Originally Posted by haylillan
what is the difference between rotary and vibrating shuttle machine?
Rotary is a round bobbin, and is stationary under the machine, spinning in a circular motion. Vibrating shuttle is a "long bobbin" (looks like a little barbell) that fits into a bullet looking shuttle that swings back and forth under the bed of the machine.
Here's a link that explains Transverse, Vibrating and Rotary shuttles.
http://en.wikipedia.org/wiki/Bobbin_driver