Re: Van Norman #12 Milling Machine

----- Original Message -----
From: Jon Elson <jmelson@...>
To: <CAD_CAM_EDM_DRO@onelist.com>
Sent: Monday, January 24, 2000 9:45 PM
Subject: Re: [CAD_CAM_EDM_DRO] Van Norman #12 Milling Machine


> From: Jon Elson <jmelson@...>
>
>
>
> PTENGIN@... wrote:
>
> > From: PTENGIN@...
> >
> > In a message dated 01/23/2000 8:26:26 PM Hawaiian Standard Time,
> > jmelson@... writes:
> >
> > << Unfortunately, those would be BIG gas springs. Maybe, one could
come up
> > with old oleo struts from aircraft landing gear. That would be about
the
> > right size.
>
> > How do they keep the force more or less constant on those gas
springs? I
> > also considered pneumatic cylinders. However, like a regular spring, the
rate
> > changes depending on where in the travel you are.
>
> They have a larger, outer tube, that makes a gas tank, essentially. It is
> just slipped over the actual cylinder, and welded on. There are holes at
the
> desired point that allow the tank to connect to the top of the cylinder.
> The piston rod generally comes out the bottom, but I've seen them done
> both ways.
>
> > I considered a regulator
> > but then you need a compressor to admit when low and the regulator to
dump
> > when over pressure. Maybe if we got a really large cylinder and ran low
> > pressure.....
>
> The only problem with this is that the machine will drop, by itself, some
> hours after the compressor is shut off. Not a good idea. Relieving
regulators
> are no big deal, most of mine are. But, most of them will do funny things
> when the compressor is shut off.
>
> Jon
>
>
> --------------------------- ONElist Sponsor ----------------------------
>
> Save 50 percent at MotherNature.com. See site for details
> <a href=" http://clickme.onelist.com/ad/MotherNature ">Click Here</a>
>
> ------------------------------------------------------------------------
>
> Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the
discussion of shop built systems in the above catagories.
> To Unsubscribe, read archives, change to or from digest.
> Go to: http://www.onelist.com/isregistered.cgi
> Log on, and you will go to Member Center, and you can make changes there.
> For the FAQ, go to http://www.ktmarketing.com/faq.html
> bill,
> List Manager
>
>