SinMen, yes we DO know what a vibratory slide rule is, although people have referred to it by different names. Those of us who use the slide rule can?t live without it! And we?re NOT kidding!
Statistically speaking, the average slide rule is only 5 ¼? in length, and that is when fully extended. Since lots of folks have used their vibratory slide rules satisfactorily on vibratory feeders of varying lengths, size must not be a major issue, at least for most of us.
It?s how you measure (up) that counts!
Happy measuring!