MITSUBISHI ELECTRIC Mitsubishi Programmable Logic Controller QD75D - Manual (Page 356)

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MELSEC-Q
9 MAJOR POSITIONING CONTROL
[2] 2-axis circular interpolation control with sub point designation (INC
circular sub)
Operation chart
In the incremental system, 2-axis circular interpolation control with sub point
designation, positioning is carried out from the current stop position (start point
address) to a position at the end of the movement amount set in " Da.6
Positioning address/movement amount" in an arc path that passes through the sub
point address set in " Da.7 Arc address". The movement direction depends on
the sign (+ or -) of the movement amount.
The resulting control path is an arc having as its center the intersection point of
perpendicular bisectors of the straight line between the start point address (current
stop position) and sub point address (arc address) calculated from the movement
amount to the sub point, and a straight line between the sub point address (arc
address) and end point address (positioning address) calculated from the
movement amount to the end point.
Reverse direction
Reverse direction
Forward direction
Movement by circular interpolation
Forward direction
Movement amount to the end point
Movement
amount to the
sub point
Movement amount
to sub point
Movement amount
to the end point
Arc center
Sub point address
(arc address)
Start point
address