Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@g...> wrote:
>
> On Tue, 13 Dec 2005 19:39:37 +0100, Mycroft2152 <mycroft2152@y...>  
> wrote:
> 
> > Back to the original 'train' of thought... Not
> >
> > everyone has a spare valve spring in their workshop.
> >
> > The rubber ball would replace the spring in a long
> >
> > lever drill press.
> >
> >
> > The 'wobble' would be controlled by the type of hinge
> >
> > used, not the ball or spring.
> >
> >
> > It seemed that, an auto shock absorber was a clever
> >
> > use, it was a serious overkill and huge for a simple
> >
> > driller with a few mm travel. Now if there were some
> >
> > 10 cm shock abosrbers, it would be different.
> >
> >
> > Myc
> 
> 
> AH, i see, just to balance the pivoting arm!
> I thought (and still do) the car shock absorbers were intended to be 
used  
> as linear slides for a non-pivoting type of press.
> 
> I don't think it is very difficult to find a spring, and a 
counterweight  
> on the back of the arm works well here, but a rubber ball of some 
sort  
> would surely work as well. I reckon even rubber bands can be used if 
some  
> standoff mechanism is used.
> 
> ST
>




My "back door car shock absorber" is a gas spring. You can see it at 
http://www.mcmaster.com/
Yes there is some missunderstandings here ;-)
I talk about a linear slides for a non-pivoting type of press. A 
absolutly now play one. This is not a 1 hour project, but 2-3 hours...
Take a look here for a simple schematic:
http://tinypic.com/view/?pic=ilfuh1



Adrian