At an NC stop the TNC stops all traverse movements. The tool stops
moving at the point of interruption.
Behavior with M148
The TNC retracts the tool by 0.1 mm in the direction of the tool axis if,
in the LIFTOFF column of the tool table, you set the parameter Y for the
active tool (see "Tool table: Standard tool data" on page 178).
LIFTOFF takes effect in the following situations:
 An NC stop triggered by you
 An NC stop triggered by the software, e.g. if an error occurred in the
drive system
 When a power interruption occurs. The path that the TNC
withdraws if a power interruption occurs is set by your machine tool
builder in machine parameter 1160
Effect
M148 remains in effect until deactivated with M149.
M148 becomes effective at the start of block, M149 at the end of
block.
The M148 function must be enabled by the machine tool
builder.
Danger of collision!
Remember that, especially on curved surfaces, the
surface can be damaged during return to the contour.
Retract the tool before returning to the contour!