Siemens Sinumerik 840D Operating Turning page 105

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Chamfering of contour corners

For a defined breaking of the edges as a chamfer between linear and cir-

cular contours the control provides a variety of means.

It is only necessary to program the points of intersection of the contour

without any chamfers (see illustration below, P1 - P3).

The corners are broken automatically following the block where they have

been programmed.

Chamfer with statement of the leg length

Statement of the length of the chamfer

Programming example:

N40 G42 G00 X0 Z2

N60 X50 CHR=10

N70 Z-40 CHF=30

N80 X80 Z-80

N110 G40 G00 X200 Z300

840D/828D SINUMERIK Operate

Explanation:

Straight to P1, length of the

leg of the chamfer = 10 mm

Straight to P2, chamfer length = 30 mm

Straight to P3,

Retraction of the tool

Unselection of the radius correction, at

rapid traverse to the tool changing point

End of program

Finished contour

Programmed contour

Sinumerik 828d