On Monday 17 August 2020 05:21:28 Bruce Layne wrote: > On 8/17/20 3:52 AM, Gene Heskett wrote: > > This one is printing at the same scale as the output shaft, which I > > just remade after finding they were to big to enter the main bearing > > even with help from the assembly screws. So this will have a smaller > > bore, which means I'll have to make a smaller internal spline, and > > that may demand a smaller bearing carrier, as I need it to push the > > splines fully engaged, but only enough clearance from pull-in that > > at the midpoint between the rollers, the tips of the splines clear > > each other, this condition corresponds to the minimum flex it needs > > to work=longest life. > > Maybe you should have started your 3D printing with a baby Yoda like > everyone else. :-)
Actually, the waving cat was on the sd card. Weighs less than a gram, I can see thru it from any angle, OOTB it was that starved for plastic. The flexgears I'm breaking quickly were somewhat similar in that there are pinholes in them that let light sparkle thru. This ones not done yet, it just started on the ramps to the splines and when I saw that I slowed it back down to 90% as I had it up to 170% in the middle of a now thicker and nuch denser 6 wall build. cura settings are for 6 line walls, 15 ipm and 30 ipm. Plate cooldown after 1st layer, 61 to 55, and 215 for 1st layer then 200. Structure under it is called zig-zag, and starts out pretty sparse, but leans into the gaps eventually looking pretty solid. This smaller scaled flexgear changes everything around it, so I'll stetch this one into an internal spline to see if it needs tweaked for size, making scale adjustments as needed and then diddle the scales for the proper size of bearing carrier, which should push it out of round, stretching the sides enough to let the splines hop over to the next one. First pass at all this only half engaged the splines, so it had backlash up the yang. And flexed the flexgear bad enough the splines had 2mm of clearance at the hop-over point. A smaller internal spline will reduce that clearance and the extra flexing that goes with it. The bearing carriers I have made 3 of, measure 74.84mm acroos the bearings, but when figuring scaling, you need to subtract the bearing diameter from both ratios if you want a new SWAG guess for their scale. So they will need to shrink by the thicker walls differences. For a first guess... When the tpu gets here, is its shrinkage different? But I'll likely wait until the micro-swiss hot end kit gets here and installed. Running w/o the sock on the hot block works that heater R about 3x as much. Looking at it, if I could make a baffle that goes into the hot/cold gap, keeping the fans breeze off the hot block, that would be nearly as good as the missing sock, and a heck of a lot longer lasting. A BBLB design for sure. Its possible the micro-swiss kit will be here tomorrow too. > >> 1500 mm/minute for all motion > > > > Thats 3x the top speed setting in merlin. > > You may be seeing mm/second units rather than the mm/minute that I > specified. 1500mm/min = 25mm/sec, fairly slow for a 3D printer. I think you are right. As usual. :) Thanks Bruce. 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) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
