HEIDENHAIN MANUALplus 4110 - Manual (Page 158)

158 4 Cycle Programming
4.5 Recessing c
y
cles
Undercut type U
Call the recessing menu.
Select the "Undercut U" cycle.
This cycle machines an "Undercut type U" and, if programmed,
finishes the adjoining plane surface. The undercut is executed in
several passes if the undercut width is greater than the cutting width
of the tool. If the cutting width of the tool is not defined, the control
assumes that the tool's cutting width equals K. A chamfer or rounding
(optional) is machined.
Cycle parameters
 X, Z starting point
 X1, Z1 contour corner
 X2 end point on plane surface
 I undercut diameter
 K width of undercut
 B chamfer/rounding
„ B>0: Radius of rounding
„ B<0: Width of chamfer
 T tool number
 S spindle speed / cutting speed
 F feed per revolution
Cycle run
1 Calculate the proportioning of cuts.
2 Pre-position to safety clearance from X, Z.
3 Move at feed rate to "undercut diameter I" and remain at this
position for the time of two revolutions.
4 Retract and approach for next pass.
5 Repeat steps 3 to 4 until corner point Z1 is reached.
6 After the last pass, finish adjoining plane surface, starting from end
point X2", if defined.
7 Machine chamfer/rounding, if defined.
8 Return to starting point on diagonal path.