Practical Applications of Vision Positioning Systems in Precision Processing

He explains the core applications of a visual positioning system in precision machining, covering equipment selection, installation, calibration, and precision optimization.By analyzing real-life case studies, the seminar helps engineers improve production efficiency and product pass rates, and solve common problems in precision positioning.

The reason for this is that precision machining is inseparable from visual positioning.

We all know that the requirements for precision machining are getting higher and higher, and an error of one-tenth the diameter of a hair can cause a part to be scrapped.At this point, the visual positioning system is like giving the machine a pair of "X-ray eyes," allowing it to capture the position of the workpiece in real time and automatically correct any deviation.Especially when machining irregularly shaped parts or tiny components, relying on a skilled operator to manually align the cutting tool not only takes a lot of time, but precision is also difficult to maintain.

Selecting the right equipment is the key to getting the most out of your efforts.

Higher resolution is not always better.

Many people think that the higher the resolution, the better, but in fact it's a matter of what your specific needs are.For example, a 5-megapixel camera is enough for processing watch gears, but for nano-level processing of semiconductor chips, a professional industrial camera is required.When choosing a model, remember to calculate the pixel density carefully.

There are many ways to arrange lighting.

When shooting reflective metal parts, ring lights are better than normal strip lights.For transparent objects, try backlighting from below.When adjusting the lights on site, don't be afraid of being a little bit of a nuisance. Try out different combinations, and sometimes you'll find that by changing the angle of the light you can instantly improve the clarity of the image.

A guide to avoiding pitfalls in installation and tuning.

Don't underestimate the vibrations of machinery.

Last year a customer complained that his cameras were drifting off target. It turned out that the vibrations caused by people walking around in the workshop were affecting the camera mounts.After installing the anti-vibration pads, the accuracy of the machine increased by 30 % directly.When installing them, they must be kept away from heavy machinery like presses and hoists, which are "big vibration producers.

The standard has to follow the temperature.

This is especially the case in areas where there is a large difference between daytime and night-time temperatures.It is recommended that the reference calibration be made when the workshop temperature is stable, or that a constant temperature chamber be installed.If you can afford it, a camera with temperature compensation will save you a lot of trouble.

The three secrets to daily maintenance.

Every week, use a dust-free cloth to wipe the lens. Don't use alcohol, because it will corrode the coating. Every three months, check the camera's cables to make sure they are not loose. If you find the images are blurry, first check the light source. Don't rush to replace the camera.Remembering these points can help you save a lot of money on repairs.

Techniques for improving accuracy in the field.

If you run into a recurring error of 0.01 mm, you can try the "three-point method." First, take three shots of three different points to create a coordinate system. This is more resistant to interference than single-point positioning.That was how we solved the problem of machining turbine blades for cars the last time. The yield rate went from 82 % to 95 % in one go.

These experiences were all accumulated by working with the old craftsmen in the workshop. They may not be very highbrow, but they're certainly practical.If your company is facing a problem of market positioning, it might be worth checking these points.