re:Re: old sherline Y travel

Alan,

orig. snipped and answers introduced below

>That might let me swing the tile table around! Must clear the Y
>motor.

Yes, you may need to add spacers to clear the Y drive motor.

One thing I find useful for this sort of thing is HSS lathe tool
blanks.

Cheap, reasonably accurate, and available in several sizes.Used in
pairs, they are great for small setup jobs like this. On a
sherline,be careful! The ground steel can easily cut into the soft
alumunum of the sherline.

>> You could also "mill" this on the CNC sherline, if your lathe won't
>> swing it. Set up with a pivot on the "extension table" above, and
>> mill "hextants", including the rim and outline! Without the rotary
>> table! Just use circ interp. Spin it in a drill press to polish out
>> the "mill" marks and ADD "lathe" marks <G> and no one will know it
>> wasn't done on a lathe.

>Circular interpolation would be fine, if I could swing all the way
>around the part! 2 or 3" throat/travel is quite limiting!

You might have missed my point here?! You don't need to do the ENTIRE
part in one go! Just program 60 degrees of the part, which should fit
in the 3 inch travel you have available. Then, use the repeat-
ablility of your CNC to duplicate this 5 more times! The circ interp
I spoke of would really be ARC interp, in this case.

Hope this helps.

Ballendo