HEIDENHAIN CNC Pilot 4290 - Manual (Page 199)

HEIDENHAIN CNC PILOT 4290 187
4.18.3 Full-Surface Machining
The term ”full-surface machining” refers to the machining of the front
and rear ends in one NC program. The CNC PILOT supports full-
surface machining for all common machine designs. The features
include angle-synchronous part transfer with rotating spindle,
traversing to a stop, controlled parting, and coordinate transformation.
This ensures efficient full-surface machining and simple programming.
You describe the turning contour, the contours for the C axis (or Y axis)
as well as full-surface machining functions in one NC program. Expert
programs are available for configuring the lathe. You can also use full-
surface machining functions for single-spindle lathes.
Fundamentals
Rear-face contours with C axis: The XK axis and therefore also the C
axis are oriented relative to the workpiece, not to the spindle.
Therefore, for the rear face:
■ Orientation of the XK axis: ”To the left” (front end: ”to the right”)
■ Orientation of the C axis: ”Clockwise”
■ Rotational direction for arcs, G102: ”Counterclockwise”
■ Rotational direction for arcs, G103: ”Clockwise”
Rear-face contours with Y axis: The X axis is also oriented relative to
the workpiece. Therefore, for the rear face:
■ Orientation of the X axis: ”To the left” (front end: ”to the right”).
■ Rotational direction for arcs, G2: ”Counterclockwise.”
■ Rotational direction for arcs, G3: ”Clockwise.”
Turning: The CNC PILOT supports full-surface machining with
conversion and mirroring functions so that rear-face machining also
follows the principle:
■ Program a positive value to depart the workpiece.
■ Program a negative valueto approach the workpiece.
The machine manufacturer usually supplies your lathe with suitable
expert programs for workpiece transfer.
Front face
Rear face
4.18 Notes and Examples