HEIDENHAIN CNC Pilot 4290 - Manual (Page 78)

4 DIN PLUS 66
4.2.3 Contour Programming
The ”contour follow-up” function and contour-turning
cycles require the previous description of the blank
and finished part. For milling and drilling with the C or Y
axis, contour definition is a precondition if you wish to
use fixed cycles.
Remember with Contours for turning:
■ Describe a continuous contour.
■ The direction of the contour description is
independent of the direction of machining.
■ CNC PILOT closes open contours paraxially.
■ Contour descriptions must not extend beyond the
turning center.
■ The contour of the finished part must lie within the
contour of the blank part.
■ When machining bars, only define the required
section as blank.
■ Contour definitions are valid for the complete NC
program, even if the workpiece is rechucked for
machining the rear face.
■ In the fixed cycles you program ”reference values”
referenced to the contour description.
4.2 Basics of Pr
ogr
amming
Continued
The CNC PILOT supports the use of variables and
mathematical expressions as address parameters.
Editing address parameters
Call the dialog box.
Place the cursor in the required input box.
■ Enter/edit values, or
■ CONTINUE soft key: The ”Extended input” dialog
box appears
■ Program ”?” (simplified geometry programming).
■ Switch from ”Incremental” to ”Absolute,” or
vice versa.
■ Activate the input of variables.
CNC PILOT only shows the ”Extended
inputs” permitted in the respective input
box.