CP43操作手册.pdf.pdf - 第60页
Part 1 7. Nozzle Center Measurement In order to achieve high placing accuracy , the FCP IV -3 stores data on the center of rotation of nozzle holders, the amount of bend and other such data for each nozzle. These values …
Part 1
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FCP IV-3 Operation
Chapter 6 Basic Operation
Version 4.0
Part 1
7. Nozzle Center Measurement
In order to achieve high placing accuracy, the FCP IV-3 stores data on the center
of rotation of nozzle holders, the amount of bend and other such data for each
nozzle. These values are used in effect for center compensation in the
measurement operation. Nozzle center measurement is an indispensable part
of being able to carry out highly accurate image processing.
This chapter provides an explanation of this nozzle center measurement.
7.1 An Explanation of Nozzle Center Measurement
Nozzle center measurement
carries out a measurement of
the center of rotation of
nozzle holders. The amount
of bend in the nozzle is also
measured at the same time.
The distance from the center
of rotation to the nozzle tip is
calculated. The nozzle bend
is compared to the amount of
allowable bend (bend
tolerance) and a decision is
made. When the nozzle is
rotated 180° this yields the maximum amplitude of the nozzle tip and thus
the maximum amount of bend tolerance.
The nozzle center measurement is carried out twice on a single nozzle.
The first measurement looks at the current nozzle tip position. The
second measure of the nozzle tip position is carried out after the nozzle
has been rotated 180°. During this second measurement the maximum
amplitude of the nozzle tip, the center of rotation and the degree of nozzle
bend are calculated.
Further, in order to gain an image of the nozzle tip for nozzle center
measurement, image processing for a single nozzle is carried out using
both a standard (wide view) camera and a narrow view camera since the
camera resolution, field of vision and other such variables are different.
Note: The narrow field of view camera (in effect the image is magnified by this
camera) has a small area image and is not used to perform nozzle center
measurement on nozzles with a diameter 2.0 mm or greater.
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FCP IV-3 Operation
Chapter 7 Nozzle Center Measurement
Version 5.0
Part 1
Nozzle check is carried out to determine if correct nozzle size is attached
by comparing the programmed nozzle diameter with that calculated from
the nozzle image which was obtained through nozzle center
measurement. Programmed nozzle diameter will be described later in
this manual.
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FCP IV-3 Operation
Chapter 7 Nozzle Center Measurement
Version 5.0