Principles and considerations to buy the machine: the ability in the short term, to recover the investment is a good machine tools. First, buy the machine type, we must first determine the business process specifications and technical requirements needed to processed products, according to the process and production lines need to determine the machine type, machine type, there are many, to achieve the best cost performance. Second, the purchase of equipment manufacturers, enterprises choose to select a higher profile as the manufacturers, the focus depends on the level of production enterprises of scale, size and technical strength. Third, choose a certain well-known name brands and brands of equipment, many equipment companies, many have a certain strength of the equipment manufacturer has its own famous products. To improve higher profits, in fact, to purchase a counterfeit, causing the device into mainland users to generate a lot of unnecessary and weaknesses can not be overcome when production. This is a lot of buying equipment can not properly use one of the main and idle. Fourth, the selection system equipment used, generally choose more famous brand system, the key is the choice of system development and the ability to use their own production plant. Five, a variety of raw materials and equipment necessary for the maintenance of information.