On Thursday 04 March 2021 11:00:21 Dr. Nikolaus Klepp wrote:
> Something like so:
>
> $fn=$preview?$fn:180;
> h = 5.25 ;
> r1 = ( 73.6/2.000000 ) ;
> r2 = ( r1 + 2.6000 ) ;
> rotate_extrude(angle=123) {
> translate([r1,0]) square([r2-r1,h]);
> }
>
Which does exactly the same as my code, EXCEPT the extrusion is upward
from the anchor line, as opposed to centered on it. To the printer, no
diff.
>
> Nik
>
Thanks Nik.
> Anno domini 2021 Thu, 4 Mar 10:33:12 -0500
>
> Gene Heskett scripsit:
> > Greetings all you OpenSCAD experts;
> >
> > I had no trouble making a ring with this code:
> >
> > h = 5.25 ;
> > r1 = ( 73.6/2.000000 ) ;
> > r2 = ( r1 + 2.6000 ) ;
> > difference() {
> > cylinder( h , r2 , r2 , $fn = 180 , center = true ) ;
> > cylinder( h , r1 , r1 , $fn = 180 , center = true ) ;
> > }
> >
> > But how do I generate another 2.5mm radius cylinder but only for the
> > stated degrees, like a half cylinder?
> >
> > The tut I'm following doesn't seem to address this.
> >
> > Thanks.
> >
> > Cheers, Gene Heskett
Cheers, Gene Heskett
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