Re: [CAD_CAM_EDM_DRO] How do I add CNC to a lathe?

Hi,

I uploaded some pictures of my Harrison CNC/Manual lathe to the TurboCNC
group, give them a look and I'll be happy to answer any questions you have
now that it is all working. There are a number of fail-safe bits that stop
you running it in manual power feed when it is in CNC mode and vis-versa.

http://photos.groups.yahoo.com/group/turbocnc/lst?.dir=/Harrison+280+Manual+
CNC_Trainer&.src=gr&.order=&.view=t&.done=http%3a//photos.groups.yahoo.com/g
roup/turbocnc/lst%3f%26.dir=/%26.src=gr%26.view=t

I'd like to know how you went about converting your Bridgeport as I have a
clone I'm just starting work on.

Regards,

Terry

> OK I'm hooked. I just finished the hardware end of converting my
> Bridgeport to CNC and now I'm ready to tackle my lathe. Problem is,
> I'm clueless from a mechanical standpoint (I'm OK now with stepper
> electronics and control circuits - I think) where to begin.
>
> I have a Logan lathe circa 1943. The max swing from the center of
> the chuck is 5.5" (does that make it an 11" lathe?). The gears to
> make various threads have to be hand changed on this model. It's
> belt driven. It does have motor driven feed on the carrage and the
> cross feed. Any guidance on where/how the motors should be mounted,
> as well as any other mechanical things to look for would be
> appreciated. Any place I can look for diagrams? Is this project
> even worth it or should I leave well enough alone?
>
> Thanks and regards,
> Jeff