3 MAJOR POSITIONING CONTROL
3.2 Setting the Positioning Data
95
3
3-axis helical interpolation control with sub point designation
In "3-axis helical interpolation control" ("[Da.2] Control method" = ABS helical sub, INC helical sub), three motors are used to
carry out the circular interpolation control of 2 axes. The remaining axis is used for "helical control" or "tangent control and
normal line control".
X axis: Reference axis, Y axis: Circular interpolation axis, Z axis: Linear interpolation axis
Speed of the helical interpolation control
The circular interpolation control (Reference axis
Composite speed of the circular interpolation axis) is the target of the
command speed of the 3-axis helical interpolation control.
Control
details
Control overview
Positioning path
Helical control
Draws a helical path by following the linear interpolation
axis (linear control) to the circular interpolation control.
■
Unit setting
• Reference axis: mm/inch, pulse
• Circular interpolation axis: The same as the reference
axis
• Linear interpolation axis: mm/inch, pulse
Tangent
control/
Normal line
control
Keeps the direction of the workpiece against the center
point of the circular interpolation control by following the
value of the linear interpolation axis (degree) to the
circular interpolation control. The figure shown on the left
is an example in which the direction of the workpiece is
kept to the direction of the tangent or normal line.
■
Unit setting
• Reference axis: mm/inch, pulse
• Circular interpolation axis: The same as the reference
axis
• Linear interpolation axis: degree
Z axis
Z axis
Y axis
X axis
(mm/inch/pulse)
Start point
End point
Y axis
End point
Start point
X axis
Z axis
(degree)
Z axis
Y axis
X axis
End point
A linear interpolation axis tracks
the movement of circular
interpolation control.
The command speed of this control
is same as the speed of circular
interpolation control.
Start point
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: ......