Interpolation Control - Mitsubishi Electric MELSEC iQ-R Series User Manual

Interpolation control

Meaning of interpolation control
In "2-axis linear interpolation control", "3-axis linear interpolation control", "4-axis linear interpolation control", "2-axis fixed-
feed control", "3-axis fixed-feed control", "4-axis fixed-feed control", "2-axis speed control", "3-axis speed control", "4-axis
speed control", "2-axis circular interpolation control", and "3-axis helical interpolation control", each control is performed so
that linear and arc paths are drawn using a motor set in two to four axis directions. This kind of control is called "interpolation
control".
In interpolation control, the axis in which the control method is set is defined as the "reference axis", and the other axis is
defined as the "interpolation axis".
The Motion module controls the "reference axis" following the positioning data set in the "reference axis", and controls the
"interpolation axis" corresponding to the reference axis control so that a linear or arc path is drawn.
The following table shows the reference axis and interpolation axis combinations.
: Setting not required (Use the initial value or a value within the setting range.)
Interpolation control set in "[Da.2]
Control method"
2-axis linear interpolation control
2-axis fixed-feed control
2-axis circular interpolation control
2-axis speed control
3-axis linear interpolation control
3-axis fixed-feed control
3-axis speed control
4-axis linear interpolation control
4-axis fixed-feed control
4-axis speed control
The combinations of axes available for the 3-axis helical interpolation control are the same as the ones for the "3-axis linear
interpolation control", "3-axis fixed-feed control", and "3-axis speed control". The following table shows the combinations of
the reference axis, circular interpolation axis, and linear interpolation axis for the 3-axis helical interpolation control.
Interpolation control set in
"[Da.2] Control method"
3-axis helical interpolation control
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Axis definition
Reference axis
4-axis module:
Any of axes 1 to 4
8-axis module:
Any of axes 1 to 8
16-axis module:
Any of axes 1 to 16
Axis definition
Reference axis
4-axis module:
Any of axes 1 to 4
8-axis module:
Any of axes 1 to 8
16-axis module:
Any of axes 1 to 16
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Interpolation axis
"Axis to be interpolated No.1" set in reference axis
"Axis to be interpolated No.1" and "Axis to be
interpolated No.2" set in reference axis
"Axis to be interpolated No.1", "Axis to be
interpolated No.2" and "Axis to be interpolated No.3"
set in reference axis
Circular interpolation axis
"Axis to be interpolated No.1" set in
reference axis
3 MAJOR POSITIONING CONTROL
3.1 Outline of Major Positioning Controls
Linear interpolation axis
"Axis to be interpolated No.2" set in
reference axis
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