Re: [Emc-users] Cylindrical grinder Jones and Shipman

[Marshland Engineering]

I think the slowest headstock RPM is about 110 RPM. I think going down to 10
-20 RPM would be good. 
The gearbox on the headstock also has a lot of backlash. Driving it directly
should fix that.

Thanks Wallace. 


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[Emc-users] Cylindrical grinder Jones and Shipman

[Marshland Engineering]

I've just purchased an old but good Jones and Shipman grinder. While stripping
it all for sand blasting and repainting, it looks like a great candidate for
CNCing. CNC the headstock rotation and the grinder forward/backward travel.  

See here (Not mine) 

http://www.excellmachine.com/products/cylindrical-grinders/

The headstock only needs to turn at maybe 10 RPM, so a 300 - 500 watt motor
should do the job, as the grinder only takes very small cuts in the part. The
main grinding head (80KG or so) will need a bit more. 

I can still use the automatic table travel and use a micro switch to increment
the grinder travel for longer parts. 

I would like to eventually grind engine camshafts and I think this will do the
job. 

Any comments ?

Cheers Wallace


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Re: [Emc-users] Cylindrical grinder Jones and Shipman

[Dave Caroline]

 A good make from near me (30 miles ish,) I imagine a cnced version
would be useful

Dave

On 06/10/2015, Marshland Engineering  wrote:
> I've just purchased an old but good Jones and Shipman grinder. While
> stripping
> it all for sand blasting and repainting, it looks like a great candidate
> for
> CNCing. CNC the headstock rotation and the grinder forward/backward travel.
>
>
> See here (Not mine)
>
> http://www.excellmachine.com/products/cylindrical-grinders/
>
> The headstock only needs to turn at maybe 10 RPM, so a 300 - 500 watt motor
> should do the job, as the grinder only takes very small cuts in the part.
> The
> main grinding head (80KG or so) will need a bit more.
>
> I can still use the automatic table travel and use a micro switch to
> increment
> the grinder travel for longer parts.
>
> I would like to eventually grind engine camshafts and I think this will do
> the
> job.
>
> Any comments ?
>
> Cheers Wallace
>
>
> --
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>

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Re: [Emc-users] Cylindrical grinder Jones and Shipman

[andy pugh]

On 6 October 2015 at 10:24, Marshland Engineering
 wrote:
> CNC the headstock rotation and the grinder forward/backward travel.

You may not need to CNC the headstock, you can possibly just slave the
wheel to the headstock encoder.
This is what is happening here: https://www.youtube.com/watch?v=FpP7iTKuWpw
The spindle is turning slowly with the normal spindle motor, and the
X-axis is following that.

-- 
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

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