Freeform optics are widely used in many fields with its excellent optical performances. Fast tool servo (FTS) diamond turning technology are considered to be very promising technique for freeform surface fabrication. However, some elements may influence the machining accuracy, such as the spindle speed drift, periodical change cutting force, and diamond turning machine (DTM) motion errors. In this paper, an in situ measurement method and an error compensation machining technique are proposed to improve FTS technique machining accuracy. The machined surface profile data is obtained by a linear variable differential transformer (LVDT) and the error compensation machine is implemented by a two degree of freedom (DOF) FTS. The experiment results show that the form error is dropped by 20 % and surface roughness of 18.1 %. This technology is easy to take out that contributes to the application of high precision freeform surfaces in aerospace, military, biochemical medical, communication, and many other fields.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.