Jul 07, 2020
In CNC machine tools, the electric spindle usually adopts frequency conversion speed regulation method. There are three control methods: common frequency conversion drive and control, vector control drive and direct torque control.
Ordinary frequency conversion is scalar drive and control, and its drive control characteristic is constant torque drive, and the output power is proportional to the speed. The dynamic performance of ordinary frequency conversion control is not ideal, the control performance is not good at low speed, the output power is not stable enough, and it does not have the C-axis function. But the price is cheap and the structure is simple. It is generally used for grinding machines and ordinary high-speed milling machines.
The vector control technology imitates the control of the DC motor, is oriented by the rotor magnetic field, and uses the vector transformation method to achieve driving and control, and has good dynamic performance. The vector control drive has a large torque value at the start, and the electric spindle itself has a simple structure and a small inertia, so the startup acceleration is large, and the allowable limit speed can be reached instantly after startup. This kind of drive has two kinds of open-loop and closed-loop. The latter can realize the feedback of position and speed, which not only has better dynamic performance, but also can realize the C-axis function; while the former has a slightly worse dynamic performance and does not have the 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 concise and clear system structure are more suitable for the drive of high-speed electric spindle, and it can also meet the requirements of high-speed electric spindle. The requirements of high speed, wide speed range, dynamic characteristics and static characteristics of high-speed instantaneous stop have become a hot technology in the field of AC drive.
Scope of application:
Granite, marble, bluestone, sandstone and other stone carvings
Granite and other hard stones can be carved into layers to 5mm
Marble, bluestone, etc. can be carved up to 5mm at a time
There are two types of computer engraving machines: laser engraving and mechanical engraving, both of which have high power and low power. Because the application range of engraving machines is very wide, it is necessary to understand the most suitable application range of various engraving machines: 1. Badge: low-power laser engraving machine (engraving machine), high-power or low-power computer engraving machine; 2, Architectural model: high and low power computer engraving machine; 3. Metal (die, stamp, etc.) processing: high and low power computer engraving machine (high power saves time because of the large amount of cutting each time); 4. Crystal character production: High-power laser engraving machine (above 50W), high-power mechanical engraving machine; 5, wood, plexiglass, artificial stone and other signs: high-power mechanical engraving machine; 6, display, exhibition model production: high-power, large-format mechanical engraving Machine; 7, ceramics, mold blanks, jade, handicrafts, ornaments, pendants, electronic fixtures, hand engraving: high-power computer engraving machine.
Woodworking engraving machine
Tombstone carving machine
Laser engraving machine
Advertising engraving machine
Jade carving machine
Stone carving machine
Cylindrical engraving machine
Mould engraving machine
Miniature engraving machine
PCB circuit board engraving machine
Metal engraving machine
Glass engraving machine
Mould engraving machine
Advertising industry, craft industry, mold industry, electronics industry, construction industry, printing and packaging industry, wood industry, decoration industry, tombstone industry, crystal product industry, etc.
Acrylic organic board, PVC board, hibiscus board, double color board, wood board, density board, marble, fireproof board, rubber board, glass, crystal, etc.
Advertising companies, decoration companies, hotels, hotels, shopping malls, schools, hospitals, office buildings, entertainment venues, bath centers, groups, enterprises, administrative agencies, etc.