Best way to go about designing attachment for sg90 servo?

louis_schoeppach

Hi, 
I wanted to design my own little arm that would mesh perfectly with the tiny plastic gear of an SG90 servo. I got a complete model of it off of the internet, but I couldn't select an area around the gear, so I decided to make my own sketch that perfectly matched the gear profile using a few lines and a circular pattern. But I still couldn't select the area around that sketch for an extrude, because I did the outline of the gear by hand, so it didn't line up perfectly with itself and form a "closed" sketch. So I'm wondering if someone who's more experienced knows of a tool or resource that would make this a simple task.

Thanks!

Edit: Link to doc: https://cad.onshape.com/documents/38ff6556b67945ffe0fb5e11/w/102f61611d6afd0f62f2b9d1/e/02a246b499a80c6cca4c74a7 

tim_hess427

If you can make your document public and share it it'll be a lot easier to diagnose the issue. 

Also, take a look at the learning center - there are a lot of great introductory videos, even for people new to CAD in general. 

louis_schoeppach

Oh whoops I totally thought I linked it, edited the post so it has a link and also made sure the doc is public. 

John_P_Desilets

@louis_schoeppach Here is a quick example. Please share with us the arm you end up making! 


https://cad.onshape.com/documents/06b2d0328feabb6a9539425c/w/1bceba6a50d1585c76a08790/e/05aa1a2cf79985ba4f58e866

louis_schoeppach

Thank you man, this is so cool, I didn't know you could use the Boolean tool like that, that's incredibly useful. I'll definitely post what I've made when I'm done