Heidenhain CNC Pilot 4290 V7.1 Description of B and Y axes User Manual download pdf (Page 21)

HEIDENHAIN CNC PILOT 4290 21

1.3 Programming Notes

Drilling and milling in a tilted plane

HEIDENHAIN recommends tilting the coordinate system in such a

way that you can define the drilling patterns and milling contours in the

YZ plane. This has the advantage that you can then use all the contour,

figure and pattern definitions for the YZ plane.

The drilling and milling cycles themselves are executed in the tilted

plane. These cycles determine the position of the tilted plane from the

contour definitions.

It is also a good idea to tilt the B axis with G714 because this G

function includes the calculation of the tool position.

The following programming sequence is thus recommended:

 Rotate and shift the coordinate system for the tilted plane with the

section code SURFACE_Y (see “SURFACE_Y section” on page 23).

 Define the drilling patterns and milling contours in the YZ plane.

 Position the B axis with G714.

 Activate the YZ plane with G19.

 Use the drilling and milling cycles for machining.

Alternatively, you can tilt the working plane with G16 and then execute

the machining operations in the tilted plane.

Please note that the tool orientation is not regenerated automatically

when you position the B axis with the single commands G0 or G15.

Program G712 to have the tool position recalculated.

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Heidenhain CNC Pilot 4290 V7.1 Description of B and Y axes User Manual Page 21