Here's an elbow //elbow in pipe $fn=90; wall =3; //thickness of wall length =100; //length of each pipe angle = 120; od =30; // outside diameter module rod(){  cylinder (h=length,d=od); } module os(){   rod();   rotate([angle,0,0]) rod();   sphere(d=od); } module bore(){   cylinder(h=length+5,d=od-wall-wall);   sphere(d=od-wall-wall); } module is(){   bore();   rotate([angle,0,0])bore(); } difference(){   os();   is(); } On 02/07/2022 23:09, Dave wrote: > I've been using OpenScad for quite a while and find it fits with the > way my mind works in a way that many CAD tools don't. > > But I have a need to generate a bend in a pipe and I'm having > difficulty putting it down in scad and I'm hoping for some > help. > > In essence I need to generate a pipe that is 30mm in diameter with a > wall thickness of (say) 3mm with a bend of 120 degrees. > > It could ether be a smooth bend or a sharp bend - although the latter > would be more useful due to space constraints. > > I can sort of see how I might generate a cylinder and diff it with a > cube at an angle, but I cannot see how to join two such > cylinders to form a watertight solid without a lot of fiddling - there > must be a better way. > > Any clues, tips, examples very welcome, > Dave > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org