1OM-1603-006_w.pdf - 第89页
1OM-1603 1-32 3. Mechanism for Surface Mounting : Chap.1 The machine is provided with front and back lighting systems. In the front lighting system, the bottom surface of a component is illuminated directly from under th…
1OM-1603
1-31
3. Mechanism for Surface Mounting : Chap.1
1108-005
3.9 Component Recognition Section
Each beam has a component recognition camera and a light source for
illumination within its coverage area. The camera and the light source are used to
inspect (recognize) the component picked up by a vacuum nozzle.
The back and front lighting recognition systems are prepared for component
recognition. Either one of them is selected automatically according to the lighting
mode specied in the component library data.
Hood
(for BGA components)
Reference Mark Block
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Notice
(a) Do not stain the component recognition camera protective glass.
Doing so might lower the recognition accuracy.
(b) Do not put your hand on the reference mark block.
If too much force is applied to the reference mark block, it may
become deformed.
Reference
When the protective glass becomes dirty, refer to "3.2.3 Recognition Camera
Unit" in Chapter 1, Volume 4.
1OM-1603
1-32
3. Mechanism for Surface Mounting : Chap.1
The machine is provided with front and back lighting systems. In the front
lighting system, the bottom surface of a component is illuminated directly from
under the component and the reected image is captured (both ring and coaxial
lamps are used together). In the back lighting system (ring lamps), the diffusion
plate is illuminated from under the plate and the penetrated image of a component
is captured. Either one of the systems can be selected according to the components
being used.
1007-001
1OM-1603
1-33
3. Mechanism for Surface Mounting : Chap.1
1012-004
3.9.1 Front Lighting Recognition System
The gure below shows the sectional view of the recognition section in the front
recognition system and the ow of the lights for the recognition.
An appropriate lighting mode (by using the 1, 2 or 3 lamp as front lighting) is
determined for component recognition.
Vacuum nozzle
Components
Back Lighting
Front Lighting 3
(BGA Lighting)
Front Lighting 1
Front Lighting 2 (Coaxial Lighting)
CCD Camera
Scope
Diffusion Plate
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The lights emitted from the 1, 2 or 3 lamps for front lighting meet the bottom
surface of the component.
The reected lights go into the CCD camera through the monocular. That is, the
CCD camera captures the leads, etc., of the component.
Example : Captured Image for Recognition
F1A28