Warnings and Errors made by trimming bits of primitives away?

[Anonymous]

I am attempting to build a plague for my son's Arror of Light. (If you google that in Google Images, you'll see many examples of them) and I wants to make ours without copying another's design with a back drop image, so I used simple trig to create an ARC and 7 15-Deg rays coming off using 20mm circles as the end points with tangent constrained lines. Was quick, and got me exactly the shape I was hoping for. 

So prior to extruding it, I was going to trim off all the unneeded lines, and I started getting the usual warnings that I have trimmed off a bit that was part of a constraint. I have seen this before and usually just ignore it as the outcome is what I needed. This time I also started getting Errors that Fusion was unable to reconcile a few items during my trimming. I now have fragments of circles that should not have any remaining bits that I am not sure why they exists, and i thought.. should I even be using the approach I figured out on my own?? Is there a better way to do what I needed?

I annotated a screen cast of what my result looks like. Would anyone have time to nudge me in the right direction if I am off the rails? Or can I safely ignore the warnings and errors as the end result looks like what I expected? 

[laughingcreek]

I don't see a screen cast

[Anonymous]

Why does the forum tool never actually attach it? <sigh>

https://knowledge.autodesk.com/community/screencast/4c02be05-8e5a-4a0d-8b19-0ce59dc8ef1f

[TrippyLighting · Accepted solution]

Your sketch "should" include arcs and lines only and if it would , it would work, even though that structure you have created is much easier to create with 2 very simple sketches and patterning solids.

However, your sketch includes several split es that I assume you've used instead of arcs.Arcs don't have tangent handles, only splines do.

Also, there really is no need for trimming any of this as you can extrude multiple profiles at once from one sketch in Fusion 360.

Edit: Attached is an example of how this works.

[Anonymous]

Hi Peter,

Oh yes, I suspect what I made could have been done much easier if I was more familiar with Fusion. I am finally at the point where I at least do not violate the first 2 rules, took me a bit to grasp that. 😄 

I was wondering, what if I had used all the circle primatives but made them construction lines? Then pick the lines that are building up my profile and turn them back to non-construction lines?

I probably could use a tutor on this one design, as it's simple enough and I could pick up some solid build tips.

Would you know of a tutorial that might speak best to the geometries I was going for?

All in all, Fusion delivered a great end result, my first milling/ V-Carve looked pretty good coming from a $250 home made CNC machine 😄

Nick

[TrippyLighting]

No, I am not aware of any particular tutorials. My sketches did not use any circle primitives, but the slot tools from the sketch menu.

For this design they come in incredibly handy 😉

[dieselguy65]

i runinto the same thing, after creating sketches, i like to trim off the unneeded parts to clean them up.

in reality, you can just leave those pieces and select the sections. but it sure is nicer to eliminate the extra lines, makes it easier selecting the sketch to extrude/cut

[Anonymous]

Hrmmm.. I missed the bit about using the SLOT tool..

I’ll try it again using that and see if it works for me. Thanks.

I’ll probably fall back to trimming, I can’t help it, it just looks tidy.