This isn't letting me fillet this .5 inches

carlos_frias469

I have been having trouble trying to fillet this object in the project. It keeps saying that it failed to generate properly but it only lets me fillet from .3,.2,.1, and anything in between those measurements up to 3.9. I fillet in other project and it doesn't have any errors. here are some pictures. the one below this one is  I could extrude 5 inches

mahir

Hi Carlos. Welcome to the forum. First, check the Forum Post Checklist for how to maximize your chances of answering your question. Second, I can't be sure what I'm looking at without a link to your model, but in this case I think the fillet is likely geometrically impossible, and that's why you're getting an error. The first picture works because you're filleting 2 simple 90deg corners. The second picture includes some sharp edges and a small radius. You can't add a radius any larger than the one that is already there. Hope that helps.

mahir

Hi Carlos. Welcome to the forum. First, check the Forum Post Checklist for how to maximize your chances of answering your question. Second, I can't be sure what I'm looking at without a link to your model, but in this case I think the fillet is likely geometrically impossible, and that's why you're getting an error. The first picture works because you're filleting 2 simple 90deg corners. The second picture includes some sharp edges and a small radius. You can't add a radius any larger than the one that is already there. Hope that helps.

carlos_frias469

It helped but I have specific measurements that I need to follow for the radius for that part it is supposed to be. But I was washing a tutorial on Inventor so that might be the difference. But I shared my documenthttps://cad.onshape.com/documents/64deaeba0f6480aae84d93af/w/d9c545a3f64fc43ceb012c98/e/3a70aa50db65d6509c8d9628

NeilCooke

@carlos_frias469 - what is the URL? Also, did you make it public?

carlos_frias469

no I haven't

carlos_frias469

Shared it with onshape support

NeilCooke

Setting that radius to 0.5in would completely consume that face - what is the real-world purpose of this part?

BTW for non-paid subscriptions, the forum is the correct place to get support.

carlos_frias469

Okay no I meant that I wan't to fillet this .5 inches not putting the radius .5 inches on this

mahir

I don't have Copy permissions, but from what I can see and measure the problem is in your first sketch. You have 3 arcs, and none of them are tangent. I've circled what looks like non-tangent connections between the arcs. Also, your smallest arc has a radius of .4in. These issues limit how large a fillet you can add.


I recreated a similar shape, and the largest feasible fillet was only .35.


Making the arcs tangent helped a bit and allowed me increase the fillet to .48 (almost .5). So bottom line, make sure your base sketch is correct.

NeilCooke

That's what I meant - you can add a fillet of 4.7in but no bigger

EDIT: and yes I fixed the sketch tangent issue first

carlos_frias469

Ive tried Mahir but its not letting me make the fillet to even .48 only .35

carlos_frias469

nobody? okay my problem isn't solved

NeilCooke

What should it look like? Can you show us the Inventor tutorial? What is the purpose of this part? What problem are you trying to solve?

mahir

If nothing else, your sketch is not fully constrained. And without a constrained sketch, your geometry isn't locked down, which will yield indeterminate results when adding a fillet that depends on that geometry.

 Like Neil was saying, without seeing the tutorial I can't tell what you're trying to accomplish.

carlos_frias469

The tutorial is this https://www.youtube.com/watch?v=Cxtre28-hQ0

carlos_frias469

  

NeilCooke

So if you watch the video carefully (I spent about 3 seconds looking at it) he selects the edge, not the face like you did - do the same and you'll get the same result.

mahir

NeilCooke said:

So if you watch the video carefully (I spent about 3 seconds looking at it) he selects the edge, not the face like you did - do the same and you'll get the same result.

@NeilCooke, good on you for having the patience to sit and watch that I had a feeling face selection had something to do with it. In 2 decades of modeling, I can probably count on my hands the number times I've filleted a face instead of specific edges (barring 2 and 3-surface face fillets).