Rotation angle of circular interpolation axis (X axis-Y axis)
The rotation angle of the circular interpolation axis in the 3-axis helical interpolation control is as follows.
True circle
Y axis
Number of pitch
0
1
2
n
999
The setting of the true circle is available only when "Start point = End point" is set for the 3-axis helical interpolation (ABS/INC,
center point).
When "degree" is set to "[Pr.1] Unit setting", the positioning range of the absolute system is 0 to 359.99999. If
the rotation angle is 360 or larger in the circular interpolation axis (X axisY axis), the tangent control and
normal line control cannot be performed because 360 or larger angle cannot be set for "[Da.6] Positioning
address/movement amount" of the linear interpolation axis (Z axis: degree). To perform the tangent control or
normal line control with the rotation of 360 or larger angle, use the incremental system.
Error compensation of the circular interpolation axis
In the 3-axis helical interpolation control with center point designation, as well as the 2-axis circular interpolation control,
"[Pr.41] Allowable circular interpolation error width" is enabled. When a circular interpolation error occurs, the path of the 2-
axis circular interpolation control (X axisY axis) becomes spiral as shown below.
Y axis
Circular
interpolation
error
3 MAJOR POSITIONING CONTROL
96
3.2 Setting the Positioning Data
Downloaded from
ManualsNet.com
θ = 360°
Start point = End point
X axis
Control of the circular interpolation axis
True circle
360
720
360n
360999
End point
θ
Start point
X axis
search engine
Other than the true circle
Y axis
θ
Other than the true circle
360 + θ
720 + θ
360 n + θ
360 999 + θ
End point
Start point
X axis