Abstract
Ergonomic studies were performed to design an mproved type of the universal laithe. Layout of controls was especially considered so that they may be concentrated within the operator's reach according to their functional importance and to the sequence of operation. The diminution of the number of controls was also intended. The required force for the tail-stoch controls was reduced. In order to evaluate the new model, operation time and processing time were measured and motion study by means of memomotion technique and cyclegraph was performed. The results showed conspicuous reduction of operation and processing time, frequency of hand or foot motions and body bending as compared with laithe of older types.
