HEIDENHAIN MANUALplus 4110 - Manual (Page 351)

HEIDENHAIN MANUALplus 4110 351
6.16 Under
c
ut Cy
cles
Undercut type H G857
The cycle G857 machines an undercut. The end point is determined
from the plunging angle in accordance with "Undercut type H." At the
end of cycle, the tool returns to the starting point.
Parameters
 X contour corner (diameter value)
 Z contour corner
 K undercut length
 R radius —no input: No circular element (tool radius = undercut
radius)
 W plunge angle —no input: W is determined from "K" and "R."
Example: G857
%857.nc
[G857]
N1 T21 G95 F0.23 G96 S248 M3
N2 G0 X60 Z2
N3 G857 X50 Z-30 K7 R2 W30
END
„ Undercuts can only be executed in orthogonal, paraxial
contour corners along the longitudinal axis.
„ Cutting radius compensation: Active.
„ Oversizes: are not taken into account.