Setback fillet corners

Comments

• mahir Member, Developers Posts: 1,079 ✭✭✭✭✭

  March 2018

  It's not a great approximation, but here's a klugey version using a thickened Fill surface. You can get asymmetric setbacks using tangent splines instead of fillets.
  
  https://cad.onshape.com/documents/57acdfaae4b005c413ed9b6f/w/3fd585a46d3af1b3ba413c53/e/36ee196d49bb6177586cd6ae
  
  

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• Ben_ OS Professional, Mentor, Developers Posts: 281 PRO

  March 2018

  I am looking for something more like this, where the edges are filleted as well. This is from a SaladWorks import of a model I could not make in Onshape
  
  

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• mahir Member, Developers Posts: 1,079 ✭✭✭✭✭

  March 2018

  This is waaaaay overly complicated, but maybe the method can be adapted to your purposes.
  https://cad.onshape.com/documents/57acdfaae4b005c413ed9b6f/w/3fd585a46d3af1b3ba413c53/e/36ee196d49bb6177586cd6ae
  
  

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• mahir Member, Developers Posts: 1,079 ✭✭✭✭✭

  March 2018

  Slightly less complicated and more robust. This method uses the built-in fillet feature on the edges, which allows for conic or curvature based fillets.
  
  

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• owen_sparks Member, Developers Posts: 2,660 PRO

  March 2018

  Ben_ said:

  This is from a SaladWorks import of a model...
  

  Sorry for butting in but I've got to ask; does their version of @cody_armstrong start all his webinars with "Lettuce begin"?
  
  O.S.
  

  Business Systems and Configuration Controller
  HWM-Water Ltd
  

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• MBartlett21 Member, OS Professional, Developers Posts: 1,945 EDU

  March 2018 edited March 2018

  owen_sparks said:

  Ben_ said:

  This is from a SaladWorks import of a model...
  

  Sorry for butting in but I've got to ask; does their version of @cody_armstrong start all his webinars with "Lettuce begin"?
  
  O.S.
  

  @owen_sparks
  
  No, i don't think so.
  
  

  MB - I make FeatureScripts: View FeatureScripts

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• Ben_ OS Professional, Mentor, Developers Posts: 281 PRO

  March 2018

  mahir said:

  This is waaaaay overly complicated, but maybe the method can be adapted to your purposes.
  https://cad.onshape.com/documents/57acdfaae4b005c413ed9b6f/w/3fd585a46d3af1b3ba413c53/e/36ee196d49bb6177586cd6ae
  
  

  NICE! Thank you!

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• antoine_richermoz Member Posts: 11 ✭

  April 2018 edited April 2018

  Hi, I also think that setback fillet are really cool !
  I was inspired by your posts and I've created a FeatureScript to make setback fillet more easily.
  It's not really working at the moment but it's a start.
  
  https://cad.onshape.com/documents/f485cc30540487626b6edd97/w/17f3dfcf7c0c7ed4f1968990/e/0a2b519de9b570367e0e2d62

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• antoine_richermoz Member Posts: 11 ✭

  April 2018

  Ok guys I've done it !
  
  https://cad.onshape.com/documents/f485cc30540487626b6edd97/w/17f3dfcf7c0c7ed4f1968990/e/4ee9436e4068adbe15f4ced4
  
  It takes ages but it works !

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• MBartlett21 Member, OS Professional, Developers Posts: 1,945 EDU

  April 2018

  
  

  @antoine_richermoz
  That is a really cool FS
  
  

  MB - I make FeatureScripts: View FeatureScripts

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• mahir Member, Developers Posts: 1,079 ✭✭✭✭✭

  April 2018

  I agree. Pretty cool. I noticed though that it only works for cubic corners? Maybe you can build in some more flexibility into future iterations. 

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• MBartlett21 Member, OS Professional, Developers Posts: 1,945 EDU

  April 2018 edited April 2018

  antoine_richermoz said:

  Ok guys I've done it !
  
  https://cad.onshape.com/documents/f485cc30540487626b6edd97/w/17f3dfcf7c0c7ed4f1968990/e/4ee9436e4068adbe15f4ced4
  
  It takes ages but it works !

  @antoine_richermoz
  
  It should probably be using GeometricContinuity.G1 instead of GeometricContinuity.G2
  GeometricContinuity.G1 is tangent, which is what mahir used
  
  Fixed document here: https://cad.onshape.com/documents/904601e58ce93805af2393bd
  
  

  MB - I make FeatureScripts: View FeatureScripts

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• MBartlett21 Member, OS Professional, Developers Posts: 1,945 EDU

  April 2018

  @mahir
  Currently it only supports faces with 90-degree edges :-(

  MB - I make FeatureScripts: View FeatureScripts

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• antoine_richermoz Member Posts: 11 ✭

  April 2018

  mbartlett21 said:

  @mahir
  Currently it only supports faces with 90-degree edges :-(
  

   True, but this shouldn't be too hard to fix

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• antoine_richermoz Member Posts: 11 ✭

  April 2018

  mbartlett21 said:

  antoine_richermoz said:

  Ok guys I've done it !
  
  https://cad.onshape.com/documents/f485cc30540487626b6edd97/w/17f3dfcf7c0c7ed4f1968990/e/4ee9436e4068adbe15f4ced4
  
  It takes ages but it works !

  @antoine_richermoz
  
  It should probably be using GeometricContinuity.G1 instead of GeometricContinuity.G2
  GeometricContinuity.G1 is tangent, which is what mahir used
  
  Fixed document here: https://cad.onshape.com/documents/904601e58ce93805af2393bd
  
  

  This is really easy to change, you can also add a option in the feature dialog

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• mahir Member, Developers Posts: 1,079 ✭✭✭✭✭

  April 2018 edited April 2018

  Here's a slightly different approach that doesn't require right angles and uses a setback distance instead of a setback radius. It uses about a dozen features, so if I have time (or someone else), this should definitely be featurescripted.
  https://cad.onshape.com/documents/57acdfaae4b005c413ed9b6f/w/3fd585a46d3af1b3ba413c53/e/36ee196d49bb6177586cd6ae
  
  

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• MBartlett21 Member, OS Professional, Developers Posts: 1,945 EDU

  April 2018

  @antoine_richermoz
  
  You might also want to restrict selecting of planar faces and fillets that are not at corners.
  You could update your filter to be:
  

  EntityType.FACE && !GeometryType.PLANE && !GeometryType.CYLINDER && !GeometryType.EXTRUDED

  
  

  MB - I make FeatureScripts: View FeatureScripts

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• antoine_richermoz Member Posts: 11 ✭

  April 2018

  @mahir I don't really see the difference ?

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• antoine_richermoz Member Posts: 11 ✭

  April 2018

  Good idea @mbartlett21
  

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• mahir Member, Developers Posts: 1,079 ✭✭✭✭✭

  April 2018

  @antoine_richermoz
  The end result is mostly the same, but the updated method is more flexible and can be applied to non-cubic corners because it doesn't require a circular pattern. I'm actually almost done with a featurescript version.
  
  @mbartlett21
  Instead of 
  

  !GeometryType.PLANE && !GeometryType.CYLINDER && !GeometryType.EXTRUDED

  it's easier to just specify
  

  GeometryType.SPHERE

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• MBartlett21 Member, OS Professional, Developers Posts: 1,945 EDU

  April 2018

  @mahir
  
  But if you had two fillets of radius 2mm and one fillet of radius 1mm coming together at a corner, you wouldn't be able to do it.
  You also wouldn't be able to do it with conic or curvature fillets

  MB - I make FeatureScripts: View FeatureScripts

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• mahir Member, Developers Posts: 1,079 ✭✭✭✭✭

  April 2018

  @mbartlett21
  I'm just ignoring that case for now. If you look, joining fillets of different radii isn't pretty at the moment (see below). And dealing with a setback fillet that involves selecting more than just one corner surface seems a bit above and beyond for what is normally just a simple single-radius feature.
  
  
  

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• mahir Member, Developers Posts: 1,079 ✭✭✭✭✭

  April 2018

  And voila, the finished FS! Not to steal your thunder, @antoine_richermoz, but I thought it was important to make the setback distance editable and add support for non-90deg corners.
  
  https://cad.onshape.com/documents/833dffabd805010ce935bee2/w/d15b586cc7aa564eee76cc28/e/45bbda3a08e8edd18c192163
  

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• antoine_richermoz Member Posts: 11 ✭

  April 2018 edited April 2018

  Great work @mahir your script is much cleaner than mine !
  It still pretty slow, but I think it will be as long as we use the fill feature

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• mahir Member, Developers Posts: 1,079 ✭✭✭✭✭

  April 2018

  Thanks @antoine_richermoz. Yeah, it takes about 300-400ms per corner ¯\_(ツ)_/¯, even with just G1 continuity. But thankfully OS is pretty good about caching geometry. So if you’re not changing parameters too often it won’t come into play so much. 

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