Deleting an imported stl deletes all of my sketches and extrudes

hedley_phillips

Hi,

I've imported an STL and am aware I can't edit it in Onshape so I have begun to recreate it using my own sketches and extrudes. I now want to delete the original stl import, leaving just my work but as soon as I do this, everything disappears as it seems my sketches are dependants of the imported stl.

The file is: https://cad.onshape.com/documents/a98c67ba3808e2382c3127b4/w/032e756798941e8c816b5a6e/e/65218f1f3c45e80105f40360?renderMode=0&uiState=65e379f914538c0bec80087d

I've tried to work out how to resolve this and searched but no luck so far.

Thanks,

S1mon

https://cad.onshape.com/help/Content/deleteparts.htm

robert_scott_jr_

Hello Hedley. The link provided takes me to the Documents page. - Scotty

martin_kopplow

If you've referenced a sketch plane to the imported STL, then based your model on it, the sketches will break when you delete the referenced STL, and all things created on these sketches will disappear. That is the logic of a history-based model.

hedley_phillips

robert_scott_jr_ said:

Hello Hedley. The link provided takes me to the Documents page. - Scotty

Hi, I think I must have deleted the original sketch. Sorry about that.

hedley_phillips

martin_kopplow said:

If you've referenced a sketch plane to the imported STL, then based your model on it, the sketches will break when you delete the referenced STL, and all things created on these sketches will disappear. That is the logic of a history-based model.

Hi Martin,

That's what I did. What is the work around? Do I not reference the plane?

NeilCooke

There is no need to delete it - either just hide it or use the Delete part feature.

hedley_phillips

NeilCooke said:

There is no need to delete it - either just hide it or use the Delete part feature.

I couldn't hide it, suppress it or do anything without my work disappearing. 

think I need to go and read the docs again to properly get my head around things.

S1mon

https://cad.onshape.com/help/Content/deleteparts.htm

hedley_phillips

I've recreated the issue and worked out that when I deleted or supressed the imported stl, my extrudes disappeared but not my sketches.

Had a play and I found that when I was extruding, I was adding rather creating new. 

Now when I deleted the stl, I don't see all my extrudes disappear. This is great, but going forward when I want to add a new extrude to my previous extrude but not the imported stl. How do I acheive this?

So basically. Import stl. Create a sketch and extrude it using New so it doesn't become part of the stl. But my second extude I want it to be added to the firsdt but not the stl.

Thanks,

nick_papageorge073

When you click on "add" in the extrude window, there is an option to select the part/parts to merge with.