“…Even after mathematical modeling, calibration becomes susceptible to slight changes in setup. Consequently, only a few calibration methods have been practical, simple, economical and quick enough for use with industrial robots (Abderrahim & Whittaker, 2000;Hosek & Bleigh, 2002;Meng & Zhuang, 2001;Meng & Zhuang, 2007;Pena-Cabrera et al, 2005;Perks, 2006;Young & Pickin, 2000;Zhang & Goldberg, 2005;Zhang et al, 2006).…”