4-26 Mx-Series Operation Manual
− Component Centering
Each position value (XY coordinate) entered when creating a job program to place
components on PWB corresponds to the distance from the origin of PWB to the center of the
nozzle positioned for component placement.
Therefore, where the center of the nozzle is aligned with the center of the component, the
component position defined in the job program does not have to be compensated.
If the center of the nozzle does not coincide with that of the component, the distance and
angle for the nozzle to move so as to place the component at the exact position should be
compensated with the offset between the center of the nozzle and the center of the
component.
The upward camera recognizes offset in distance and angle between the center of the
nozzle and the center of the component and sends the result data to the host computer to
carry out compensation.
− Defective component inspection
The upward camera inspects component defects such as damaged leads to determine
placement of the component picked up by the nozzle.
Normal placement would be impossible where no component is picked up due to picking
error or where the component is not exactly picked up due to picking position error or
feeding error.
In such cases, the component is discarded in the trash box and component placement is
attempted again in the next step.
Vision System – Downward (head) Camera
The downward camera of Mx-Series vision system is used for position
teaching and mark inspection.
• Structure
<Figure 4-14> shows the structure of the downward camera used for the
vision system. The camera consists of Optics (or CCD camera), LED
Illuminator and Vision Processing
Engine.
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