Accordingly, several researchers have attempted to develop a young coconut fruit trimming machine (Harach and Jarimopas, 1995 and Jarimopas and Pechsamai, 2002). Unfortunately, their machines were unacceptable to growers, processors and traders. However, more recently, Jarimopas and Ruttanadat (2007) developed a prototype of young coconut fruit trimming machine which appeared to have more potential. The machine was based on the lathe cutting machine mechanism and was composed of a lathe machine with a body-trimming knife, a shoulder-trimming knife, a base-cutting knife, and clamping mechanisms. The prototype had the capacity to trim 21 fruit h−1, with the finished product on average containing 1.1% of untrimmed green area and 0.2% of fibrous area. The fruits trimmed by the machine were accepted by fruit traders and exporters. However, about 70% of machine operating time was lost because of the need to manually reposition and hold the fruit, and readjust the knife for each trimming operation. As a result, it proved faster to manually trim fruit than to use the machine.