3 MAJOR POSITIONING CONTROL
3.1 Overview of the Major Positioning Controls
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3
Interpolation control
Meaning of the interpolation control
For 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 motors set in the directions of two to four axes. This type of control is called interpolation control.
In the interpolation control, the axis in which the control method is set is defined as the reference axis and the other axes are
defined as the interpolation axes. The RD75 controls the reference axis following the positioning data set in the reference
axis, and controls of the interpolation axes corresponding to the control of the reference axis so that a linear or arc path is
drawn.
The following table shows the combinations of the reference axis and interpolation axes.
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. However, the circular interpolation axis can be
specified in [Da.5] Axis to be interpolated of the reference axis. The following table shows the combinations of the reference
axis, circular interpolation axis, and linear interpolation axis for the 3-axis helical interpolation control.
*1 Specified in [Da.5] Axis to be interpolated of the reference axis.
*2 An axis that is not specified in [Da.5] Axis to be interpolated of the reference axis is automatically assigned.
Interpolation control set in [Da.2] Control
method
Reference axis
Interpolation axis
2-axis linear interpolation control, 2-axis fixed-feed
control, 2-axis circular interpolation control, and 2-axis
speed control
Any of Axis 1 to 4
Depends on the axis to be interpolated set in the
reference axis
3-axis linear interpolation control, 3-axis fixed-feed
control, and 3-axis speed control
Axis 1
Axis 2, Axis 3
Axis 2
Axis 3, Axis 4
Axis 3
Axis 4, Axis 1
Axis 4
Axis 1, Axis 2
4-axis linear interpolation control, 4-axis fixed-feed
control, and 4-axis speed control
Axis 1
Axis 2, Axis 3, Axis 4
Axis 2
Axis 3, Axis 4, Axis 1
Axis 3
Axis 4, Axis 1, Axis 2
Axis 4
Axis 1, Axis 2, Axis 3
Interpolation control set in [Da.2]
Control method
Reference axis
Circular interpolation axis
Linear interpolation axis
3-axis helical interpolation control
Axis 1
Axis 2
Axis 3
Axis 3
Axis 2
Axis 2
Axis 3
Axis 4
Axis 4
Axis 3
Axis 3
Axis 4
Axis 1
Axis 1
Axis 4
Axis 4
Axis 1
Axis 2
Axis 2
Axis 1
Summary of Contents for MELSEC iQ-R RD75P4
Page 1: ...MELSEC iQ R Positioning Module User s Manual Application RD75P2 RD75P4 RD75D2 RD75D4 ...
Page 2: ......
Page 13: ...11 MEMO ...
Page 19: ...17 CONTENTS INDEX 588 REVISIONS 592 WARRANTY 593 TRADEMARKS 594 ...
Page 498: ...496 13 PROGRAMMING 13 2 List of Labels Used ...
Page 503: ...13 PROGRAMMING 13 4 Program Example 501 13 ...
Page 514: ...512 13 PROGRAMMING 13 4 Program Example Restart program Parameter data initialization program ...
Page 515: ...13 PROGRAMMING 13 4 Program Example 513 13 Flash ROM write program Error reset program ...
Page 516: ...514 13 PROGRAMMING 13 4 Program Example Stop program ...
Page 565: ...APPENDICES Appendix 4 Operation Examples of When the Remote Head Module Is Mounted 563 A ...
Page 597: ......