The perpendicularity between the axes of CNC cutting saw mainly affects the scale accuracy of the workpiece. The typical manifestation of the perpendicularity of Z axis and XY plane is that the surface is uneven when the flat bottom knife is used to mill the plane at a large distance. The typical manifestation of the perpendicularity of XY axis is that the diagonal of the rectangle is not equal.　

The positioning accuracy of NC cutting saw affects the scale error of workpiece, which mainly depends on the precision of lead screw, the compensation ability of control system and the change of ambient temperature. When the machining scale exceeds 300 mm, it is necessary to consider the influence of positioning accuracy on workpiece size.

Numerical control cutting saw, repeated positioning accuracy mainly affects the multi - tool machining, multi - process machining. Engraving machine using roller screw drive, no crawling phenomenon, can complete the micro feed. The repeated positioning accuracy is primarily determined by the control accuracy, which is generally 2 control resolutions.

CNC cutting saw follows the development trend to replace manual operation:

Since the reconstruction project is carried out under the existing conditions of the factory workshop, compared with the new project, it will be restricted by many objective conditions. Therefore, it is necessary for the systematic planning of the project to:

1. Personalization. Meet the factory practice, can fully satisfy the needs of automatic production, deal with the key problems.

2. Economy. Focusing on the cost performance of the project, under the premise of satisfying the automation production requirements, simple, not luxury, as little money as possible, save the cost of transformation.

3. Maximize. With the same renovation cost, we can try our best to improve the degree and level of automation, with less or no labor, and increase the output.

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