HEIDENHAIN iTNC 530 (60642x-04) ISO programming - Manual (Page 394)

394 Programming: Special Functions
11
.5 Global Pr
ogr
am Set
tings (sof
tw
ar
e option)
 Additional data range:
 Lift-off height :
Set-up clearance by which the TNC moves the tool in the direction
of the positive tool axis if a position exceeds a limit plane. Effect
of the value is incremental. If you have entered 0 here, the tool
stops at the point of exit.
 Approach clearance :
Advance stop distance to which the TNC positions the tool once
the tool has returned to within the traverse range. The effect of
the value is incremental on the point of reentry.
Positioning logic
The TNC uses the following positioning logic to move between the
point of exit and the point of reentry:
 If defined, the TNC retracts the tool by the lift-off height in the
positive tool-axis direction
 Then the TNC positions the tool on a straight line to the point of
reentry. If defined, the TNC moves the point of reentry by the
approach clearance
in the positive tool-axis direction
 Then the TNC moves the tool to the point of reentry and continues
running the program