1, functional requirements: the design of precision equipment parts should first meet its functional requirements.

2, reliability requirements: in order to make precision equipment parts in a certain time and under certain conditions of use effectively to achieve the expected function, it requires its work safe and reliable, convenient operation and maintenance. Therefore, the parts should have a certain strength, stiffness and vibration stability and other working ability.

3, precision requirements: precision is an important technical index of precision equipment parts, the design must ensure the precision required when precision equipment parts work normally.

4, economic requirements: precision equipment parts can be manufactured most economically, which requires parts simple structure, material saving, good technology, as far as possible to use standard size and standard parts.

5, appearance requirements: the design of precision equipment parts should make its shape beautiful and generous, soft color.