A Recognition Methodology for the Key Geometric Errors of a Multi-Axis Machine Tool Based on Accuracy Retentivity Analysis

Table 1

Geometric error terms of the four-axis machine tool.

Errors sources	Symbols	Number
X-axis	δxx, δyx, δzx, εxx, εyx, εzx	1, 2, 3, 4, 5, 6
Y-axis	δxy, δyy, δzy, εxy, εyy, εzy	7, 8, 9, 10, 11, 12
Y-axis	δxz, δyz, δzz, εxz, εyz, εzz	13, 14, 15, 16, 17, 18
B-axis	δxb, δyb, δzb, εxb, εyb, εzb	19, 20, 21, 22, 23, 24
Interaxis	γxy, βxz, αyz, αyb, γyb, δzby	25, 26, 27, 28, 29, 30