-d:.> -- -- -->The bed body is made of high-strength steel and has undergone tempering and aging treatment. The structural design is advanced, runs smoothly and is durable
- --- -->.
-- -- -->In terms of processing principle, engraving is a combination of drilling and milling. The engraving machine can handle multiple data input modes according to needs. There are two types of computer engraving machines: laser engraving and mechanical engraving. Both types are divided into high power and low power. Because the application range of engraving machines is very wide, it is necessary to understand the most suitable application ranges of various engraving machines. Low-power ones are only suitable for two-color boards, architectural models, small signs, three-dimensional handicrafts, etc. Because the power is too small, its application range is greatly affected. A high-power engraving machine can do the same thing as a low-power engraving machine. Most suitable for large-scale cutting, relief and engraving.
-- -- -->In CNC machine tools, electric spindles usually use variable frequency speed regulation. There are three main control methods: ordinary variable frequency drive and control, vector control drive drive and control, and direct torque control.
-- -- -->Ordinary frequency conversion is a scalar drive and control, and its drive control characteristics are constant torque drive. The output power is proportional to the speed. The dynamic performance of ordinary frequency conversion control is not ideal, the control performance is poor at low speeds, the output power is not stable enough, and it does not have the
--- ---> axis function. However, it is cheap and has a simple structure and is generally used in grinders and ordinary high-speed milling machines.
-- -- -->Vector control technology imitates the control of DC motors and uses vector transformation methods to achieve drive and control with rotor magnetic field orientation and has good dynamic performance. The vector control driver has a large torque value when it first starts. In addition, the electric spindle itself has a simple structure and small inertia. Therefore, the startup acceleration is large and the allowable limit speed can be reached instantly after startup. This kind of driver has two kinds: open loop and closed loop. The latter can realize the feedback of position and speed. It not only has better dynamic performance but also can realize the
--- ---> axis function. The former has slightly worse dynamic performance. It does not have the
--- ---> axis function but is cheaper.
.-. -- --- - --d --->Direct torque control is another new type of high-performance AC speed control technology developed after vector control technology. Its control idea is novel and the system structure is Simple and clear, it is more suitable for driving high-speed electric spindles and can better meet the requirements of dynamic and static characteristics of high-speed electric spindles such as high speed, wide speed range, and high-speed instantaneous stop. It has become a hot technology in the field of AC transmission
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