HEIDENHAIN SW 68894x-02 - Manual (Page 195)

HEIDENHAIN CNC PILOT 640 195
4.4
Tu
rn
ing
cy
cles
Roughing and finishing an inside contour
The shaded area from AP (starting point of contour) to EP (contour end
point) is rough-machined with the cycle Plunge longitudinal—
expanded,
taking oversizes into account. This contour area is to be
finished subsequently with the cycle Finishing cut longitudinal—
expanded.
The rounding arc 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
 Turning tool (for internal machining)
 WO = 7 (tool orientation)
 A = 93° (tool angle)
 B = 55° (point angle)