TENSION DETECTING DEVICE AND TENSION CONTROLLER

摘要

PURPOSE: To detect tension in plural modes by arranging a freely rotatable guide roller in slidable contact with a tape as a tension arm on one end side and regulating a space with a rotary shaft. CONSTITUTION: An output voltage from a Hall element 15 for tension is so small as about 0.65(V) in a range of tension of 11-20(g). At the time of calculating tension as a load on the tape by using this output voltage curve, a tension amt. can accurately be detected by utilizing a linearlike tendency of this curve. A linear output voltage characteristic is shown enough even in a region of low tension of 6-8. Consequently, accurate tension can thus be detected in a tension detecting rage of 7-20(g).