Re: BP II duplicator conversion

Marv...I would be interested in seeing this solution. Jon recommended a similar approach. Must be that one then devises a ball screw drive to raise and lower once the knee is balanced?? Richard.

> Guys,
> One of the group recently sent me some photos of his conversion, and
> one photo shows the knee being counterbalanced by two 150 lb. gas shocks
> from McMaster-Carr. If you'd like to see them, I'll dig it up, and put you
> in touch with the guy.
>
> Marv Frankel
> Los Angeles
>
> ----- Original Message -----
> From: "Brian" <ka1bbg@w...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Tuesday, December 31, 2002 3:46 PM
> Subject: Re: [CAD_CAM_EDM_DRO] BP II duplicator conversion
>
>
> > Hi, well a hefty set of gas shocks can counter weigh a knee.. some one on
> > this list is doing that. cul brian f.
> > ----- Original Message -----
> > From: <rfs@c...>
> > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > Sent: Monday, December 30, 2002 7:54 PM
> > Subject: [CAD_CAM_EDM_DRO] BP II duplicator conversion
> >
> >
> > > Advice please...I have access to a BP series II machine with the x,y,
> > > and z axis all driven by hydraulic motors. The motors are controlled
> > > by a device I am not familiar with but strikes me as being like a
> > > digitizers with a probe. Push the probe in certain directions drives
> > > the x/y table and the z axis. All axes have ball screws and nuts.
> > > Since this machine is a reasonable buy, would it make a device to
> > > retrofit for CNC?? The hydraulic motors are about the same size and
> > > position as servo's driven BP mills I have seen. The motors appear
> > > to be driving a pulley/belt rather than direct drive. The z axis is
> > > the knee of the machine and not the head. I wounder if servo's would
> > > be powerful enough to move the knee up and down (I don't believe that
> > > the knee has a counter weight system) In place of the machine head
> > > is a long slotted plate for mounting multiple machine heads. The
> > > hydraulic controller is also mounted to this plate. Any advice would
> > > be appreciated. Thanx...Richard in Michigan.
> > >
> > >
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> > OFF Topic POSTS: General Machining
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> aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
> you have trouble.
> > http://www.metalworking.com/news_servers.html
> >
> > http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
> sister site to the CCED group, as many of the same members are there, for OT
> subjects, that are not allowed on the CCED list.
> >
> > NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
> DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> > bill
> > List Mom
> > List Owner
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