Re: Home made CNC rotary table??

Thanks for the links. Why would I need a separate controller to
control the rotary table? I would just power it with a 4th gecko and
use my CAM software to create the gcode. Is there any other reason
to have a separate hand held controller for a rotary table?

Jeff



--- In CAD_CAM_EDM_DRO@y..., "stevenson_engineers" <machines@n...>
wrote:

> --- In CAD_CAM_EDM_DRO@y..., "jeffdavis516" <cadman@p...> wrote:
> > I'm wondering if anyone here has any experience with making your
> >own
> > CNC rotary table. I'm not interested in the small one from
> >sherline
> > but maybe a 6" or 8" size. Has anyone taken a standard one and
> > somehow removed the backlash and added a stepper or servo motor

to

> >it?
> >
> > Maybe there are places that sell ones ready that are not too
> > expensive :)
> >
> > Thanks
> > Jeff Davis
>
> Jeff,
> Take a look at http://www.divisionmaster.com
> Have a look at the examples page and also have a look at the
> following three files.
> http://homepage.ntlworld.com/machines/5cga.jpg
> http://homepage.ntlworld.com/machines/5ccomplete.jpg
> http://homepage.ntlworld.com/machines/vertex_GA.jpg
>
> The first file is a general arangement shot of a standard el cheapo
> J&L 5C spin indexer being converted. The worm gearbox is a standard
> popular Italian reduction gearbox that is very common in the UK and
> also cheap.
> Second shot is the finished indexer with a samll 3" 5C chuck fitted.
>
> Last shot is an 8" vertex table converted to stepper drive and

being

> driven by the Division master unit on a manual Bridgeport.
> This is a shot of cutting some pneumatic face seal valves.
>
> The Divisionmaster is similar to the Sherline unit but because

it's

> more versatile it's only just reached the market.
> You can program this for jog speed, cutting speed, number of
> divisions of the reduction, backlash and motor amps to name a few
> points that differ from the sherline unit.
> It also puts out step and direction so you can drive bigger units
> with it. I have mine running a Gecko 210 on 74 volt 7 amp to run a
> big Hoffman dividing head powered by 1,100 ox in type 42 stepper.
>
> John S.