Sweep on two different planes

[andrecasselbergs]

Good day folks. I’m a hobbiest using Fusion 360 to make kids toys/games for my grandkids.

 I’m trying to create a “ramp” into which a marble enters on a down slope, goes around a 90 degree turn then continues down an exit slope in the opposite direction. I’ve tried to set up two opposite planes using the “two lines” command and creating a sweep from each end to meet in the middle but without success. I’m sure there must be an easier way.

Sorry, can’t offer a model as I haven’t been able to get one to work well enough. I would be really pleased to get a solution. Sorry, just for clarity, some of my components including this one, are 3D-printed.

[davebYYPCU]

What should happen - we know.

What does happen with your data - we need the file for review.

Might help....

[andrecasselbergs]

Thanks for telling me how . . .

Here's the file that I'm trying to make work.

[andrecasselbergs]

I have now downloaded your example and understand how you did that but the problem is, if you visualize a marble running into the ramp, it will run down leg 1 and, if tilted to one side, will run down leg 2 but then leg 3 is uphill and the marble stops.

Does this make sense? I need Leg 3 to also be downhill. See how I've oriented the model in the amended file attached for reference.

[davebYYPCU · Accepted solution]

Path sketch - common mistake - fillets were just slightly too big.

Delete the small short line, make the two end points that are left, co-incident, and then add tangent constraint.

Because all is unconstrained (blue, orange and white articles)- anything can happen, but worked for me.

Still have to build the Sweep path by clicking on the next segment.

Might help....

[davebYYPCU]

Nope, closer inspection will show that there are 2 horizontal straights, operating on the first question.  

We have water under the bridge now and a 2d / 3d path (or sheet metal unfold) is all you need, and your sketch 1 path was where the error is.

Might help....

[andrecasselbergs]

Interestingly, when I applied the tangent command to the join, the model flattened out. I went back, deleted the tangent command, redid the sweep and voila, success.

Ill try and embed this into my model.

Thanks and awful lot, been messing about with this for days . . . .

[andrecasselbergs]

Hey Guys, I want to thank you all very much, this has been a great learning curve for me, you've all been a great help.

I've attached a file of the result I got. In the process I couldn't get the drawing for the path right so I made two components. Then I "combined" them and finally moved the sweep to the end of the the timeline and changed it from a "new body" to a "cut". Then I deleted the "combine" which became irrelevant, in hindsight it may not have been required.

There may be quicker ways to do this but I'm really pleased with the result and I'm really happy with my new expanded knowledge. What a great place to learn from folks who know their stuff.

[davebYYPCU]

Version 3 - I can't add the tangent constraint any more.

Chasing your tail?  This example is showing why I prefer 2d sketches, your arc/s look ok, until you take a closer look.

Those white dots are the arc centre points, which don't align to anything, and the 3d tangent constraint is unavailable.  Means you get a bump / seam at the halfway point of the curve/s, considering both radii are now 38mm, why not a semi circle? 

(Earlier statement, coming from both ends work around, has come into play here?)

I have noted this is a demo version, I would presume this sketch elevation

(looking slightly tilted right view and lining up both path end points as best I could)

would have been flat (stated intent constant fall - closer to view arc is the bottom one).

Might help....

[laughingcreek]

word of caution, using and relying on position captures like you have here will eventually bite you in the booty as you progress to more involved models.  you don't want any position captures in your time line.

also, while you do generally only want one body in a component when your done with it, you can have multiple bodies for the purpose of construction that get removed at the end.  having a separate component for the pipe just muddies up the time line and your browser.

[davebYYPCU]

Now that we know what you actually wanted.

Fully define simple sketches on centre.  One part one component.

Edit, Actually I had a fiddle....

Might help....