Application Case - Delta Electronics

Application Case
Industrial Automation BU, Delta Electronics, Inc.
Case
Issued by
Applicable to
Application of Delta’s Industrial Automation Products in Spray Machine for Printed Circuit Board
Solution Center
Date
October, 2009
Pages
2
DOP series human machine interface, DVP-EH2 series PLC, ASDA series AC servo motor and
drive
There are many patterns existing on an undivided printed circuit board (PCB), and every pattern has to be printed
with the number of that board. We can use the absolute positioning function of Delta’s DVP-EH2 series PLC to complete
positioning. The spray action does not execute when the servo stops but acts during the movement in order to increase
the productivity of the machine. Therefore, this application case explains how to determine the spray timing during the
motion and how to use X-Y positioning commands.
The Entire Delta Control System
Enter the coordinate to be sprayed into registers in the PLC by using Delta’s human machine interface, and the PLC
will later control the servo to execute positioning. During the movement of the servo, the spray action continues to save
the next coordinate data into E index register in the PLC to compare and come up with the next timing for spray.
Operation
1) Servo returns to zero point.
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2) Moving to the first spray position (X=1, Y=1) and
spraying the first pattern.
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Application Case
Industrial Automation BU, Delta Electronics, Inc.
3) Servo moves to the last line (X=7, Y=1) and sprays
each pattern during the movement.
4) Moving to the next line (X=7, Y=2) and spraying the
pattern during the movement to the first line (X=1,
Y=2).
System Efficiency
The X-Y axis positioning can be achieved by DRVA (absolute positioning) instruction in DVP-EH2 series PLC. In the
positioning process, only the next coordinate for the servo movement is required, and the timing for spraying pattern can
be calculated through the comparison instruction. Due to the fact that there are many patterns on each printed circuit
board, the handiness of entering the coordinate by the human machine interface is significant. The macro function in
Delta’s human machine interface is able to fast copy the data, and the optimized communication between Delta’s human
machine interface and PLC allows the great amount of coordinate data to display on the human machine interface,
reducing data delays taking place in the changes of values or screens.
Delta’s products utilized in this case:
Product
Model
PLC
DVP32EH00T2
Human machine
interface
DOPA75CSTD
Servo drive
ASDA*2
Parameter setting
First axis: Y0=Pulse, Y1=DIR; Second axis: Y2=Pulse, Y3=DIR
Spray trigger: Y6
1.
1-00=2: Pulse + symbol
2.
1-01=00: Pt control
3.
2-10=1: Powered to allow Servo On
4.
2-15=22: Reverse running limit protection (the signal has to
be NC.)
5.
2-16=23: Forward running limit protection (the signal has to
be NC.)
6.
2-17=21: Emergency stop protection (the signal has to be
NC.)
7.
2-32=4: Gain adjusted to auto mode.
More information on Delta’s industrial automation products, visit our website:
http://www.delta.com.tw/industrialautomation
品質至上
信賴第一
追求卓越
QUALITY
RELIABLITY
EXCELLENT