Back to printing ball bearings. The best way is not to do it. Buy sealed bearing units and press them into a printed recess. But large diameter sealed bearings can be expensive. The next best design is to buy metal balls and print the races and assemble them. Printing the rollers never works well. If you want everything to be made of plastic buy the plastic balls used by "airsoft" guns. These make pretty good bearings, much better than you can print and 2,000 balls, 6mm in diameter cost only $10.
If you like a challenge, try printing a sealed ball bearing unit on one "go". It can be done as a stint but does not make a good bearing for use in a machine. As for getting plastic to stick to glass try cleaning it very well with "Bar Keepers Friend". The stuff is a powder like "Comet" but is acidic and is much better for removing oils and such from fingerprints. Hairspray usually works too. On Sun, Mar 28, 2021 at 1:31 PM andy pugh <[email protected]> wrote: > On Sun, 28 Mar 2021 at 19:18, Gene Heskett <[email protected]> wrote: > > > PEI? If you mean the black stuff shipped with overture filament thats too > > small for an ender 3, > > All the PEI film I have seen has been a transparent amber colour, > similar but paler than Kapton. > > > > An occasional wipe with an alcohol-soaked rag helps on the occasions > > > when adhesion isn't working. > > > > Paint store alky I assume, or is 91% good enough? > > Isopropanol. Also what I use for cleaning flux off of PCBs. > > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is > designed for the especial use of mechanical geniuses, daredevils and > lunatics." > — George Fitch, Atlanta Constitution Newspaper, 1912 > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
