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MELSEC-A
9 MAIN POSITIONING CONTROL
POINT
Set a value in " Da.7 Command speed" so that the speed of each axis does not
exceed the " Pr.7 Speed limit value". (The speed limit does not function for the
speed calculated by the AD75 during interpolation control.)
(2) 2-axis circular interpolation control with center point designation
(INC right arc, INC left arc)
Operation chart
In the increment system, 2-axis circular interpolation control with center point
designation, addresses established by a machine zero point return on a 2-axis
coordinate plane are used. 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.5 Positioning address/movement amount", in an arc path having as its
center the address (arc address) of the center point set in " Da.6 Arc address".
Start point address
(current stop position)
Radius
Movement by circular interpolation
Forward direction
Reverse direction
Arc center point
Forward direction
Reverse direction
Movement amount
to the end point
(Arc address)
Movement amount to the end point
Positioning of a complete round with a radius of the distance from the start point
address to the arc center point can be carried out by setting the movement amount
to "0".
Movement amount 0
=
Arc center point
Reverese direction
Forward direction
(Arc address)
Reverese direction
Forward direction
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