HEIDENHAIN MANUALplus 4110 - Manual (Page 126)

126 4 Cycle Programming
4.4 Roughing Cy
cles
Roughing and finishing an inside contour
The shaded area from "AP" (starting point of contour)
to "EP" (contour end point) is first rough-machined
with the cycle "Cut longitudinal—Expanded," taking
oversizes into account (see figure at upper right). This
contour area is to be finished subsequently with the
cycle "Finishing cut longitudinal—Expanded" (see
figure at lower right).
The rounding and the chamfer at the contour end are
also machined in "expanded mode."
The parameters for contour starting point X1, Z1 and
contour end point X2, Z2 determine the cutting and
infeed directions—in this example, internal machining
and infeed in negative X-axis direction.
Tool data
„ Lathe tool (for internal machining)
„ WO = 7—Tool orientation
„ A = 93°—Tool angle
„ B = 55°—Point angle