Why is the accuracy of my woodworking machine down?

The decrease of the precision of woodworking machinery is a large part of the reason is that the guide rail, the need to check the wear of the guide rail, serious wear will lead to unstable operation, affecting the accuracy of woodworking machinery. 

The flatness of the countertop is also an important reason to affect the machining accuracy, we tend to ignore this situation, woodworking machinery in the use of a long period of time will be under great pressure to cause deformation, this situation will often appear in poor quality woodworking machinery, igoldencnc production of woodworking machinery are very strong, It won't deform for many years.