Mitsubishi Electronics QD75MH2 Benutzerhandbuch

 
 

 

9 - 54 

MELSEC-Q

 

9   MAJOR POSITIONING CONTROL 

 

9.2.10 2-axis circular interpolation control with sub point designation 

In "2-axis circular interpolation control" ("

Da.2

Control system" = ABS circular sub, 

INC circular sub), two motors are used to carry out position control in an arc path 
passing through designated sub points, 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.)  

 

[1]    2-axis circular interpolation control with sub point designation (ABS 

circular sub) 

 

 Operation chart 

 

In the absolute system, 2-axis circular interpolation control with sub point 
designation, addresses established by a machine OPR on a 2-axis coordinate 
plane are used. Positioning is carried out from the current stop position (start point 
address) to the address (end point address) 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 resulting control path is an arc having as its center the intersection point of 
perpendicular bisectors of a straight line between the start point address (current 
stop position) and sub point address (arc address), and a straight line between the 
sub point address (arc address) and end point address (positioning address).  

 

OP

Reverse direction

Forward direction

Arc center point

Movement by circular interpolation

Forward direction

End point address

(arc address)

(positioning address)

Start point address

(current stop position)

Reverse direction

Sub point address