Re: lexmark 3d printer is back (binder & build matl)

Guys - we were going to try dental alginate in our machine, but never
got around to it - in "cup" tests, however, it seemed to perform just
as well (time to solid, absorption, heat, etc) as our original
high-performance build material. We also tried a bit of molder's
plaster (it does feel finer than wall-patch) with equaled success, so
spread-ability is the real determining factor here (stabilizers and
de-cakers really don't apply to our typical storage times!)

I don't know which post it was, but I think I recall one of you
mentioning that perhaps "adding a glue to the build material"....ZC
announced on their price list just recently a new premium performance
build material with binder added for greater green strength...small world.

Ted.

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "afogassa" <afogassa@...> wrote:
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Graham Stabler"
> <grezmos@> wrote:
> >
> >
> > > Santa stop by to help me out :)
> > > The roler came from a old lexmark laser printer toner cartridge.
> > > it's aluminum an about 30mm diameter.
> > >
> >
> > I used to have a nice roller like that but thought I would never
> need
> > it, should be easy to find one though.
> >
> > What about the rotation speed, have you synced it to the movement
> of
> > the gantry or did you just experiment? How well does it work and
> do
> > you think the plaster used is of great importance, you used zcorp
> > stuff right?
> >
> > Cheers,
> >
> > Graham
> >
>
> I'm using just plain plaster, it does not spreads nice.
> Zcorp plaster is granulated, almost like refined sugar, it should
> spread very nice, I don't have enough zcorp powder to fill the
> feeding bin with it, so can't tell for shure.
> i've tried refined sugar and it spreads very nice.
> The rotation speed was just to get the powder spread,not shure at
> what speed it's rotating, I guess it's about 200rpm.
> The type of plaster is very important, as it should spread without
> lumps.
> There is a granulated dental plaster that I've to check it out.
> I think that the main thing is to get the right binder or glue to
> hold the plaster particles togheter and does not clog the printer
> head, that's a tough one.
>