Omron NY532-1500 Reference Manual page 566

4 Axes Group Instructions
If the start point and the end point are the same point,
a complete circle is drawn with the start point and the
border point as the diameter. PathChoice is specified
as the circular interpolation direction.
Center
The current position is the starting point. Circular
interpolation is performed for circle specified by the
center point AuxPoint(X,Y) to the end point End-
Point(X,Y). PathChoice is used to specify the circular
interpolation direction. A complete circle is drawn
when the start point and end point are at the same
point. If the radius from the specified center to the
start point is different to the radius to the end point,
the average of the two radiuses is used to perform
circular interpolation. In this case, the center is calcu-
lated in the same way as specifying the radius, and
the calculated radius and center are used.
Precautions for Correct Use 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 Circular
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
divided 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 End-
Point(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. Path-
Choice is used to specify the circular interpolation
direction.
Precautions for Correct Use 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.
4-48
Y
AuxPoint(X, Y)
Start point, EndPoint(X, Y)
Y
AuxPoint(X, Y)
Start point
Y
Start point
NY-series Motion Control Instructions Reference Manual (W561)
X
EndPoint(X, Y)
X
Negative radius
EndPoint(X, Y)
Positive radius
X