Can't subtract on certain parts

zach_morris

I designed this cap for a repair I'm making, but I'm unable to subtract 4 of my 6 screw holes to bring the height down. It seems that the only differences is that the two that worked are adjoined to 2 walls as opposed to just 1. I've already spent way too long getting it to this point, but I figure it's just one of those things that someone could point out super quick. I appreciate any help!

https://cad.onshape.com/documents/4aae0cd50e6cef7caf64ce3c/w/4928d5fc75b044f54c0212c3/e/ee75c0f375d993ecff2f09ce

eric_pesty

Not sure exactly what the issue is, I'm guessing you wanted to add some more faces to "extrude7"?
Unless I am missing something, I think you should be able to use the "second end position" option on extrude4 to bring the top face down where you want it (instead of using a separate extrude).

steve_shubin

@zach_morris

@eric_pesty

Eric is right. That’s all you had to do

In the document I posted up above, go look in Part Studio 3 for Eric‘s solution

Zach, as to why you weren’t able to do it the way you thought it should work, is because most likely, Sketch 1 one was getting in the way of you selecting the faces of the part. And there also had to be a split made to make it work the way you were talking about doing it Zack

But Eric is right. The best way to do it was do a second end position extrusion on Extrusion 4

steve_shubin

@zach_morris

Is this what you are looking for ?

take a look at Part Studio 2

https://cad.onshape.com/documents/542f2153c43896147b4c97ce/w/f18dde24886194c04f0a7ad2/e/1c7518a09973b4d842ca6d61

eric_pesty

Not sure exactly what the issue is, I'm guessing you wanted to add some more faces to "extrude7"?
Unless I am missing something, I think you should be able to use the "second end position" option on extrude4 to bring the top face down where you want it (instead of using a separate extrude).

steve_shubin

@zach_morris

@eric_pesty

Eric is right. That’s all you had to do

In the document I posted up above, go look in Part Studio 3 for Eric‘s solution

Zach, as to why you weren’t able to do it the way you thought it should work, is because most likely, Sketch 1 one was getting in the way of you selecting the faces of the part. And there also had to be a split made to make it work the way you were talking about doing it Zack

But Eric is right. The best way to do it was do a second end position extrusion on Extrusion 4