Change in Revolution Speeds of Band Saw Wheels and Power Consumption During Sawing

It is said that the revolution speeds of band saw wheels change during sawing by the load acting on the band saw. However, there are few quantitative data on such change during sawing. In this study, the revolution speeds of the band saw wheels were measured precisely with rotary encoders, in order to examine the influence of sawing condition on the change in revolution speed and the power consumption during sawing. The revolution speeds of band saw wheels decreased along with the start of sawing, and then it resumed closely to the idling revolution speed level. It increased immediately after sawing and then it came down to the idling revolution speed level before sawing. The power consumption increased rapidly simultaneous with the start of sawing and then it decreased gently. After sawing, the power consumption decreased rapidly and then resumed the level for idling. The differences between the maximum and minimum revolution speeds of band saw wheels during sawing increased with an increase in feed speed and also with an increase in depth of workpiece. Key words: band saw, band saw wheel, revolution speed, power consumption, change in revolution speed 1