HEIDENHAIN TNC 640 (34059x-04) ISO programming - Manual (Page 211)

Path contours - Cartesian coordinates 6.4
6
TNC 640 | User's Manual for DIN/ISO Programming | 3/2014
211
Inserting a chamfer between two straight lines
The chamfer enables you to cut off corners at the intersection of
two straight lines.
The line blocks before and after the G24 block must be in the
same working plane as the chamfer.
The radius compensation before and after the
G24 block must
be the same
The chamfer must be machinable with the current tool
Chamfer side length: Length of the chamfer, and
if necessary:
Feed rate F (effective only in G24 block)
Example NC blocks
N70 G01 G41 X+0 Y+30 F300 M3 *
N80 X+40 G91 Y+5 *
N90 G24 R12 F250 *
N100 G91 X+5 G90 Y+0 *
You cannot start a contour with a G24 block.
A chamfer is possible only in the working plane.
The corner point is cut off by the chamfer and is not
part of the contour.
A feed rate programmed in the CHF block is effective
only in that block. After the block, the previous feed
rate becomes effective again.