Hi all, I would like to advertise my latest labour: PolyGear <https://www.thingiverse.com/thing:3833810> . Any comment, critic, suggestion is very welcome! <img src="http://forum.openscad.org/file/t2340/PolyGear_small.gif" border="0"/> <https://www.thingiverse.com/thing:3833810> -- Sent from: http://forum.openscad.org/

Very Nice! I'll have to give it a try next time I have a project involving gears. In the past I found Parkinbot's implementation suitable for my use. I last used it for my right angle helix drive parts: https://www.thingiverse.com/thing:2943137 <https://www.thingiverse.com/thing:2943137/files> An added option to generate a helix pair like that might be nice. Also the addition of a chamfer option made them much nicer IMO, both in terms of looks(maybe you consider this a "gimmick"), but also handle-ability(the edges can be surprisingly sharp/pointy without it), It maybe even quieter engagement in some cases? Cheers, Hans On Thu, Aug 29, 2019 at 2:12 PM DarioPellegrini <pellegrini.dario@gmail.com> wrote: > Hi all, > > I would like to advertise my latest labour: PolyGear > <https://www.thingiverse.com/thing:3833810> . > > Any comment, critic, suggestion is very welcome! > > <img src="http://forum.openscad.org/file/t2340/PolyGear_small.gif" > border="0"/> <https://www.thingiverse.com/thing:3833810> > > > > > > -- > Sent from: http://forum.openscad.org/ > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >

width = 10;
N1 = 15;
N2 = 23;

spur_gear(n=N1, w=width, helix_angle=constant(45));
translate([(N1+N2)/2,0]) rotate([90,0])
  spur_gear(n=N2, w=width, helix_angle=constant(45));

Thank you for your comments! To generate the helix pair, the following few lines should suffice: / use <PolyGear.scad> width = 10; N1 = 15; N2 = 23; spur_gear(n=N1, w=width, helix_angle=constant(45)); translate([(N1+N2)/2,0]) rotate([90,0]) spur_gear(n=N2, w=width, helix_angle=constant(45)); / If you get less than perfect results, make sure to download the library again as I introduced small fixes here and there https://github.com/dpellegr/PolyGear The chamfer is an interesting suggestion. It is true that I consider it a gimmick in the sense that is pretty trivial to realize it by intersecting the gear with a cone. But since there are cases were it can improve the engagement it may be worth to have it implemented as a mesh modification. I will think about this... -- Sent from: http://forum.openscad.org/

thehans wrote > a chamfer option Done. I cheated a bit since I let cgal do it, but it's fine. With the possibility of having variable helix angles, directly editing the mesh was really too complicated. -- Sent from: http://forum.openscad.org/