With the support of Zhongweixing’s bus solution, glass polishing becomes more efficient and delivers a higher-quality texture.
2020-05-29
[STEP Group | Zhong Weixing] 2.5D glass is widely used in products such as mobile phone cover panels, in-vehicle displays, and smartwatch screens. In its processing, CNC polishing machines are typically employed to polish the straight surfaces around the edges, thereby enhancing transparency and texture.
Zhongweixing closely monitors the technical challenges across the entire mobile phone industry chain. Its bus-control solution for mobile glass polishing machines, specifically designed for the polishing equipment industry, has won widespread acclaim from numerous customers thanks to its cost-effectiveness and high efficiency.
For multi-axis applications in scanning machines, the use of Zhongweixing’s AMC1600E bus-based motion control system paired with the QXE bus servo system not only enhances the overall machine’s positioning accuracy and stability but also fully leverages its advantages in efficiency and flexibility.
The seven-axis 2.5D polishing machine on the market features an overall structure divided into two main parts: one part uses a clamping cylinder to secure the workpiece, with a servo motor driving the workpiece to rotate; the other part consists of two polishing brush wheels—one on the left and one on the right—driven by servo motors. These brush wheels follow the contour of the workpiece’s edges according to a programmed path, while also being capable of performing vertical, horizontal, and rotational movements.
The polishing trajectory is generated by the envelope formed through the motion of the brush and the workpiece’s rotating axis, and the contour curve is adjusted via torque-based compensation.
Electrical wiring diagram
The solution employs the EtherCAT system bus-type motion controller AMC1600E and QXE bus servo drives.
Program Features
1. Segment speed is adjustable.
The workpiece is divided into several segments, each with adjustable speed. By controlling the spindle speed, the linear velocity at the contact point between the workpiece and the brush can be precisely regulated, thereby achieving constant-linear-velocity polishing. This significantly improves polishing quality and greatly reduces the difficulty of polishing glass corners and curved surfaces.
2. Real-time torque compensation
By leveraging the electronic cam function of the AMC1600E, the brush and the rotating shaft of the intermediate workpiece generate a grinding trajectory through enveloping. Real-time torque compensation is applied to adjust the electronic cam profile curve, thereby ensuring uniform material removal and high profile consistency.
3. Supports importing DXF files for mapping.
In glass beveling applications, there are often very high requirements for the contours of the machined surfaces. Consequently, many machining path curves are typically designed using CAD software, with DXF files serving as the standard format. This application provides full support for importing DXF files.
Implementation effect
The overall equipment accuracy can reach ±0.01 mm. This control system employs an electronic cam-plus-torque compensation approach using the AMC1600E, requiring only one controller to manage the entire process. As a result, it not only meets the stringent requirements for high-precision machining but also keeps hardware costs under control. Compared with traditional CNC control or PLC-plus-vision control solutions, this system offers clear advantages.
Zhongweixing’s polishing machine control solution is highly mature and has already been widely adopted in the polishing industry.
Contact Us
Email:
market@stepelectric.com
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No. 1560, Siyi Road, Jiading District, Shanghai Municipality