HEIDENHAIN iTNC 530 (340 422) ISO programming - Manual (Page 349)

HEIDENHAIN iTNC 530 349
8
.7 SL Cy
cles G
roup II
CYLINDER SURFACE (Cycle G127,
software option 1)
This cycle enables you to program a contour in two dimensions and
then roll it onto a cylindrical surface for 3-D machining. Use Cycle G128
if you wish to mill guide notches onto the cylinder surface.
The contour is described in a subprogram identified in Cycle G37
CONTOUR GEOMETRY.
The subprogram contains coordinates in a rotary axis and in its parallel
axis. The rotary axis C, for example, is parallel to the Z axis. The
available path functions are G1, G11, G24, G25 and G2/G3/G12/G13
with R.
The dimensions in the rotary axis can be entered as desired either in
degrees or in mm (or inches). You can select the desired dimension
type in the cycle definition.
1 The TNC positions the tool over the cutter infeed point, taking the
allowance for side into account.
2 At the first plunging depth, the tool mills along the programmed
contour at the milling feed rate Q12.
3 At the end of the contour, the TNC returns the tool to the setup
clearance and returns to the point of penetration.
4 Steps 1 to 3 are repeated until the programmed milling depth Q1
is reached.
5 Then the tool moves to the set-up clearance.
C
Z
Machine and control must be specially prepared by the
machine tool builder for use of this cycle.