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What is going on with extrude cutting?

cdautotech
Explorer Explorer
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7 Replies
Message 1 of 8

What is going on with extrude cutting?

cdautotech
Explorer
Explorer

Trying to cut out a feature by selecting a profile and extrude cutting.  I have 2 profiles selected, and im getting way more cuts than profiles selected.  Any help?

Profiles selected

cdautotech_3-1658353362909.png

 

Result I get if I extrude cut

cdautotech_4-1658353403127.png

If i select new body, I just get 2 objects only, but if i select cut i get total 8 cuts.  HELP!

cdautotech_5-1658353539161.png

 

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Accepted solutions (1)
336 Views
7 Replies
Replies (7)
Message 2 of 8

g-andresen
Consultant
Consultant

Hi,

please share the file for investigation

 

günther

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Message 3 of 8

jeff_strater
Community Manager
Community Manager
Accepted solution

almost certainly, this is because you are cutting a component that has multiple instances.  All instance of a component share the same geometry, so the cut in one instance affects all instances. 


Jeff Strater
Engineering Director
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Message 4 of 8

cdautotech
Explorer
Explorer

Here you go

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Message 5 of 8

jhackney1972
Consultant
Consultant

@jeff_strater hit this one on the head without looking!  The Screencast shows you have multiple instances stacked on top of each other.

 

John Hackney, Retired
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Message 6 of 8

cdautotech
Explorer
Explorer

So I select the 2 profiles i want to cut, circled below.1.png

 

I get these extra random cuts

2.png

 

and if i complete the action i get this result?  and thats because i have multiple instances? 


cdautotech_0-1658359652598.png

 

 

rolled my history marker back, deleted those extra instances, re did the cut and same thing.  dont think the multiple instances was the ansser

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Message 7 of 8

jeff_strater
Community Manager
Community Manager

The instances are the reason for what you are seeing.  Component instances share the same geometry, no matter when in the timeline you have made that geometry.  It's just the nature of Components.  The reason why instances share the geometry is for efficiency.  If you have 100 instances of a component,  because they share the geometry, you only need one copy of the geometry, not 100 copies.

 

If you do want to modify just one instance,  you have to break that link.  Copy/Paste of a component creates instances of the component.  Copy/Paste New creates an independent copy.

 


Jeff Strater
Engineering Director
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Message 8 of 8

cdautotech
Explorer
Explorer

Ok that worked.  Thank you

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