A basic structure and mechansim Re: 3D printing, powder spreading

Graham,

Agreed. I immediately noticed the LACK of a backwall on the overflow
hole... So I figured there must be a deflector hidden/obscured by
the machine structure due to our video vantage point.

And it seems that the previous layer does atleast some "wetting" of
the just put down layer. It darkens up as you watch, prior to the
new pass beginning.

Ballendo

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Graham Stabler"
<grezmos@...> wrote:

>I suspect a barrier preceeds the counter-roller so the powder is not
>thrown forward directly at the print head. If you look at the
>machines in the videos you can see that there is some dust on the
>linear bearings so it does get around. Some extraction (to store

box)

>would probably help.
>
>One thing that we must remember when we talk about snow ploughs is
>that the layers are actually really thin, you can often see the
>previous layer if it is coloured.