HEIDENHAIN CNC Pilot 4290 Description of the Y axis - Manual (Page 8)

Y Axis 8
2.2.1
Contours
in
the
XY
Plane
(Front
and
Back)
Circular arc G172/G173 Geo
G172/G173 defines a circular arc in a contour of the XY plane. The
direction of rotation is visible in the help graphic.
”Chamfer/rounding B” defines the transition to the next contour
element. When entering a chamfer/rounding, program the
theoretical end point of the contour element.
”Intersection selection Q” specifies the end point if the path
intersects an arc and the end point is not defined.
Parameters
X, Y: End point (X radius dimension)
I, J: Center point (I=X-, J=Y-direction; I radius dimension)
R: Radius
Q: Selection of point of intersection – default: 0
■ For transition to line segment:
Q=0: Near intersection
Q=1: Far intersection
■ For transition to circular arcs:
Q=0: Far intersection
Q=1: Near intersection
B: Chamfer/rounding
■ B no entry: Tangential transition
■ B=0: Nontangential transition
■ B>0: Radius of rounding
■ B<0: Width of chamfer
Programming
■ X, Y: Absolute, incremental, modal or ”?”
■ I, J: Absolute or incremental.
■ End point cannot also be the starting point (no
complete circle)
G172
G173
Y_4290BH.pm6 08.03.2005, 08:35 8