A Comparison of Operability and Readability of Four Types of Roary Selector Switches

摘要

A fixed-scale rotary switch can be set faster than three types of moving-scale rotary switches. The more digits exposed, the faster a rotary switch can be positioned. A fixed-scale and three types of movingscale rotary switches can be set with equally high accuracy. The settings of moving-scale switches can be read more accurately than settings of the fixed-scale switch. The fewer digits exposed, the faster and more accurately a rotary switch can be read. It is recommended that moving-scale switches, rather than fixed-scale switches, be used where accuracy of switch position reading is more important than speed of setting. A moving-scale with 3 digits exposed is preferable to moving-scales with 1 or 10 digits exposed, because of advantages in speed of setting, accuracy of position reading, and subjective positioning preference. A hybrid switch should be developed to incorporate the outstanding features of both the fixed-scale and the moving-scale (3 digits) switches. The hybrid switch should result in positioning speeds comparable to the present fixed scale type with a low reading error rate as is found in the moving-scale (3 digits) type. (Author)