Please Advise: Getting rid of extra material at the edges of a part after creating a pattern.

alex_westerfield

I've been stumped on this for hours:
I'm attempting to remove all the extra material at the bottom of the part, which is very obvious upon viewing. I've looked up tons of tutorials on the Trim tool, but seem to be doing something wrong in my parameter selections. Has anyone run into this issue? I'm beginning to think my construction was wrong, but I'm quite new to using CAD and my methodology for creating the pattern was.... inefficient to say the least (as is evident by the 6 different "Transform"s).

https://cad.onshape.com/documents/8eb9e505b50aed5a19aee819/w/81967a191c66a56a7657d0ad/e/e66435c3813bf154294b1ed9?renderMode=0&uiState=650151339e049f4dd0c04127


Much obliged to any eyes on this that can give some pointers (both on the trimming and how to be more efficient with the pattern creation). Have a nice day

wayne_sauder

@alex_westerfield
There are many ways to do this including using some feature-script features that users have posted on the forum. However, if you wish to do it with the standard tools and wish to end up with many parts this is one option.
 https://cad.onshape.com/documents/3087d724306a94b15a092364/w/e7fc33eba6ac08c48f4acacc/e/1025935c83a7ea0669575ee8

S1mon

You might try the Grid Extrude feature or the Texture feature. I'm pretty sure you could achieve the pattern you want in a single step.

wayne_sauder

@alex_westerfield
I put a few more ways of doing it in the document. Parts studio copy 3 is probably the best. 

eric_pesty

Agreed with @S1mon, suggestion but if you want to stick to the "built in" tools, here's a simpler way:

https://cad.onshape.com/documents/ed761040fbf6cd42cf4248e1/w/ff8bd69b45793c467c4bab00/e/cdefd0beca88560e28193aab

EvanReese

This is a great use-case for my Grid Extrude feature! You can get your whole pyramid pattern made, trimmed, and merged in a single feature. Here's an example of how to use it on your part, and here's a video tour of the whole feature (it's been modified and improved since then too).

Dean_Gardner

you could perhaps sweep a solid male chamfer around the perimeter and subtract it afterwards..? 

alex_westerfield

Most excellent suggestions! Thank you all immensely.