In view of the shortcomings of the existing tool setting methods

we proposed a new method of tool setting for micro-milling tools based on in-line holographic imaging. After researching and analyzing the holographic imaging principle and key problems of holographic image

a set of digital holographic tool setting prototype was built

and the micro-milling tools was measured on a five-axis machining center using a standard tool. The experimental results show that

the holographic tool setting prototype can effectively realize the detection of micro-milling tools

and the relative accuracy of this instrument is 5.1μm. Under the same detection conditions

compared with the measurement results of a high-precision external presetter

the relative error of the tool setting instrument is 0.033%

while the relative error of the holographic tool setting prototype is 0.007%

and it can effectively realize the detection of micro-milling tool. This results verify that holographic imaging method can be used for the high-precision tool setting of micro-milling tools.