Mitsubishi Electric MELSEC Q Series Programming Manual page 340

6 POSITIONING CONTROL
Servo program No.
Positioning speed
Control axis
Pass
point
(2) Positioning operation details
The operation to start as the following figure from start point and witch keeps a
nozzle at right angles toward the contour of line and that it goes around the
contour and witch is returned to start point. It is the following program when a
helical interpolation function is used.
Y (Axis 2)
150000.0
100000.0
50000.0
0.0
-150000.0
-100000.0
-100000.0
-150000.0
X,Y-axis plane
(3) Positioning conditions
(a) Helical interpolation conditions for constant-speed control are shown below.
Item
Axis 1 [µm]
Start point 0.0
P1 50000.0
P2 150000.0
P3 150000.0
P4 50000.0
P5 -50000.0
P6 -150000.0
P7 -150000.0
P8 -50000.0
Vibration may cause the machine at the pass point depend on the speed
change. In this case, reduce the speed change (acceleration) in the FIN
acceleration/deceleration.
However, a locus will change depend on the setting time of the FIN
acceleration/deceleration.
(b) Constant-speed control start command ....... PX000 Leading edge
Start point
Nozzle
R=50
R=100
X (Axis 1)
50000.0 150000.0
100000.0
[Unit:
Setting
61, 62
1000.00 [mm/min]
Positioning address
Axis 2 [µm] Axis 3 [degree]
150000.0 0.00000
150000.0 0.00000
50000.0 90.00000
-50000.0 90.00000
-150000.0 180.00000
-150000.0 180.00000
-50000.0 270.00000
50000.0 270.00000
150000.0 0.00000
6 - 153
180
90
0
m]
Z-axis (Rotation angle)
Central point
Axis 1 [µm]
—
—
50000.0
—
50000.0
—
-50000.0
—
-50000.0
(OFF ON)
270
Axis 2 [µm]
—
—
50000.0
—
-50000.0
—
-50000.0
—
50000.0