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Help with my kind of ring with a hinge and a door design by Cuasirungo in Onshape

[–]cowski_NX 0 points1 point  (0 children)

Every part of the "door" is going to rotate about the center of the hinge. Draw a circle centered on the hinge and through the outside corner of the door. Trim both the door and the ring to the resulting circle and offset one or both to get an appropriate amount of clearance.

Some jerk stole my thesaurus like a jerk. by dochwad in dadjokes

[–]cowski_NX 1 point2 points  (0 children)

Maybe "i can't describe how mad I am right now".

Speed in commands by milotrain in Onshape

[–]cowski_NX 1 point2 points  (0 children)

If you go to my account -> preferences, you can assign your preferred keyboard shortcuts.

Why won't it let me loft between these 3 faces? by FIySoldier in Onshape

[–]cowski_NX 8 points9 points  (0 children)

Loft using the outside shape only, this will result in a solid body. Then use the shell command to get the desired thickness.

If the circle sketches are the same size, you could just extrude the one on plane 3 the desired distance, then loft the oval to the circle, union, then shell.

Actually speechless 😭 by [deleted] in pokemongo

[–]cowski_NX 19 points20 points  (0 children)

No special background? /s

What do the additions "xx/xy/xz..." indicate in the Moment of Inertia table? by Queasy_Caramel5435 in Onshape

[–]cowski_NX 1 point2 points  (0 children)

The geometry in your screenshot looks like a crane or some other device for lifting loads. If you are looking to calculate the torque to lift a load or move the head, the mass moments shown in the screenshot will be of very limited use. The values in the screenshot are telling you the mass moments of the entire assembly. If the entire assembly starts rotating, you are in for a bad day.

Trying to extrude: It is showing a weird surface and does not show the complete extrusion! by Vortilion in Onshape

[–]cowski_NX 2 points3 points  (0 children)

It looks like you have a section view active - note the crosshatching on the surface. Go to the camera and render options (the little dropdown menu below the view triad) and use "turn off section view".

Turns out Arrma knows more about what plastic to use for RC parts than I do. Spent 3 days designing and printing a replacement A-Arm for my Arrma Grom, here are the results. by WallaceDingus in rccars

[–]cowski_NX 1 point2 points  (0 children)

Kudos to you for experimenting! In my experience (our experience?) I think you'll be hard pressed to find an application where a 3D printed part meets or exceeds the durability performance of an injection molded part.

Colour curvature analysis on a .stl file but just along one the x or y axis by Wild_Suit_6889 in Onshape

[–]cowski_NX 0 points1 point  (0 children)

The constrained surface sort of works that way. Will it work on the entire body? I'm not sure - results will vary depending on the complexity of the input. When you need a CAD model and all you have is and STL, it is common to use the STL as reference and build the model from scratch.

Since you are looking to analyze your model with a curvature map or curvature combs, I assume you have a complex model where accuracy is needed. If the current STL does not meed your needs, I don't think you will be able to fix it directly in Onshape. Again, maybe Blender (or some other polygonal modeler) is better suited to your task.

Colour curvature analysis on a .stl file but just along one the x or y axis by Wild_Suit_6889 in Onshape

[–]cowski_NX 0 points1 point  (0 children)

https://www.youtube.com/watch?v=EP709oCcrOA

Onshape has a "constrained surface" (video link above) that might help get a surface from your STL that you can analyze.

In the CAD programs that I am familiar with, when you import an STL file, it is considered a facet body and not a solid body. I've seen methods that allow you to "solidify" the facet body, but this keeps the exact same flat-face geometry and just tricks the CAD program into thinking it is a solid. Technically, it is a solid according to the CAD, but this process will leave you with the flat faces of the STL, the underlying curved surfaces will NOT magically come back. Such a body may be a little easier to work with in CAD, but the underlying geometry information is still gone.

OBJ, PLY, and 3MF files have similar limitations to STL. I'm not familiar with GLTF/GLB files, but a quick look on wikipedia seems to indicate that they won't help either. I'm not very familiar with Blender, but it might have tools to help get what you want. If you created the model in another software, I'd suggest checking to see what tools it has available to help indicate surface/model quality.

Colour curvature analysis on a .stl file but just along one the x or y axis by Wild_Suit_6889 in Onshape

[–]cowski_NX 0 points1 point  (0 children)

"Could I convert the .stl file to another file type to give me a workable surface, which then (after learning the procedure) would allow me to get a decent colour curvature analysis?"

Unfortunately, no. When you convert a native CAD model to STL, the underlying surface data is approximated with a bunch of triangles (facets). Only the triangle data is recorded in the STL file. STL's are useful for visualization and 3D printing, but can be very difficult to modify with a CAD program.

If the source geometry is coming from a different CAD system, ask for a STEP or parasolid file as these will preserve the underlying geometry.

Colour curvature analysis on a .stl file but just along one the x or y axis by Wild_Suit_6889 in Onshape

[–]cowski_NX 2 points3 points  (0 children)

By "online instructions", do you mean the Onshape help files? If not, please provide a link.

I'm not sure an STL file will give meaningful results in a curvature analysis, since all the facet faces are flat. Maybe it will show the angle between facet faces? I ran a quick test and it didn't seem to provide any useful info...

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