Re: Hybrid CNC RP that's do-it-yourselfable

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Mark Bingham"
<fourthaxis4000@...> wrote:

>
> While you're looking at self-build CNC systems, here's a cool link
> http://www.sellbic.com/eng/col38.html
> from a Japanese company that combines what they call 'injection
> welding' and CNC machining. Their 'injection welding' concept

allows

> many polymers to be chosen and the follow-up CNC shape truing by
> milling, provides accuracy. It's charming because (a) it is

economical

> of material compared with regular SRP and (b) as a hybrid
> additive/subtractive process you can get the best features of both
> worlds, such as wide material selection, close dimension and great
> surface finish. I also like (c) the hollow object capability.
>
> I understand other companies are working in similar fields, at

least

> one of them dispensing photopolymerizable paste rather than hot
> polymer, before CNC mill finishing. Frankly, I prefer the hot

polymer

> idea because the materials are 'real world' and widely available.

The

> same site shows some tiny extrusion cylinders for micro plastics
> dispensing.
>
> This is the kind of technology that could certainly couple a
> micro-extruder to a CNC mill and is do-it-yourselfable.
>
> Mark
> www.fourth-axis.com
>

I agree it is dimension stable,but in my opinion if I've to deposit
then mill it, why not just mill it? cnc machines are cheaper then
the Rp machines plus I already have one, and I'm tired of milling
parts and changing tools :)