HEIDENHAIN MANUALplus 4110 - Manual (Page 330)

330 6 DIN Programming
6.13 Recessing Cy
cles
Simple recessing cycle G86
G86 machines simple radial/axial inside and outside recesses with
chamfers. From the "tool orientation," the control determines the type
of recess (radial/axial; inside/outside, see “Lathe tools” on page 419).
Parameters
 X base corner X (diameter value)
 Z base corner Z
 I oversize
„ Radial recess: Oversize for precutting
„ Axial recess: Recess width—no input: A single cut is machined
(recess width = tool width).
 K width
„ Radial recess: Recess width—no input: A single cut is machined
(recess width = tool width).
„ Axial recess: Oversize for precutting
 E dwell time (for finishing)—default: length of time for one
revolution
Note on the execution of the cycle:
„ If you program an oversize, the control always rough-machines the
recess first. In the second step, the recess is then finish-machined.
„ If you do not wish to cut the chamfers, you must position the tool at
a sufficient distance from the workpiece. Calculation for radial
recess:
XS = XK + 2 * (1.3 – b)
XS: Starting position (diameter value)
XK: Contour diameter
b: Chamfer width
The starting position is calculated accordingly for an axial recess.
„ At the end of the cycle, the tool is located at:
„ For radial recess:
„ X: Starting position
„ Z: Last recess position
„ For axial recess:
„ X: Last recess position
„ Z: Starting position
Example: G86
%86.nc
[G86]
N1 T30 G95 F0.15 G96 S200 M3
N2 G0 X62 Z2
N3 G86 X54 Z-30 I0.2 K7 E2 [radial]
N4 G14 Q0
N5 T38 G95 F0.15 G96 S200 M3
N6 G0 X120 Z1
N7 G86 X102 Z-4 I7 K0.2 E1 [axial]
END
„ Cutter radius compensation: is not carried out.
„ Oversizes: are not taken into account.