What is SMT machine

SMT machines are also known as SMT Machines used to automate the assembly process of the printed circuit board (PCB). The task is to pick the electronic components and place them on the empty circuited PCB board.

During the assembly process of the PCB board, the most important key factor is to get the components placed at the right place with an accuracy of 0.05mm. These factors can only be achieved by using a high-tech SMT machine.

Working Process of SMT machine

At first, the PCB board gets loaded from the PCB loader and the Solder Paste Printer applies the solder paste to the surface of the PCB board. Now the PCB board is ready for the pick and place process.

After solder paste is applied the conveyor passes the PCB board into the SMT machine for the placement of components on the PCB board. The machine has a fixed width and length adjustment according to the size of the PCB board. The PCB board gets locked by the SMT machine.

Adjustment of Mark Points

Every SMT machine needs to scan the mark points first. Normally there are two mark points on a PCB board.

Accurate scanning of mark points confirms the position of the PCB board. The head moves to mark1 and the camera scans the mark point and saves it by taking the picture of mark1 likewise the head moves to mark2 and the camera scans the second mark2 saves the picture in the database.

Now the SMT machine or SMT machine has successfully obtained the exact position of the PCB board. It’s the time of scanning the mounting pointing.

Scanning of Points for Mounting Process

The linear camera scans each mounting point of the PCB board by taking the pictures and saves them into the database when scanning of the component is done the machine is ready for the picking of the components.

Picking of components

Each component is picked simultaneously from the electronic feeder. To pick up the right component the head comes to the feeder and picks up the electronic component with the help of the installed nozzle in front of the spindle.

There are multiple spindles in a machine’s head ranging from 4 to 10. Spindles are installed with different nozzles according to the component size.

Placement of Components

When the picking of the components is done there is a turn to place the components on the surface of the PCB board. Firstly each component is scanned by the flying camera and the nozzle adjusts the right dimension of the component after that the component will be placed on the surface of the PCB board.

After the placement of the suitable components, the PCB board is ready for the soldering process. The conveyor unlocks the PCB board and passes it to the soldering section.