translate([0,0,-H/2]) cyl(h=H+Ex,d=6.5);

Hello OpenSCAD, I would like to soften the edges just a bit where the torus intersects with the cylinder. The torus makes a finger grab section so smooth would be nice. Any suggestions? Thank you, Bob Roos // RV cabinet knob // bob roos // december 10, 2022 include <BOSL2/std.scad> include <BOSL2/metric_screws.scad> $fn = 48; D = 22; // outer diameter of knob Di = 17; // inner diameter of torus to make indent Td = 8; // diameter of cross section of torus H = 17; // height of the knob Ex = 2.5; // Threaded part extra difference(){ union(){ cyl(d=D,h=H,rounding2=2,); translate([0,0,-H/2-Ex/2])cyl(d=D,h=Ex); } torus(id=Di,od=Di+Td+15); # translate([0,0,-H/2+Ex]) metric_nut(size=6); translate([0,0,-H/2]) cyl(h=H+Ex,d=6.5); } -- Best regards, Bob mailto:roosbob@wybatap.com

On Sat, 2022-12-10 at 22:25 -0500, Bob Roos wrote: Quick illustration... // RV cabinet knob // bob roos // december 10, 2022 include <BOSL2/std.scad> include <BOSL2/metric_screws.scad> $fn = 48; D = 22; // outer diameter of knob Di = 17; // inner diameter of torus to make indent Td = 8; // diameter of cross section of torus H = 17; // height of the knob Ex = 2.5; // Threaded part extra difference(){ union(){ cyl(d=D,h=H,rounding2=2,); translate([0,0,6.5]) torus(id=17,od=24.5); //(id=20,od=Di+Td+15); translate([0,0,-H/2-Ex/2])cyl(d=D,h=Ex); } torus(id=Di,od=Di+Td+15); translate([0,0,-H/2+Ex]) metric_nut(size=6); translate([0,0,-H/2]) cyl(h=H+Ex,d=6.5); } > Hello OpenSCAD, > > I would like to soften the edges just a bit where the torus > intersects with the cylinder.  The torus makes a finger grab section > so smooth would be nice. > > Any suggestions? > > Thank you,  Bob Roos > >   // RV cabinet knob > // bob roos > // december 10, 2022 > > include <BOSL2/std.scad> > include <BOSL2/metric_screws.scad> > > $fn = 48; > D = 22;       // outer diameter of knob > Di = 17;      // inner diameter of torus to make indent > Td = 8;       // diameter of cross section of torus > H = 17;       // height of the knob > Ex = 2.5;     // Threaded part extra > > difference(){ >     union(){ >         cyl(d=D,h=H,rounding2=2,); >         translate([0,0,-H/2-Ex/2])cyl(d=D,h=Ex); >     } >     torus(id=Di,od=Di+Td+15); >    # translate([0,0,-H/2+Ex]) metric_nut(size=6); >     translate([0,0,-H/2]) cyl(h=H+Ex,d=6.5); > } >

  translate([0,0,4.75])

Hi larry, very cool. I like what it did to the previously plain knob top. There is one small problem because of a constraint I did not mention in my OP. The knob part of a "push lock, push release" catch and has to fit in a recess so the max diameter is D. Playing with the idea of a 2nd torus I used this: translate([0,0,4.75]) # torus(id=17,od=D); //(id=20,od=Di+Td+15); It looks perfect, but it disappears on F6. I didn't understand why until I realized I was differencing it out. I moved it after the difference and it looks great. Now to put something interesting on the plain top Thank you. Saturday, December 10, 2022, 11:19:23 PM, you wrote: > On Sat, 2022-12-10 at 22:25 -0500, Bob Roos wrote: > Quick illustration... > // RV cabinet knob > // bob roos > // december 10, 2022 > include <BOSL2/std.scad> > include <BOSL2/metric_screws.scad> > $fn = 48; > D = 22; // outer diameter of knob > Di = 17; // inner diameter of torus to make indent > Td = 8; // diameter of cross section of torus > H = 17; // height of the knob > Ex = 2.5; // Threaded part extra > difference(){ > union(){ > cyl(d=D,h=H,rounding2=2,); > translate([0,0,6.5]) > torus(id=17,od=24.5); //(id=20,od=Di+Td+15); > translate([0,0,-H/2-Ex/2])cyl(d=D,h=Ex); > } > torus(id=Di,od=Di+Td+15); > translate([0,0,-H/2+Ex]) metric_nut(size=6); > translate([0,0,-H/2]) cyl(h=H+Ex,d=6.5); > } >> Hello OpenSCAD, >> >> I would like to soften the edges just a bit where the torus >> intersects with the cylinder.  The torus makes a finger grab section >> so smooth would be nice. >> >> Any suggestions? >> >> Thank you,  Bob Roos >> >>   // RV cabinet knob >> // bob roos >> // december 10, 2022 >> >> include <BOSL2/std.scad> >> include <BOSL2/metric_screws.scad> >> >> $fn = 48; >> D = 22;       // outer diameter of knob >> Di = 17;      // inner diameter of torus to make indent >> Td = 8;       // diameter of cross section of torus >> H = 17;       // height of the knob >> Ex = 2.5;     // Threaded part extra >> >> difference(){ >>     union(){ >>         cyl(d=D,h=H,rounding2=2,); >>         translate([0,0,-H/2-Ex/2])cyl(d=D,h=Ex); >>     } >>     torus(id=Di,od=Di+Td+15); >>    # translate([0,0,-H/2+Ex]) metric_nut(size=6); >>     translate([0,0,-H/2]) cyl(h=H+Ex,d=6.5); >> } >> > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org -- have Fun, Bob mailto:roosbob@wybatap.com