HEIDENHAIN TNC 406 - Manual (Page 90)

HEIDENHAIN TNC 406, TNC 416 69
4.7 P
ar
amet
ers in the Er
osion T
able
Minimum undersize (UNS)
The electrode diameter (Re) must be smaller than the cavity diameter
by at least the value of the minimum undersize UNS.
„ Roughing
For roughing, the minimum undersize UNS is calculated from the
two-times gap 2G and the maximum surface roughness R
max
.
„ Finishing and polishing
For finishing and polishing, the minimum undersize UNS is equal to
the two-times gap 2G. (The maximum surface roughness R
max
can
be disregarded.)
Selecting the actual undersize UM
„ For a simple cavity (movement only in the electrode axis):
UNS = UM
„
For contour eroding and eroding with DISC cycle
(movement of the electrode in all axes): UM
≥
UNS
Auxiliary parameters AUX 1, AUX 2, ... AUX 6
G R
max
UM
2
UNS
2
e
=
The machine tool builder can assign functions to up to six
auxiliary parameters. Refer to your machine tool manual.