4 cont our nag es – coor données car tésiennes – HEIDENHAIN TNC 426B (280 472) ISO programming Manuel d'utilisation
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106
6 Programmation: Programmer les contours
6.4 Cont
our
nag
es – coor
données car
tésiennes
Angle au centre CCA et rayon R de l‘arc de cercle
Le point initial et le point final du contour peuvent être reliés
ensemble par quatre arcs de cercle différents et de même rayon:
Petit arc de cercle: CCA<180°
Rayon de signe positif R>0
Grand arc de cercle: CCA>180°
Rayon de signe négatif R<0
Au moyen du sens de rotation, vous définissez si la courbure de
l‘arc de cercle est dirigée vers l‘extérieur (convexe) ou vers
l‘intérieur (concave):
Convexe: sens de rotation G02 (avec correction de rayon G41)
Concave: sens de rotation G03 (avec correction de rayon G41)
Exemple de séquences CN
Cf. figures de droite.
N100 G01 G41 X+40 Y+40 F200 M3 *
N110 G02 X+70 Y+40 R+20 * (arc 1)
ou
N110 G03 X+70 Y+40 R+20 * (arc 2)
ou
N110 G02 X+70 Y+40 R-20 * (arc 3)
ou
N110 G03 X+70 Y+40 R-20 * (arc 4)
L‘écart entre le point initial et le point final du diamètre
du cercle ne doit pas être supérieur au diamètre du
cercle.
Le rayon max. est de 99 999 mm
(TNC 410: 9999 mm).
Fonction autorisée pour les axes angulaires A, B et C.
X
Y
ZW
R
R
40
40
70
1
2
G03
G02
X
Y
40
40
70
G03
4
ZW
3
R
R
G02
Gkap6.pm6
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- iTNC 530 (606 42x-01) ISO programming
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- iTNC 530 (606 42x-02) ISO programming
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