HEIDENHAIN TNC 426B (280 472) ISO programming - Manual (Page 123)

107 HEIDENHAIN TNC 410, TNC 426, TNC 430
6.4 P
ath Cont
ours — Car
tesian Coor
dinat
es
Circular path G06 with tangential approach
The tool moves on an arc that starts at a tangent with the previously
programmed contour element.
A transition between two contour elements is called “tangential”
when there is no kink or corner at the intersection between the two
contours — the transition is smooth.
The contour element to which the tangential arc connects must be
programmed immediately before the G06 block. This requires at
least two positioning blocks.
6 ú Enter the coordinates of the arc end point.
Further entries, if necessary:
ú Feed rate F
ú Miscellaneous function M
Example NC blocks
N70 G01 G41 X+0 Y+25 F300 M3 *
N80 X+25 Y+30 *
N90 G06 X+45 Y+20 *
N100 G01 Y+0 *
A tangential arc is a two-dimensional operation: the
coordinates in the G06 block and in the contour element
preceding it must be in the same plane of the arc.
X
Y
25 45
25
30
20
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