This brightness separation is how the camera defines
the part body and lead boundaries. This is an image captured
on a camera system that is focused properly, has the aperture
set correctly, the gain level set correctly, with the
proper AMID brightness. There is a separation value of
more than 100 between the edge of the lead and part body,
and the surrounding pixels.
Machine Nozzle
Center and Brightness Results and their meanings:
When you run a nozzle center and brightness test on your
CP series machines, the machine measures the following
parameters and displays the results. Understanding what
the results mean can help you run more efficiently.
1. Nozzle Center- The machine measures each
nozzle at 0 and 180 degrees. It finds the rotational center
of each nozzle and compares the nozzle diameter, and the
bend limit of the nozzle, to what is listed in the nozzle
data file. If the machine determines that the nozzle is
outside of the bend limit, or it cannot find the nozzle
diameter, it will fail the nozzle.
2. Nozzle
Backlight Tolerance- The machine measures the brightness
of the nozzle back disks and compares the results to the
tolerance set in the machine. There are many factors that
can affect this result. The scale is from 0 to 256, and
a properly set-up machine, with new back disks, should
measure approximately 245-254. The default tolerance level
in your machine’s proper data is 170 for the wide-view
camera and 150 for the narrow-view camera. This value
is over half of the gray-scale. This value will let almost
any nozzle back disk pass the test, and will cause placement
issues and vision errors.
3. Nozzle Backlight Deviation- The machine measures
the brightness of the nozzle back disks and compares the
deviation to the tolerance set in the machine. The deviation
is the standard deviation of the brightness level measured
across the surface of the back disk, and checks for irregularities
in the brightness level. There are many factors that can
affect the results of this measurement, such as irregular
brightness in the material of the back disks, or dirt
on the surface of the back disk. The standard deviation
is 10.
Understanding the Results of the Center
and Brightness Test:
1. If the machine gives a red
(X) , it means that the nozzle is the wrong
diameter, is outside of the bend limit or cannot be measured
because the brightness level is so poor, that the camera
cannot find the nozzle tube image.
2. If the machine gives a purple
(0), it means that the nozzle is failing for
deviation, and needs to be
cleaned or has irregular brightness in the material. The
machine will still use this nozzle to place
components, however, depending on where the irregularity
or dirt is, it can affect the camera’s ability to
process the image.
3. If the machine gives a yellow
(0), it means that the nozzle is failing for
brightness, and the backdisk should be replaced.
4. If the machine gives a green
(0), it means that the nozzle is within the
specified center, bend limit,
brightness, and deviation tolerance level. |
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