HEIDENHAIN CNC Pilot 4290 Description of the Y axis - Manual (Page 47)

HEIDENHAIN CNC PILOT 4290 47
4.1.2
Contours
in
the
XY
Plane
(Front
and
Back)
Example: Arc CCW (dimensioning of the center
point)
Arc
When entering an arc, use the menu symbol to select the direction
of rotation and assign dimensions to the arc.
Parameter ”end point of arc”
X, Y: End point in Cartesian coordinates (X radius dimension)
Xi, Yi: Distance from starting point to end point
P,
α : End point in polar coordinates (reference angle α : positive X
axis)
Pi, α i: End point polar, incremental. Pi: Linear distance from
starting to end point; Reference of α i: Angle between an
imaginary line intersecting the starting point and parallel to
the X axis, and another line from the starting point to the
end point.
Parameter ”center of arc”
XM, YM: Center point (XM radius dimension)
XMi, YMi: Distance from starting point to end point in X and Y
directions
PM, β : Center point, polar (reference angle β : positive X axis)
PMi, β i: Center polar, incremental. PMi: Linear distance from
starting point to center; Reference of β i: Angle between an
imaginary line intersecting the starting point and parallel to
the X axis, and another line from the starting point to the
center
Other parameters
Radius: Arc radius
Tangential/nontangential: Specify the transition to the next contour
element
WA: Angle between positive X axis and tangent in starting point
of arc
WE: Angle between positive X axis and tangent in end point of
arc
WV: Angle between preceding element and tangent in the
starting point of the arc
WN: Angle between tangent in arc end point and following
element
WV, WN:
■ The angle leads from the preceding/succeeding element
counterclockwise to the new element.
■ Arc as preceding/succeeding element: Angle to tangent.
Example: Arc CCW (dimensioning of the end
point)
Y_4290BH.pm6 08.03.2005, 08:36 47