Re: [CAD_CAM_EDM_DRO] Re: Counterbalancing & Rong-Fu RF-45 Project

Ian: A Bridgeport milling machine is not exactly a small machine. Just
the table is probably a couple hundred pound,s or more, with nothing on
it. The vise might be 50 pounds or more. That does not include the knee
itself. Or 3 stepper motors at 25 pounds each. A lot of weight to push
up. Gravity does a good job coming down.
I do a few Jaguar racing cylinder heads on this machine. They are 28
inches long and quite heavy. Add that to the mass and you can understand
why string and buckets won't get the job done.

Ian Wright wrote:

> Hi,
>
> All this talk about air rams and gas springs seems a bit high tech and
> OTT
> for a small machine. My recommendation would be for a simple
> pulley, a bit of string and a weight bucket. This system is easy to
> fit,
> linear in operation, easily adjusted and cheap!
>
> Ian
>
> --
> Ian W. Wright
> Sheffield UK
>
>
> ----- Original Message -----
> From: Ron Ginger <ginger@...>
> To: <CAD_CAM_EDM_DRO@egroups.com>
> Sent: 12 July 2000 15:22
> Subject: Re: [CAD_CAM_EDM_DRO] Re: Counterbalancing & Rong-Fu RF-45
> Project
>
>
> > I think the original question on this thread was for a Sherline. An
> air
> > cylinder might be hard to fit there!. The Grizzley mini mill has a
> gas
> > spring inside the column with a bracket up and over the top to help
> lift
>
>
>
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