Assuming you want to machine it rather than 3D print it, consider Tufnol. https://www.theplasticshop.co.uk/tufnol-whale-brand-sheet-rod-tube.html
On Mon, 10 Oct 2022 at 23:40, gene heskett <ghesk...@shentel.net> wrote: > On 10/10/22 11:35, Thaddeus Waldner wrote: > > 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. > My experience is that PETG is the quickest way to separate the men from > the boys. I have a house full of 3d printers > that have all self destructed when asked to live on a steady diet of > PETG. Right now I have two printers that fit the just > works description, an $800 Prusa MK3S+ I've put a bondtech LGX extruder > and a mosquito hot end in, which brings > that printer up to about $1400 for total outgo. > > And an Ender 5 Plus with much the same story, as I just put a whole new > 4 wheel carriage on it I designed and printed > in PETG+CF, carrying an ldo orbiter v2 extruder on top of the brand new > creality Spider hotend with a 70 watt heater in it. > Its bed is very slow to heat, 6 to 7 minutes to get to 80C for PETG. So > I heat it first. Its currently working well with > PETG+CF in it, making parts for a woodworkers vise screw, 8 up. > > And while I was debating on what to do with the ender, I bought a > tronxy-400, but I'm still fighting with them over > a data cable long enough to reach the display if I mount it higher than > the bottom rail as I put casters on it and > its on the floor. That's a very impressive printer, no POM wheels, solid > steel wheels on good bearings on everything. > They actually make it in 500mm cubed and 600mm cubed for a bit over > $1100. That one comes with casters as it > lives on the floor.But I suspect it will at least need the 300C rated > Creality Spider hot end, and for sure will need > more bed power as its around 11 minutes to an 80C bed. I am a CET, so > that is not a problem to rig the bed heat power > as a signal for a 40 amp SSR switching line power to heat the bed. That > will leave enough power to run a 70 watt heater > in the hotend. But I've got to get it someplace where I don't have to > lay on the floor to run it. At 88 yo, getting back up > off the floor is a PITA with a knee that dislocates itself w/o any great > effort. > > 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. > That's a problem with the ender 5 plus, I've ditched the bltouch in > favor of a steel bed sheet and an inductive sensor, > the finish on the bed sheet is as rough as a house shingle, and if it > sticks at all, I can't get a sharpened putty knife > under it to remove failed prints. To get good adhesion, I've got to > bring the diamondback nozzle down to not more > that .05mm or less clearance. A cash register slip is still too thick to > be a usable gauge. > > After this job is done, next is a trip to the kitchen sink and scrub > hell out of it with comet or babo to put more microscratches > on it to improve adhesion. That's the best treatment I've found for poor > adhesion so far. And keep your fingerprints off it. > > 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. > > > That's where a trip to Lowes for DIY stuff comes in. ;o)> > > Take care and stay well, Thaddeus, and thanks. > > 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
