Specifications

inspection. These systems work independently
within the machine providing a combined solution.
In this application, the motion “trajectories” are sent
from the host to the drives. The drives interpret the
trajectories and drive the servo motors accordingly.
The drives also run supervisory monitoring programs
and can execute a programmed script that is stored
in flash memory.
Previously, a centralized controller with a PC front-
end was used to interface with I/O pneumatics
and the motion system. This put the burden of the
machine control on a single processing system in
which all devices received commands and reported
back data (feedback position, sensor state, etc.).
Advantech’s PCI-1240U was applied for the high-
speed motion control, giving the added performance
from motors. For the I/O card architecture,
Advantech’s PCI-1751U DI/O card is applied, helping
the moving motor control different lighting for visual
judgment, which helps make the inspection clear
and reliable.
Having two subsystems running independently
(automatic soldering application and automatic
visual inspection) with the ability to interact with
each other for coordinated motion, allowed the
overall machine to provide 20% more throughput.
This, coupled with a quicker changeover process,
provided greater machine utilization when smaller
production runs dictated machine usage.
Conclusion
By combining Advantech’s PCI-1240U and PCI-1751U cards, a high-performance, highly reliable, and
cost-effective solution was found. The customer now had 1 machine that controlled machine vision and
motion control, with 3D solder inspection capabilities. Furthermore, the system provided the following
benefits:
•
3D solder paste printing inspection machine
•
Ultra simple and highly precise in-line PCB inspection system
•
Ultra high-speed inspection
•
Real-time judgments of failed patterns
•
High-speed and easy Human Machine Interface
•
SPC (Statistical Process Control) System providing Online fault Pareto listing
The main purpose of an SPC (Statistical Process Control) System is to collect quality-related data during
production process for further statistical analysis, and to discover any abnormality in the production
process.
PCI-1240U
4-axis Universal PCI Stepping/
Pulse-type Servo Motor Control
Card
PCI-1751U
48-bit Universal Digital I/O and
Counter Card
Switch, Button and
Indicator
Digital Input/Output
Optical Inspection
Mechanism
Motion Control
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