Re: [CAD_CAM_EDM_DRO] Bridgeport clone conversion

wdp67 wrote:

> Hi all
>
> I am trying to decide what to do, I have the chance to get a almost new Bridgeport 9 x 49 clone for free, my question is should I convert this to cnc or buy an IH, Novakon, Mikini or Tormach?
>
> I have a converted HF mini mill right now that I converted myself using plans from Fignoggle. It works great, but I quickly out grew it in project size. My little hobby is developing into a moldmaking, prototype business. Not complaining, but I am constantly struggling with how to do something on the limited travels of my x2.
>
>

MMM, there are so many options, ways to look at it, etc. I'll try to
point out a few.

A machine that was designed for CNC from the ground up is usually better
(and a LOT easier) than converting a manual machine.
Ballscrews are pretty expensive, and Bridgeports and their clones are
not so easy to fit ballscrews to the quill. Depending on your work, a
knee Z axis drive may or may not be optimum.

Depending on your work, even a real Bridgeport with 12 x 24" travels may
not be big enough. Watch out for clones with seriously reduced Y axis
travel. I've seen some with as little as 7 - 9" of travel.

You need to look at the cost of the ballscrews, assuming this clone is a
typical manual machine with Acme screws. Still, a decent Bridgeport
clone for FREE is a good starting point. If you retrofit your minimill
yourself, you should be able to retrofit a full-size Bridgeport, too.

I don't know the other machines you mention, but I have seen the
Tormach. Not a bad machine at all, but it is TEN GRAND! And, the work
envelope is still smaller than a Bridgeport. You might be sorry with
that one, too.


Jon