[Gasification] Mk2 Chip Guillotine

Bob Stuart bobstuart at sasktel.net
Thu Jan 23 22:30:02 CST 2014

I'm sure that an arrangement can be found to work with a foot  
treadle.  The legs have the biggest muscles, but to use them  
effectively, an alternate support such as a bicycle seat is often  
needed, and as usual, impedance must be matched and ergonomics  
considered.  Here's a recent invention just using a heavy, hinged  
maul and a support spring to make a splitting operation far easier:   
http://www.wimp.com/choppingfirewood/  Notice the operator giving the  
weight an initial lift.  The hand is often more subtle than the leg  
linkages we build.  If the legs are needed for  moving during  
material handling, a single treadle with a low initial "gear ratio"  
is good.  If the feeding involves a lot of side to side motion, a big  
rocker might harmonize with that.

Bob Stuart

On 23-Jan-14, at 9:35 PM, Doug wrote:

> 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 <urepedese at gmail.com> 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
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