Nozzle Model and Working Principle of SMT Mounter

Nozzle Model and Working Principle of SMT Mounter
This SMT placement machine is also calLED the SMT placement machine The mounter is a scientifIC and technological integrated equipment, transmission system, vision system, computer program and hardware composed of a rack The mounter is used to mount electronIC components onto PCB (circuit board). In electronic processing equipment, in the electronic equipment used, the densely packed electronic components on the motherboard are made by the mounter, and then reflow welded How are the electronic components installed through the mounter? The mounter has a very important component, which is called nozzle. The English name is nozzle. The tip of the mounter is like our arm, and chopsticks are like straws. Let's introduce the knowledge of the suction nozzle
Circuit board

The mounting machine provides electronic components to the mounting head through the feeder, which is covered with suction nozzles of various sizes and shapes to absorb different electronic materials The placement machine is like a person eating, then the feeder is like a bowl, the nozzle is like chopsticks or spoons, and the placement head is like a human hand The placement machine completes the placement work through these three components
The number of nozzles of mounters of different brands and models is different, but they are roughly divided into the following types
Nozzle classification: high-speed head and universal head
1. The high-speed head is mainly used to absorb relatively SMAll parts, such as 0201042
2. The universal head mainly absorbs large components or some heterogeneous components, and the installation speed of the universal head is generally slow
Nozzle shape:
Nozzle shape includes square hole, circular through hole and V-shaped groove
Customized nozzle, select a flat suction point to make a stretched nozzle according to the shape of electronic component data, stretch the groove surface of the data for suction, and make it into a back shape according to the edge of the data, with flat ends and irregular middle
Nozzle data:
1. Tungsten steel nozzle: Tungsten steel nozzle is solid and durable, but it is easy to turn white. If it turns white, draw with an oily pen, and you can continue to use it.
2. Ceramic nozzle: The ceramic nozzle is never white, but fragile and easy to break. Careful use can avoid or reduce damage.
3. Diamond steel nozzle: solid, easy to use, never whitening, but expensive, not cost-effective.
4. Plastic nozzle: When the data surface is uneven or the data is sticky, the plastic nozzle should be selected, but the service life of the plastic nozzle is not long. When ordering plastic nozzles, it is recommended to purchase more plastic nozzles as spare parts. When the tip of your mouth wears out, you can replace the glue yourself.
Working principle of tip mounter nozzle
The suction nozzle of the mounting machine adopts a visual centering system
The visual centering system adopts digital image processing technology When placing the nozzle pickup component on the head, move it to the placement position through a CAMera fixed on the placement head or fixed at a specific position on the fuselage To obtain the image, the nozzle SMT mounter detects the optical density distribution of the image elements These optical densities pass through the CCD optocoupler array composed of many small and accurate photosensitive elements on the camera in digital form, and output 0-255 gray values The gray value is proportional to the optical density The greater the gray value, the clearer the digital image Store digital information, coded, amplified, classified and analyzed. The results are echoed to the control unit, and the processing results are output to the servo system to adjust the position deviation absorbed by the compensation component. Finally, the patch operation is completed

The above is the explanation given by the editor of PCB circuit board company.
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