User Manual

Vision System 9-11
Operation
The sections below are an overview of the hardware operation of the AV-2550 system.
See Figure 9-4 to locate parts.
Theory of Operation
The camera turns ON, the image is processed through the vision processor and is displayed
on the monitor. The camera generates a crosshair over the image. The crosshair is calibrated
to the XY location using a Fluidmove setup routine.
After calibration, the dispensing head, camera and light source are moved to a fiducial
location on a workpiece. The crosshairs are centered on a fiducial by using the motion
controls on the (Dispenser) Control Panel or the position controls in the Teach Window. The
programmer then can opt to use either an edge fiducial or a model fiducial. A fiducial has
parameters, such as light level, that can be adjusted using the vision system menu. This
menu also can define the vision system’s maximum fiducial search area. To help relocate a
fiducial, its image and XY location are stored in the vision system memory.
The vision system then attempts to locate the fiducial that was defined. The vision processor
recalls its location and moves the camera to an area within the defined search area. It adjusts
the light levels and parameters as defined. The vision processor looks for an image in the
defined area that matches the defined fiducial image. When it finds a fiducial, the vision
processor tests the image for a match. The results of the test are sent to Fluidmove and a
message is displayed indicating whether the fiducial was found or not. The fiducial search
instructions are automatically inserted into the dispensing program.
During production runs, Fluidmove calls the vision system when a fiducial-find instruction is
encountered in the program. The vision system searches for the fiducials as described above.
Operation Controls
When using FmNT, the parameters that control the search characteristics, camera control
and light level are located in the vision system menus. These menus are accessed through the
Fluidmove software. See Fluidmove
®
for Windows NT Installation & User Guide or On-line
Help.
? NOTE The AV-2550 Vision System cannot be run from Download Mode.
The system computer must be used to complete the search routines.