HEIDENHAIN TNC 620 (340 56x-01) - Manual (Page 160)

160
6.4 P
a
th Cont
ours—Car
te
sian Coor
dinat
e
s
Inserting a chamfer CHF between two straight
lines
The chamfer enables you to cut off corners at the intersection of two
straight lines.
„ The blocks before and after the CHF block must be in the same
working plane.
„ The radius compensation before and after the chamfer 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 (only effective in CHF block)
Example NC blocks
X
Y
40
12 30
5
12
5
7 L X+0 Y+30 RL F300 M3
8 L X+40 IY+5
9 CHF 12 F250
10 L IX+5 Y+0
You cannot start a contour with a CHF 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 CHF block, the previous feed rate
becomes effective again.