When is a solid not a solid?

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Vagulus
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When is a solid not a solid?

Post by Vagulus »

I have modeled a (roughly) triangular solid
210730 To Sweep.png
210730 To Sweep.png (25.38 KiB) Viewed 878 times
and I wish to Sweep a Web around it.
210730 Not Solid.png
210730 Not Solid.png (21.65 KiB) Viewed 878 times
When I do so It is not a solid! :o

SNAFU! My Bad! What have I done wrong?
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210730 AP-00-000.FCStd
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"It is much harder to simplify than to complicate."
Joseph Kimble
GeneFC
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Re: When is a solid not a solid?

Post by GeneFC »

Break the path sketch into two pieces and you can complete the sweep.

You will need to copy the sketch, since splitting the existing sketch will break the idler arm pad.

Loops should be allowed as the sweep path, but it did not seem to work in this case.

Gene
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Vagulus
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Re: When is a solid not a solid?

Post by Vagulus »

GeneFC wrote: Thu Jul 29, 2021 11:35 pm Break the path sketch into two pieces and you can complete the sweep.
You will need to copy the sketch ..
I am afraid I don't know what you are talking about GeneFC.
I Googled freecad copy sketch and got
1. Select sketcher element for copy operation.
2. Click on the Sketcher Copy button in the toolbar or choose Sketch → Sketcher tools → Copy from the Sketch menu.
3. Place copy in the 3D view.

Then I tried to select the path and found
210730 Unconnected.png
210730 Unconnected.png (30.33 KiB) Viewed 847 times
that the lines that make up the path are individual. That means the path is already broken into six pieces.

I'm all confused.

Incidentally, I have done this web trick umpteen times before and never had this problem.
"It is much harder to simplify than to complicate."
Joseph Kimble
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Vagulus
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Re: When is a solid not a solid?

Post by Vagulus »

Vagulus wrote: Fri Jul 30, 2021 12:48 am That means the path is already broken into six pieces.
Got there!
210730 Webbed.png
210730 Webbed.png (6.03 KiB) Viewed 830 times
I selected the Idler Arm Web Sketch and clicked Sweep then added the edges in the Idler Arm Sketch one at a time.

Thanks
"It is much harder to simplify than to complicate."
Joseph Kimble
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Shalmeneser
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Re: When is a solid not a solid?

Post by Shalmeneser »

Vagulus wrote: Fri Jul 30, 2021 1:18 am I selected the Idler Arm Web Sketch and clicked Sweep then added the edges in the Idler Arm Sketch one at a time.
It works, but in my tentative, the pad disappears.

I've redone the AdditivePipe in a new files and it should always work.
I don't understand the problem with your file.
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Perthfectible.FCStd
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210730 AP-00-000 BUG.FCStd
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papyblaise
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Re: When is a solid not a solid?

Post by papyblaise »

I did a lot of retouching, I ended up finding extra points in the 2 sketches, but I looked so hard that I no longer know where
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210730.PNG
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Shalmeneser
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Re: When is a solid not a solid?

Post by Shalmeneser »

You can Pad but not Pipe after.
You can Pipe but not Pad after.
:shock:
So where is the problem ?
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Shalmeneser
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Re: When is a solid not a solid?

Post by Shalmeneser »

I've modified the big round's Idler Arm Web Sketch. :mrgreen:
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210730 AP-00-000 OK.FCStd
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Vagulus
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Re: When is a solid not a solid?

Post by Vagulus »

Shalmeneser wrote: Fri Jul 30, 2021 11:19 am I've modified the big round's Idler Arm Web Sketch. :mrgreen:
This was what I had
210731 Mine.png
210731 Mine.png (7.41 KiB) Viewed 680 times
and this is what you have
210731 Shalmeneser .png
210731 Shalmeneser .png (12.48 KiB) Viewed 680 times
All I can see is the two equality constraints where you specified the 16mm curve diameter to be equal to the construction line curve diameter.
Is that all you did?
Then the Pipe worked okay?
"It is much harder to simplify than to complicate."
Joseph Kimble
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Re: When is a solid not a solid?

Post by domad »

Greetings to the Community!

My general rule for creating sketches:
- reduce the constraints as much as possible;
- prefer geometric constraints to dimensional ones.

Good weekend
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2.png
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210730 AP-00-000.FCStd
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