[1] L&L Machinery Ind Co Ltd, Dept Res & Dev, Taichung 41154, Taiwan
[2] Natl Taipei Univ Technol, Grad Inst Mfg Technol, Taipei 10608, Taiwan
[3] Natl Chin Yi Univ Technol, Dept Mech Engn, Taichung 41170, Taiwan
[4] Natl Chin Yi Univ Technol, Grad Inst Precis Mfg, Taichung 41170, Taiwan