HEIDENHAIN CNC Pilot 4290 - Manual (Page 243)

HEIDENHAIN CNC PILOT 4290 231
Arc
Use the menu symbol to select the direction of arc rotation and give
the arc a dimension.
The set the type of dimensioning by soft key (see table).
Arc
Select the direction of rotation.
Parameters ”end point of arc”
X, Z:
End point in Cartesian coordinates
Xi, Zi: Distance from starting point to end point
P,
α:
End point in polar coordinates (reference angle
α: positive Z-
axis)
Pi, αi: End point polar, incremental (Pi: Linear distance from starting
to end point; reference of
αi: see illustration)
Parameters ”center of arc”
I, K:
Center (XM radius dimension)
Ii, Ki: Distance from starting point to center point
PM, β: Center in polar coordinates (reference angle β: positive Z-axis)
PMi, βi: Center polar, incremental (PMi: Linear distance from starting
point to center; Reference of βi: Angle between an imaginary
line intersecting the starting point and parallel to the Z-axis,
and another line from the starting point to the center)
Other parameters
R:
Arc radius
Tangential/nontangential: Specify the transition to the
next contour element
”Angle” parameters
WA:
Angle between positive Z-axis and tangent in starting point of
arc
WE: Angle between positive Z-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.
6.5 Finished P
a
rt
Cont
our