RE: [CAD_CAM_EDM_DRO] Bridgeport CNC

Interesting stuff ! On your servo system, how are you detecting servo
position ?

Dave

_____

From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Leslie Newell
Sent: 06 February 2007 20:05
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Bridgeport CNC



Hi Dave,

AFAIK none of the BP CNCs used glass scales. Mine originally used
steppers. On the steppers it was pretty slow and every so often lost
steps. After cooking several drives I gave up in disgust and threw out
the steppers. I replaced them with servos made from modified treadmill
motors and using Gecko drives. It is all controlled by an industrial PC
running Mach3. The machine now does 2.5 m/min (100IPM) easily and has
enough torque to snap a 10mm carbide cutter without even noticing.

Les

Dave Fisher wrote:

> I am also about to embark on conversion of a Bridgeport Interact 1 -

Wonder

> if you would care to give
> some more details on the way you went - What amps, what controller, how

did

> you interface the glass slides
> (I think it uses glass slides, for positioning ??) etc.
>
> Rgds
>
> Dave Fisher UK
>
>

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