X
Y
EndPoint(X, Y)
AuxPoint(X, Y)
Start point
Precautions for Correct Use
If the Correction Allowance Ratio axes group parameter is set to any value other than 0 and
the specified center point exceeds the circle that is calculated with the following formula, a Cir-
cular Interpolation Center Specification Position Out of Range error (error code: 5449 hex) will
occur
.
• The radius of the circle in which the center point must be positioned is the calculated radius
multiplied by the percentage that is set for the center point specification check method divid-
ed by 100. (The radius calculated from the corrected center point is taken as 100%.)
Radius
The current position is the starting point. Circular interpolation is performed for the circle specified by
the radius AuxPoint(X,Y) to the end point EndPoint(X,Y).
The radius is specified by the first element in AuxPoint(X,Y). The second element is not used.
For example, for a radius of 100, set AuxPoint(X,Y) to AuxPoint(100,0).
If the sign of the radius is negative, a circle with a long arc will be drawn. If the sign is positive, a circle
with a short arc will be drawn.
PathChoice is used to specify the circular interpolation direction.
X
Y
EndPoint(X, Y)
Start poi
nt
Positive radius
Negative radius
Precautions for Correct Use
• If the start point and the end point are the same, a same circular interpolation start and end
point error will occur and operation will stop for all axes in the group.
•
If the specified radius is less than half the length of the distance between the start point and
end point, a circle is impossible and an error will occur.
4 Axes Group Instructions
4-53
NY-series Motion Control Instructions Reference Manual (W561)
MC_MoveCircular2D
4
Function
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