HEIDENHAIN TNC 406 - Manual (Page 110)

HEIDENHAIN TNC 406, TNC 416 89
6.2 Cont
our Appr
oac
h
and Depar
tur
e
Approaching the starting point S in the spindle axis
When the starting point S is approached, the spindle axis is moved to
working depth.
If there is danger of collision:
Approach the starting point in the spindle axis separately.
Example:
The electrode retains the Z coordinate and moves in the XY plane to
the start position.
The electrode is positioned in the Z axis to working depth.
End point
Similar requirements hold for the end point E:
„ Approachable without danger of collision
„
Near the last contour point
„ Avoids damage to tool and the workpiece
The ideal location for the end point E is again on the extended tool path
outside the hatched area. It is approached without radius
compensation.
Departure from an end point in the spindle axis
The spindle axis is moved separately.
Example:
The electrode retains the Z coordinate and moves in the XY plane to
the end position.
The electrode moves to set-up clearance.
L X ... Y ...
L Z-10
L X ... Y ... R0
L Z+50
S
A
E
R0
E