Trim questions

[rogersthomas1987]

I am trying to use the trim feature and I can't seem to make it work.  I have a square and a circle sketched on the same plane and they are partially overlapped, I can select the trim function, but it just doesn't do anything.  Nothing gets highlighted and when I try clicking on the part of the circle I want gone it just selects the circle.  What am I doing wrong?  I have watched every video I can find on this but none offer a solution.

[leowarren34]

Hi @rogersthomas1987,

Are the Circle and Rectangle in the same sketch?

Can you upload a screenshot?

[laughingcreek]

need to see what your doing (a screen cast would be good), but your probably using the wrong tool for the situation

[rogersthomas1987]

The circle and square are two separate sketches,  Im not sure what you mean by are they in the same sketch?

[laughingcreek]

sketch trim tool works on sketch objects in the same sketch.

[leowarren34 · Accepted solution]

@rogersthomas1987  Trim only works on sketch features in the same sketch, a sketch being a set of features (shapes) used to make other features such as surfaces, extrudes and revolves.

To get the trim to work you need to start a sketch, draw a circle, draw a rectangle then use trim.

So you should get this:

[rogersthomas1987]

I was pressing finish sketch too early.  You sir are a gentleman and a scholar.

[feman43]

Ok, this is good to know and I'm having the same trouble. In a model I have all of a sudden I cannot trim certain elements. In particular circles. I have turned something on or off in my settings. If I do this test above in my current model I cannot trim the circle in any of the sketches. If I create a rectangle and circle as above I also cannot trim the line segment within the circle but I can trim the segment outside. If I open a new model I can trim normally.,. Strange gremlin I have. It has happened to me in other models as well. Seems like is  shows up after the model becomes more complicated. 

[TrippyLighting]

PLease share your model. Export as .f3d and attach to the next post.

[TheCADWhisperer]

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@feman43 wrote:

Ok, this is good to know...

Strange gremlin I have. 

Seems like is  shows up after the model becomes more complicated. 

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@feman43 

I'll wager that there is a perfectly logical explanation for the behavior that you observe.

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply and end all doubt?

[feman43]

The specific component I'm working to edit are he upper and lower mounts. My usual drafting procedure is to crate a circle, pull lines from either another feature or the circle and then trim what I don't want away. I can do this using the ARC function but that is slightly more difficult. My suspicion is that along the way, I'm not an expert, I have done an edit or something that caused this. It could be that, at some point, I rolled back my history on a component and deleted that work which contributed to my troubles. As you see it is a fairly complex mechanism and it has to mount in another model. It is not yet placed in to that model so I am working two different aspects of the project separately.

Thanks in advance for any good insights  

[TheCADWhisperer]

@feman43 

Are there any unresolved issues highlighted in yellow in your Timeline?

Is the very first sketch in you design (the foundation of the design) fully defined?

I recommend that you start over from scratch and STOP after each and every sketch or feature and Attach here for diagnosis.

[feman43]

I am positive there is a perfectly logical explanation, it's based upon the meat servo connected to the mouse... 😉

[TheCADWhisperer]

@feman43 

We can get this all figured out and have robust and entirely predictable designs moving forward if  you are willing to start over.

One thing we will never see again - is this...

[feman43]

There are.  Sketch plane is missing. Face missing, Project source is lost. Most likely from backing up in the model for redesign of the component features. This mechanism is almost completed and spending a bunch of time repairing the model isn't time cost effective. But I need to understand what I did in order to learn and not do it again. A  few times, I attempted to edit extrusions or added a feature to one and that has caused me to create some additional lines and such. One thing I think may be causal is that I have been consistently trying to use one sketch to create several different features by selecting different profiles for different extrusions. This may have caused an issue if I edited one of the sketches and corrupted an extrusion in the process. 

[TheCADWhisperer]

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@feman43 wrote:

... spending a bunch of time repairing the model isn't time cost effective. 

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@feman43 

Common misconception.

[feman43]

Oh yeah, That is a left over artifact from a design modification to a larger drive pin. I am in a steep learning curve and a complete redo of this model is in order. I have some reluctance to do a complete reboot as this part is nearly ready for installation. I simply needed to resize the mounting tabs. So, what is the best way to proceed?

[feman43]

Yes, I agree. A redo correctly will be an investment to reduce future frustration. I'm in.

[TheCADWhisperer]

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@feman43 wrote:
... part is nearly ready for installation. 

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This isn't going to work (no realistic clearance) and is more expensive than needed (and not even aesthetically pleasing).

[TheCADWhisperer]

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@feman43 wrote:

Yes, I agree. A redo correctly will be an investment to reduce future frustration. I'm in.

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You have caught me at a bad time.

Normally I would show you how I would do the entire design completely from scratch using robust techniques that would transfer to all future projects.  Then entire redesign would take about 2 hrs.  Unfortunately I have deadline on another project that I need to complete.