Mitsubishi Electric RD77MS2 User Manual page 105

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
circular interpolation control (X axisY axis) becomes spiral as shown below.
Y axis
Circular
interpolation
error
Rotation direction when the linear interpolation axis (Z axis) is set in degrees
When "degree" is set to "[Pr.1] Unit setting" for the linear interpolation axis, the rotation direction is determined depending on
the axis control data in "[Cd.40] ABS direction in degrees" of the reference axis. To set a rotation direction for each positioning
data, set "[Da.28] ABS direction in degrees" of each positioning data.
End point
Start point
X axis
3 MAJOR POSITIONING CONTROL
3.2 Setting the Positioning Data
3
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