9 MAJOR POSITIONING CONTROL

9.2.11 2-axis circular interpolation control with center point designation

MELSEC-Q

In "2-axis circular interpolation control" ("

Da.2

Control system" = ABS circular right,

INC circular right, ABS circular left, INC circular left), two motors are used to carry out position control in an arc path having a designated center point, while carrying out interpolation for the axis directions set in each axis.

(Refer to Section 9.1.6 "Interpolation control" for details on interpolation control.)

The following table shows the rotation directions, arc center angles that can be controlled, and positioning paths for the different control systems.

Control system

Rotation direction

Arc center angle that

 

Positioning path

 

 

 

can be controlled

 

 

 

 

 

 

 

 

 

 

 

 

 

Positioning path

 

 

ABS circular right

 

 

 

 

 

 

 

 

 

 

 

 

Clockwise

 

Start point

0° <

 

 

 

<

360°

End point

 

 

 

 

 

 

 

 

 

 

(current stop

 

 

 

(positioning address)

 

 

 

 

 

 

 

 

 

 

 

 

 

position)

 

 

 

 

 

 

 

 

INC circular right

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Center point

 

 

 

 

0° < θ ≤ 360°

 

 

 

 

 

 

 

 

 

 

 

 

Center point

 

 

 

 

 

 

 

 

ABS circular left

 

 

 

 

 

 

 

 

 

 

 

 

Counterclockwise

 

Start point

0°<

 

 

< 360°

End point

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INC circular left

 

 

(current stop

 

 

 

 

 

 

(positioning address)

 

 

position)

 

 

 

 

 

 

 

 

 

 

 

 

Positioning path

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Mitsubishi Electronics QD75D, QD75P user manual Can be controlled, Clockwise, Counterclockwise