Fw: (ET) power steering?

["Herb Crary" <jhcrary comcast net>]

A good source for all manner of items, including linear actuators, is:

http://www.herbach.com/Merchant2/merchant.mv?

This link is to their search page. I have been buying from them since i was
in college in the late 1940's. They had lots of WWII surplus then. They 
have
both new and surplus now.

Herb Crary
Boulder CO
E10M

----- Original Message ----- 
From: "Pieter" <pvcl plitch com>
To: "Elec-Trak Tractor" <elec-trak cosmos phy tufts edu>
Sent: Monday, June 28, 2004 2:39 PM
Subject: (ET) power steering?


> All this discussion of using linear actuators as front or rear lifts got
me
> thinking.
>
> My E-15 has a very heavy loader on it, and the steering is a real two
> handed job.  I was looking around the 'net for info on linear actuators 
> to
> use for a lift and came across an article on an old Yanmar diesel tractor
> converted to electric.
>
> http://www.angelfire.com/ca4/renewables/tracpage.html
>
> Well - why not do the same thing to an ET??  He used a linear actuator
> controlled by a joystick of sorts to steer.  It would be a simple matter
to
> place a linear actuator between the frame and a steering knuckle parallel
> to the tie rod.  I don't think too much force would be required, which is
> good because you want fairly fast response (screw travel), so leverage
will
> be reduced.  There are a number of dish positioners that run on 36 volts
> and use a revolution counting circuit to stop at a predetermined
> position.  If the steering wheel ran an encoder that "told" the actuator
> where you were pointing it, the actuator would then move to that 
> position,
> steering the front wheels.  A dish positioner would be very cheap to
> try.  The hardest part for me to design is the steering wheel encoding
> mechanism.  Any engineers out there?
>
>
>
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