HEIDENHAIN TNC 426B (280 472) ISO programming - Manual (Page 129)

113 HEIDENHAIN TNC 410, TNC 426, TNC 430
Straight line at rapid traverse G10
Straight line with feed rate G11 F . . .
The tool moves in a straight line from its current position to the
straight-line end point. The starting point is the end point of the
preceding block.
11 ú Polar coordinates radius R: Enter distance from the
straight line end point to the pole I, J
ú Polar-coordinates angle H: Angular position of the
straight-line end point between –360° and +360°
The sign of H depends on the angle reference axis:
Angle from angle reference axis to R is
counterclockwise: H>0
Angle from angle reference axis to R is clockwise:
H<0
Example NC blocks
N120 I+45 J+25 *
N130 G11 G42 R+30 H+0 F300 M3 *
N140 H+60 *
N150 G91 H+60 *
N160 G90 H+180 *
Circular path G12/G13/G15 around pole I, J
The polar coordinate radius R is also the radius of the arc. It is
defined by the distance from the starting point to the pole I, J. The
last programmed tool position before the G12, G13 or G15 block is
the starting point of the arc.
Direction
■ In clockwise direction: G12
■ In counterclockwise direction: G13
■ Without direction indication: G15
The TNC traverses the circular arc with the last programmed
direction of rotation.
13 ú Polar coordinates angle H: Angular position of thearc
end point between –5400° and +5400°
Example NC blocks
N180 I+25 J+25 *
N190 G11 G42 R+20 H+0 F250 M3 *
N200 G13 H+180 *
X
Y
25=I
25=J
R20
6.5 P
ath Cont
ours — P
olar Coor
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Gkap6.pm6 29.06.2006, 08:06 113