[P-19] Accuracy evaluation method on the five-axis machining centers by Square 3x3 machining Shigehiko Sakamoto1、〇Atsushi Yokoyama2,1、Kazumasa Nakayasu2、Toshihiro Suzuki2、Shinji Koike2、Ryuta Sato3 (1.Kumamoto University、2.Makino Milling Machine Co., Ltd.、3.Kobe University) キーワード:Machining、five-axis machining center、accuracy、evaluation、square 3x3 machining method