In SMD mounting machine vision system we can more accurately determine the current components, circuit boards or SMT suction nozzle position, rely on the visual recognition system we can provide more accurate placement for the placement machine then you understand how this system is composed of?
1. There is a head camera above the mounter, it generally uses the line sensor technology, in the process of picking up and moving by the mounter head can detect the components in the designated position. Can improve a lot of placement accuracy and efficiency. Generally speaking, the system is composed of two modules: one is the light source module composed by the light source and the lens. The light source lens constitutes the light transmission module.
2. There is a top view camera below the mounter, we can use it to detect the component position, when the identification system camera is installed between the pickup position and the installation position, then we can simultaneously carry out video acquisition and processing when using the video head, thus shortening the mounter installation time.
3. Laser alignment system we can use this system for the size and shape of the measured components on the mounting machine system. The advantage is that the alignment is fast and accurate, but the disadvantage is that it cannot do pin inspection on pins and components with tight pins.
Vision System of NeoDen4 desktop pick and place machine
The NeoDen 4 features a high-precision, two-camera vision system. The cameras are made by Micron Technology and are precisely aligned to the nozzles using the single unified configuration/operation application that loads on power-on.
The downward-looking camera:
On the head is used for precision location of feeders and PCB placement points. The downward looking camera also verifies proper board placement (and compensates for minor board-position inaccuracies) by auto-aligning the nozzles to multiple fiducials on the board before beginning actual pick-and-place operations. Once the coordinates are established, the semi-closed-loop stepper motors are able to repeat these locations to 20µm accuracy without further need for this camera.
The upward-looking camera:
Located on the right side of the machine. When enabled, this camera first ensures that a component is attached to the proper nozzle. If the camera detects the absence of a component, the machine will make up to two additional attempts to pick a component before asking the user for further instructions. Once a component has been verified as “picked”, the camera verifies its position relative to the nozzle. Because SMDs are small and light, and are held only loosely in their packaging, there can be a great deal of variation in the actual position of the component when it arrives in “pick” position and is lifted by the nozzle. The vision system computes the difference between the ideal and actual position (both X-Y and rotational), and then corrects for any error before precisely placing the component. Because the vision system continually corrects for even small errors in component 2 position on the nozzle, very fine-pitch components (down to 0201) can be placed with repeatable accuracy once the correct coordinates are identified. With these basic understandings, the following images reveal the basic components of the Neoden4.
Post time: Jun-10-2022