Hi Doug, Regardless of how we do it, the same work is accomplished. W=F*distance, a scalar function. But, the instantaneous force required varies according to the geometry of the opposing force. On a 5cm stick, the first cm will shear easier than the second, etc. until the maximum diameter is passed through. Moving to an air cylinder certainly would complicate things while still not providing the maximum thrust at the right time--halfway through the shearing cut. Is there no wind, or oxen or other beasts to raise a guillotine to a trip point? An air cylinder implies first-world power sources and I thought that that was what we were without.
Best regards, Mark -----Original Message----- From: Gasification [mailto:[email protected]] On Behalf Of Doug Sent: Thursday, January 23, 2014 7:36 PM To: Discussion of biomass pyrolysis and gasification Cc: Discussion of biomass cooking stoves Subject: Re: [Gasification] Mk2 Chip Guillotine Hi Jason and Colleagues, Having started this thing, thought I had better try out your idea. I had reservations about the leverage which proved to be right, as the foot push ends up taking a lot more effort. The disc blade has to drop 4" and in doing so, the link point moves out 2". Given time and some $$, I thing the best solution for the actuation would be an air cylinder with a 5 port valve control "if" you needed to process large amounts of specifically sized fuel. Of course you could also use a crank and fly wheel. It's amazing what you can find quite usable in scrap yards. Doug Williams, Fluidyne. On Tue, 21 Jan 2014 17:56:55 +1300 Jason <[email protected]> wrote: > Doug, > > would your design objective make it feasible to make that cutter foot > operated with a return spring? > > Closest thing I can find with a short search is a foot operated > grommet press. http://navyaviation.tpub.com/14218/css/14218_230.htm > > Jason _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/
