HEIDENHAIN CNC PILOT 640 - Undercutting Form H, K, U Unit

smart.Turn units | Units – Recessing
2
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017
103
Undercutting form H, K, U unit
Depending on KG, the unit machines one of the following
undercuts:
Form U: The unit machines an undercut and finishes the
adjoining plane surface. Either a chamfer or a rounding arc can
be machined
Form H: The end point of the undercut is determined from the
plunging angle
Form K: Only one linear cut at an angle of 45° is performed. The
resulting contour geometry therefore depends on the tool that
is used
First, you select the Type of undercut KG, and
then you enter the values for the selected type of
undercut
The control changes parameters with the same
address letters for the other undercuts as well. Do
not change these values
Unit name: G85x_H_K_U / cycle: G85
Further information: "Undercut cycle G85", Page 361
Contour form:
KG: Type of undercut
Form U G856
Further information: "Undercut type U G856", Page 369
Form H G857
Further information: "Undercut type H G857", Page 370
Form K G858
Further information: "Undercut type K G858", Page 370
X1, Z1: Contour corner
Undercut type U:
X2: End point transv.
I: Undercut diameter
K: Undercut lgth.
B: -B cham./+B round.
B > 0: Radius of rounding
B < 0: Width of chamfer
Undercut type H:
K: Undercut lgth.
R: Radius in the undercut corner
W: Plunging angle
Undercut type K:
I: Undercut depth
Further forms:
Further information: " smart.Turn units", Page 77
Access to the technology database:
Machining operation: Finishing
Affected parameters: F, S