On Thursday 04 June 2020 21:55:21 Chris Albertson wrote: > On Thu, Jun 4, 2020 at 5:03 PM Gene Heskett <ghesk...@shentel.net> wrote: > > Thats cute. But that would likely need to be made on a resin printer > > as this one from what I've seen so far, simply cannot do that fine a > > detail. > > My "cut" on this would work because the glue joint is hidden inside, > Andy's is smart but does place the glued joint on a working surface. > > > Someone was right, I did have "mold" checked. Uncheckd and new slice > > made, no other changes. But perhaps 3 hours to finish this one, > > One advantage of hollowing out the pulley with a 24mm hole is the > greatly educe print time. I only print the our 5mm of the pulley. > I'm printing four ofthem, four-up at a time now. > > > but its > > up into the pulley teeth but the threads its laying are completely > > random, no teeth, just a rough surface with no real pattern. > > Are these "teeth" the ones that engage the belt or the ones that > engage the set screw?
The belt, no grip at all, looks much better organized on the inside of the wall, but it of course the wrong size there so only about 3 teeth engage. Very poor fill, 10% maybe, no solid wall to support the back of the teeth at all. The top flange is just a lick & a promise. And its hollow, no top wall at all. > Printing a threaded horizontal hole is going > to be way-hard with 0.4mm walls for this just make an undersized plain > hole and then tap it by hand. Or just as well, let it try to make > threads then clean it up with a tap. Vertical hones print better. > > With standard threads in metal, every cross-section is a perfect > circle. A vertical hole is just a stack of circles, something the > printer can do. But horizontal holes have "roofs". The printer can't > print over air so it adds support material inside the hole. I'm sure > this is what you see, In Cura's preview support is blue. > > It is possible to selectively turn supports on and off so the > horizontal holes are not filled with support. But it is a lot of work > I use a hex key to punch out the support from holes. > > If the messed up teeth are the belt teeth then I'm at a loss without a > photo. > > > And no, > > its not loose on the hot plate. : Now, looking at the sprocket code in openscad, it will not render a motor shaft over 9.9mm, using this line of code, no clue what language this is, but its a .scad file, part of the parametric pulley kit. translate([0,0,-1])cylinder(r=motor_shaft/2,h=pulley_b_ht + pulley_t_ht + retainer_ht + 2,$fn=motor_shaft*4); How do I modify this to accept a 2 digit left of . shaft diameter? By stripping this down to 30 teeth and a bottom flange, if I could make the motor shaft big enough, I have the makings of the plastic half of a 2 part pulley. But it will not render if over 9.9 in $motor_shaft setting. Seems like an artificial limit to me. But what do I know. Nothing TBE. 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
