To meet the demand of ultra-precision machining for large-size optical components

the research group further developed high-precision surface grinder UPG80 on the basis of the two self-developed grinders

MK7160 and 2MK1760. Compared with most existing large-caliber surface grinders and MK7160

2MK1760 grinders

UPG80 used more advanced key supporting technology

including hydrostatic support technology

grinding wheel dressing technology and intelligent monitoring system. In this paper

the static accuracy of UPG80 grinder was tested

and a three-axis error model was established to compensate the error of the grinder. On this basis

the optical components with 530mm×530mm diameter were machined by diamond circular arc grinding wheel

and good processing effect was obtained

which verifies the reliability of the grinder