topic Betreff: [Help] Sketching a bottle neck>keep getting sharp joins in Fusion Design, Validate & Document Forum

[Help] Sketching a bottle neck>keep getting sharp joins

sentur — Thu, 28 Apr 2022 08:36:38 GMT

I’m struggling to sketch / model the neck of a bottle without getting any shape joins at a connection point. I.e. at the point where the straight neck flows into the curved shoulders. Or where the two areas of the curved neck join one another.

I’ve tried to use the line tool and then 3 point arcs to create the curved shoulders (this caused a sharp join in the middle of the two arcs). I’ve tried to use the spline tool but this causes a sharp join as the shoulders join the straight line of the neck (This is what’s shown below).

I've shown images of the Fusion360 sketch, the area where the points connect with a sharp join (i.e. not a seamless continuous line flowing into a straight neck line). There's also the original CAD reference drawing for the bottle.

How would you go about replicating the reference drawing? I'm still quite new to Fusion 360 so learning as a I go. The original CAD drawing can be found here.

Betreff: [Help] Sketching a bottle neck>keep getting sharp joins

g-andresen — Thu, 28 Apr 2022 09:03:16 GMT

Hi,

please share your f3d file

günther

Betreff: [Help] Sketching a bottle neck>keep getting sharp joins

sentur — Thu, 28 Apr 2022 09:19:48 GMT

Of course. Here's the file.

Betreff: [Help] Sketching a bottle neck>keep getting sharp joins

davebYYPCU — Thu, 28 Apr 2022 09:55:37 GMT

You don't have any tangent constraints at the top,

I see you used them lower down.

Might help....

Betreff: [Help] Sketching a bottle neck>keep getting sharp joins

g-andresen — Thu, 28 Apr 2022 10:34:25 GMT

Hi,

1. watch screencast

2. Sometimes it helps to fix (green) the sketch, remove the critical areas and reinsert and edit.

Günther

Re: [Help] Sketching a bottle neck>keep getting sharp joins

dsouzasujay — Thu, 28 Apr 2022 11:56:28 GMT

Hi @sentur

Created the design from scratch, attached for reference

Re: [Help] Sketching a bottle neck>keep getting sharp joins

sentur — Thu, 28 Apr 2022 11:48:50 GMT

Thank you @g-andresen That really help to explain what's going wrong and how to fix it. Much much appreciated.