Mitsubishi QD75P1N - 3-Axis Linear Interpolation Control

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MELSEC-Q
9 MAJOR POSITIONING CONTROL
9.2.4 3-axis linear interpolation control
In "3-axis linear interpolation control" ("
Da.2
Control system" = ABS linear 3, INC
linear 3), three motors are used to carry out position control in a linear path 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] 3-axis linear interpolation control (ABS linear 3)
Operation chart
In absolute system 3-axis linear interpolation control, 3 axes are used. Linear
interpolation 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".
End point address (X
2
,Y
2,
Z
2
)
(Positioning address)
Movement by linear interpolation
of the X axis, Y axis and Z axis
Y axis movement amount
Start point address (X
1,Y1,Z1)
(Current stop position)
Forward direction (X axis)
Forward direction (Z axis)
Reverse direction
Forward direction
(Y axis)
X axis movement amount
Z
a
x
i
s
m
o
v
e
m
e
n
t
a
m
o
u
n
t
Reverse direction Reverse direction
End point address
(positioning address)
Axis 2 movement amount (8000-2000=6000)
Start point address
(current stop position)
Axis 1
Axis 3
Axis 2
8000
Axis 3 movement amount
(4000-1000=3000)
4000
2000
1000
1000
0
4000
Axis 1 movement amount
(4000-1000=3000)
Example
When the start point address (current stop positon) is (1000, 2000, 1000) and the end point address
(positioning address) is (4000, 8000, 4000), positioning is carried out as follows.