Nikaido Marmelstein Murray & Oram, LLP
Dynamic error correcting system in a numerically controlled machine tool
 A feedrate and travelling distance before the feed orientation of a feed drive axis is obtained by analyzing NC programs when carrying out a machining action, and the lost motion correcting quantity corresponding to said feedrate and travelling distance is calculated by using the relationship obtained in advance by experiments. Furthermore, the lost motion correcting quantity obtained by calculations is overlapped onto the instruction value to a servo motor which drives the feed drive axis, when the feed orientation of said feed drive axis is reversed. 
OKK Corporation
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Y10T G05B G05B B23Q Y10T Y10T B23Q Y10T Y10T G05B
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Mikito Kazunori Hiroshi Hideo Koichi
Kumagai Masamoto Yamashita Nakagawa Ito