358
5 POSITIONING CONTROL
5.17 Continuous Trajectory Control
■
Program 2
The program that controls the nozzle direction so that the nozzle stays perpendicular to the circular arc curve by 3 axes
continuous trajectory control of Axis 1, Axis 2, and Axis 3 is explained as an example.
• 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.
• Positioning conditions
• Helical interpolation conditions for continuous trajectory control are shown below.
Item
Setting
Servo program No.
61, 62
Positioning speed
1000.00 [mm/min]
Control axis
Positioning address
Central point
Axis 1 [
m]
Axis 2 [
m]
Axis 3 [degree]
Axis 1 [
m]
Axis 2 [
m]
Pass point
Start point
0.0
150000.0
0.00000
P1
50000.0
150000.0
0.00000
P2
150000.0
50000.0
90.00000
50000.0
50000.0
P3
150000.0
-50000.0
90.00000
P4
50000.0
-150000.0
180.00000
50000.0
-50000.0
P5
-50000.0
-150000.0
180.00000
P6
-150000.0
-50000.0
270.00000
-50000.0
-50000.0
P7
-150000.0
50000.0
270.00000
P8
-50000.0
150000.0
0.00000
-50000.0
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.
• Continuous trajectory control start command: X0 Leading edge (OFF
ON)
-150000.0
-100000.0
50000.0
100000.0
0.0
150000.0
Y (Axis 2)
X (Axis 1)
X,Y-axis plane
R=100
R=50
150000.0
50000.0
100000.0
-150000.0
-100000.0
Nozzle
[Unit:
μ
m]
90
°
270
°
180
°
0
°
Z-axis (Rotation angle)
Start point
Содержание MELSEC iQ-R16MTCPU
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