On Thursday 16 July 2020 09:55:36 Gene Heskett wrote: > On Thursday 16 July 2020 08:19:26 Gene Heskett wrote: > > Greets all; > > > > How fine a tooth pattern have you managed to use as pulleys, made by > > a 3d printer? > > > > I've got some of the motors that were used in the early 5.25" floppy > > drives, 6 wire 12 volt. and all those leftover drivers from junking > > the ones that came with the 6040 mill and the so-called 24 volt > > supply that couldn't run them but backed off to 14 volts when the A > > axis was plugged in. > > > > And I've had a 10" Meade newtonian scope and a polar mount whose > > drives need a redesign to cover as much of the sky as I can see from > > down in my little cul-de-sac. A bigger lathe, and a 3d printer. But > > 5mm belts are a little coarse for both the high gear ratios needed > > and gear sizes too. since the biggest I can make on the ender-3 is > > around 7 inches. > > > > I have fine tuned the sizes of this printer such that a commercial > > belt fits perfectly but this printer uses similar motors with much > > narrower, finer tooth belts. So what I'm asking is, has anyone > > printed a pulley that fits & works with these smaller, finer toothed > > belts? > > No volunteers. I guess I'll find out as I just launched the ender-3 > to do just the rim of a 240 tooth GT2_2 pulley. 8mm tall plus flanges, > and about a 4mm band to fit a 145mm wheel. And I don't even have a > test fit belt for profile 12 in the openscad sprocket generator. A 45 > megabyte gcode file for the enders simple mind. > Well, 52% done, I think I have an answer, and its no, the ender isn't capable of that fine a work. OTOH. it may be the extruder needs warmed up. I have one of the modified tip fan bottom ducts on it and that may be cooling the pla too fast, making it difficult to melt into the next layer down, causeing it to drag/follow the head as it moves on. I can see the tooth pattern but its ragged as can be. Bed temp at 70C for the first layer seems to be about right. I'll let this one finish, then rerun the slicer to raise the extruder temp 5C for the whole run (215 first layer, 205 till done,) which should prove my theory, or tell me I'm wrong. Sure would have been nice if this thing came OOTB better calibrated though. OOTB delivering 15% of the pla it needed was a bit of a dissapointment in what a 3d printer could do. I printed the waving cat as a first test, used about a yard of pla, and I can see right thru it...
Extruder temp should be trimable by 15C right at the printers control panel IMO, having to rerun the slicer to change that is BS. 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