The reason why PLA and PETG work so well with 3D printers in the first place is due to their low thermal expansion coefficient and relatively low melting temperature.
PC is much more difficult to print because it has a higher melting temperature and a higher thermal expansion coefficient. My experience with straight PC is that it will not print reliably unless you have an enclosure that you can bring up to near the glass transition temperature. This keeps the freshly-laid plastic from shrinking excessively because it doesn’t cool down as much. But more importantly, the whole part remains somewhat soft, so the shrinking forces are more easily overcome by your bed adhesion. If you have a nice enough printer, I hear say you can even print stuff like PEEK. My experience is also that “high temperature build envelope” is also the thing that makes 3d printers much more expensive. > On Oct 10, 2022, at 9:32 AM, gene heskett <ghesk...@shentel.net> wrote: > > On 10/10/22 07:38, andy pugh wrote: >> On Sun, 9 Oct 2022 at 11:10, Nicklas SB Karlsson <n...@nksb.eu> wrote: >>> Polyoxymethylene (POM) https://en.wikipedia.org/wiki/Polyoxymethylene ? >> I have a reel of POM filament. It's terrible to print with, and really >> doesn't want to stick to the bed. >> > I'm in that boat with a $50 roll of polycarb, aka PC. I even bought some > special glue stick for PC. > That stuff bounces off everything including package tape. > > Cheers, Gene Heskett. > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author, 1940) > If we desire respect for the law, we must first make the law respectable. > - Louis D. Brandeis > Genes Web page <http://geneslinuxbox.net:6309/> > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
