How to Choose a CNC?

In recent years, computer numerical controllers have been developed quickly and are widely used in many applications, which not only provide simpler, more intuitive interfaces, but also more convenience for users, since they are high efficiency, safety and stability. Then how to choose the suitable CNCs? In fact, if you want to choose a good CNC machine, you should pay attention to the parts as following.

1. Numerical control system

The CNC system is the brain of the machining center, and it is the command center that completes the various procedures of the machining center. High-quality numerical controller can be said to be the core component with the biggest price gap. The imported CNC systems such as Fanuc CNC system, Siemens CNC system etc. are more expensive, while domestic CNC systems are cheaper. Imported systems from Fanuc, Mitsubishi, and Siemens are more common in the market. One thing to note is that imported systems are usually bundled with three-axis servo motors, that is to say, if your system is FANUC, you must purchase FANUC servo drives and motors. Of course, it will undoubtedly increase the budget of purchase since the price is higher. In addition, the domestic CNC system can be selected in occasions where the processing requirements are not high and the capital budget is limited.

2. Spindle unit

The spindle unit structure builds a bridge between the tool and the work piece, and it is a key component of the entire equipment. It is used to connect the tool and the work piece for contact, which is the ultimate guarantee of machining accuracy. The price of the spindle unit generally depends on two points, one is the equipment speed, and the other is the cooling method. The common machining center speed on the market is usually 8000 rpm, which can be increased or decreased according to the actual processing needs of customers. The spindle speed is different, and the price is different. Cooling equipment is also one of the indispensable parts of the spindle. The equipment will generate a lot of heat under high-speed processing. The heat of high chips attached to the machine table and the surface of the work piece will not only affect the processing accuracy of the work piece, but also cause the equipment damaged. So, the cooling system is essential for the equipment and it is very important. Usually it is divided into two types, including water cooling and oil cooling.

3. Hard track and linear track

Hard rail refers to a casting in which the guide rail and the bed are integrated, and then the guide rail is processed on the basis of the casting. Linear guides usually refer to rolling guides, which are the kind used in linear modules that are often used in the machine tool industry now, and they are usually called linear guides. The track is fast and accurate. The hard rail has good rigidity, heavy load, and strong heavy cutting ability. There is no difference between the advantages and disadvantages of the two, and the choice is based on your specific processing needs.