On Tue, June 2, 2009 12:37, Craig Falconer wrote: > Vik Olliver wrote, On 02/06/09 15:02: > >> You probably want to drive the tensioner through a worm gear, which >> automatically ratchets. > > How do you slack off the tension later, if there's some kind of one-way > ratchet in there? With a manual release?
You don't. You just run the worm the other way (it is, after all, a worm that turns). Ratchet is probably a poor choice of word. Fundamentally the worm gear prevents any load on the output being passed back to the input. http://en.wikipedia.org/wiki/Worm_drive A
