64
3 MAJOR POSITIONING CONTROL
3.1 Outline of Major Positioning Controls
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 Simple 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 (The setting value is invalid. Use the initial value or a value within the setting range.)
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"
RD77MS2
RD77MS4/RD77MS8/RD77MS16
Reference axis
Interpolation axis
Reference axis
Interpolation axis
2-axis linear interpolation control
2-axis fixed-feed control
2-axis circular interpolation control
2-axis speed control
Any of axes 1 to 2
"Axis to be interpolated No.1"
set in reference axis
RD77MS4:
Any of axes 1 to 4
RD77MS8:
Any of axes 1 to 8
RD77MS16:
Any of axes 1 to 16
"Axis to be interpolated No.1" set in
reference axis
3-axis linear interpolation control
3-axis fixed-feed control
3-axis speed control
"Axis to be interpolated No.1" and "Axis
to be interpolated No.2" set in reference
axis
4-axis linear interpolation control
4-axis fixed-feed control
4-axis speed control
"Axis to be interpolated No.1", "Axis to
be interpolated No.2" and "Axis to be
interpolated No.3" set in reference axis
Interpolation control set in
"[Da.2] Control method"
RD77MS2
RD77MS4/RD77MS8/RD77MS16
Reference
axis
Circular
interpolation
axis
Linear
interpolation
axis
Reference axis
Circular
interpolation
axis
Linear
interpolation
axis
3-axis helical interpolation control
RD77MS4:
Any of axes 1 to 4
RD77MS8:
Any of axes 1 to 8
RD77MS16:
Any of axes 1 to 16
"Axis to be
interpolated No.1"
set in reference
axis
"Axis to be
interpolated No.2"
set in reference
axis
Summary of Contents for RD77MS16
Page 1: ...MELSEC iQ R Simple Motion Module User s Manual Application RD77MS2 RD77MS4 RD77MS8 RD77MS16 ...
Page 2: ......
Page 316: ...314 9 COMMON FUNCTIONS 9 4 External Input Signal Select Function Program example ...
Page 317: ...9 COMMON FUNCTIONS 9 4 External Input Signal Select Function 315 9 ...
Page 575: ...13 PROGRAMMING 13 4 Positioning Program Examples 573 13 Error reset program Axis stop program ...
Page 643: ......