Re: [Emc-users] bicycle wheel, to machine

[<am...@co...>]

hi
that shop makes bicycle wheel out off carbon fiber and all machining is in
trimming Extra stock of fibers, gives some shape to the ream where robber
part will be attached latter. So I think that if some kind unit – spindle
with chuck of 20 inch where I can add spacers to the jaw be better thing.
it is very light cut machine.
Thank you
Aram



> John Kasunich wrote:
>> am...@co... wrote:
>>> Hi
>>> Small shop here want to mechanize machining of bicycle wheel – ream. I
>>> want to find better and less expensive way to build CNC type machine
>>> with
>>> EMC2.
>>> What is the best way to assemble frame of that machine?
>>> Are there some spindle with chuck as a modular unit to I cam mount it
>>> on
>>> the table?
>>> Any ideas?
>>> Any way to find part of large lathe, or grinder that spin large wheel
>>> and
>>> it can spin instead bicycle ream?
>>> Thank you
>>> Aram
>>
>> The traditional way to machine short, large diameter parts, is with a
>> T-Lathe.  That has the bed at right angles to the spindle, a large
>> diameter chuck or faceplate, and no tailstock.  For example:
>
> I just realized that a vertical spindle lathe would also work, and might
> be easier to load and unload, since gravity would hold the rims in place
> while you center them up.  The pictures below are much larger and
> heavier than would be needed for bicycle wheels, but they should convey
> the proper idea.
>
> http://www.shzhoule.cn/english/admin/upload/2007830145232661517.jpg
> http://img.alibaba.com/photo/50995654/Vertical_Lathe.jpg
>
> As with the T lathe, if you don't need to machine the center, the X axis
> can be much shorter - you probably wouldn't need the "bridge" shown in
> the photos.
>
> Regards,
>
> John Kasunich
>
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