Mechanical Principles Mechanical Parameters Mechanical Purchase Mechanical Maintenance Tool Installation Type Engraving Machine In CNC machine tools, the electric spindle usually adopts the frequency conversion speed regulation method. There are three control methods: ordinary variable frequency drive and control, vector control drive and direct torque control. Ordinary frequency conversion is scalar drive and control. Its drive control characteristic is constant torque drive. The output power is proportional to the speed. The dynamic performance of ordinary variable frequency control is not ideal, the control performance is not good at low speeds, the output power is not stable enough, and it does not have the C-axis function. However, it is cheap and simple in structure, and is generally used for grinding machines and ordinary high-speed milling machines. The vector control technology mimics the control of a DC motor, uses the rotor field orientation, and uses vector transformation to achieve driving and control. It has good dynamic performance. The vector control driver has a large torque value at the start of the process. In addition, the electric spindle itself has a simple structure and small inertia, so the starting acceleration is large, and it can achieve the allowable limit speed instantly after starting. This kind of driver has two kinds of open loop and closed loop, the latter can realize the position and speed feedback, not only has better dynamic performance, but also can realize the C axis function; while the former has slightly worse dynamic performance, it does not have C axis function , But the price is cheaper. Direct torque control is another new type of high-performance AC speed regulation technology developed after vector control technology. Its novel control idea and simple and clear system structure make it more suitable for high-speed electric spindle drive and more suitable for high-speed electric spindle. The requirements of high speed, wide speed regulation range, high-speed instantaneous exact stop dynamic and static characteristics have become a hot technology in the field of AC transmission. Scope of application: Granite, marble, bluestone, sandstone and other stone carvings. Hard stone such as granite can be carved to 5mm in layers. Marble and bluestone can be carved to 5mm at one time.