A Novel Rotor Profile Error Tracing and Compensation Strategy for High Precision Machining of Screw Rotor Based on Trial Cutting of Limited Samples

Table 1

The proportion of internal error factors.

Factors	Proportion
Geometric errors	35%
Thermal errors	18%
Force errors	12%
Wear of forming tool	10%
Deformation error of workpiece	8%
Setting error	3%
Fixture error	5%
Others	9%