Informa

"Oscar" Series Events of Global Sign Industry

SIGN CHINA 2020 • Shanghai

2020.9.17-19 | Shanghai New International Expo Centre

Concurrent Events
  • Opens in Days
  • ShanghaiShenzhen
  • |

Sign Making Equipment: Introduction of Engraving Machine

23.12.2019 22:54

Engraving is a combination of drilling and milling from the principle of processing. The multiple data input modes of the engraving machine are more flexible. There are two types of computer engraving machines: laser engraving and mechanical engraving. Both types 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. Low-power ones are only suitable for two-color panels, building models, small signs, three-dimensional crafts, etc. Because the power is too small, it greatly affects the scope of its application. High power engraving machine can do things with low power engraving machine. Most suitable for large-scale cutting, embossing and carving.

 

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 drive has a large torque value at the start, and the electric spindle itself has a simple structure and small inertia. Therefore, the starting acceleration is large, and the allowable limit speed can be reached 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.

 

 

Taxonomy

 

1. Stepper driver + stepper motor

The stepping system is the most commonly used drive system on the market. The most popular is the three-phase hybrid stepping motor, which accounts for more than 90% of the market share. The reason is that it is cheap and is equipped with a Leica high segment driver After the effect is good. However, the defects are also obvious, such as: resonance, noise, speed increase, torque reduction, long-term work is easy to lose steps, motor temperature rise is too high, etc.

 

2. Hybrid servo driver + motor

The use of hybrid servos in China has not been widespread. There are many reasons for this. There are not many foreign manufacturers doing hybrid servos, and the price is not very great compared to AC servos. They can only be used in some special industries. Improvements include: improving high-speed performance, reducing heat generation, and reducing resonance.

 

3.AC servo driver + AC servo motor

The use of AC servo in the engraving machine is still relatively small, mainly due to the relatively high price. In addition, the application of AC servo has certain requirements on the structure, electrical appliances, control system and transmission system of the machine tool. The board determines the amount of water in the barrel, because some AC servos are generally used in high-end models. The AC servo has: fast response, large torque, high speed, high accuracy, low heat generation, continuous work for a long time, and a complete alarm system. Disadvantages: Different equipment needs different servo parameters, and the adjustment of parameters requires high-level technical engineers.

 

 

Application classification

 

There are two types of computer engraving machines: laser engraving and mechanical engraving. Both types 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: small power laser engraving machine (engraving machine), high power or low power computer engraving machine;

 

2. Architectural model: large and small power computer engraving machine;

 

3. Metal (mold, chapter, etc.) processing: high and low power computer engraving machine (high power saves time due to more 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 production: high-power mechanical engraving machine;

 

6. Exhibition, exhibition model production: high power, large format mechanical engraving machine.

 

 

PCB circuit board engraving machine

 

main application

Advertising industry, craft industry, mold industry, electronics industry, construction industry, printing and packaging industry, wood industry, decoration industry, etc.

 

Carving supplies

Acrylic organic board, PVC board, hibiscus board, two-color board, wood board, density board, marble, fire board, rubber board, glass, etc.

 

Business object

Advertising companies, decoration companies, hotels, guesthouses, shopping malls, schools, hospitals, office buildings, entertainment venues, bath centers, groups, enterprises, administrative agencies, etc.

 

Source:58 sign