How do I do mate connection for 90deg gear in assembler

RyanAvery

How do I do the mate connector for this? I have 2x 45degree angled gears and I want them to rotate eachother. 
Anyone know how to make this gear relationship? When I try the mate connectors it doesn't line up perfectly. 

owen_sparks

So sorry, been at work for 11hours so far am a bit fried, please give it another go.

owen_sparks

Sure thing

Owen S.

brucebartlett

Use 2 revolute mates to get the rotation in the directions as shown. Then link them with the gear mate at the desired ratio. Gear mate is really just a way to link the existing revolute mates via a ratio and rotation direction. 

RyanAvery

When I do that the gears move to be end to end as if it is one large gear instead of 2, one on top of the other. 

owen_sparks

If you post a link to your document I'm sure somebody will sort it out for you 

philip_thomas

owen_sparks

^^^^^

RyanAvery

https://cad.onshape.com/documents/cb0d31c8ba2be4f0f4f7a473/w/89e55966149663d6912f825e/e/71ccc386bbc72853442b0106

I would like to have the gears be at right angles to each other. The gears are twisted at 45 degrees so I think it should work. 
I'm comp sci not engineering so I'm not sure how it all works at the moment. 

RyanAvery

I'd like to know how to do it not just have it done for me though! 

owen_sparks

Working on it...

owen_sparks

OK.

First stab at it here.

Take3
https://cad.onshape.com/documents/93f5d20d6703cafeda99e0cf/w/51f8bd2bf7a63edbef6033ad/e/fbc877d30a05748467e19fea  

As for the knowing how to do it that's the great thing about parametric cad, you can use the roll back bar in the part studio to step through what was done.

We need to treat each part individually and then make them move together.

Steps.

(1) To make the handle or shaft spin we use revolute mates.  They need something to mate to so I've made a rudimentary base but anything will do.

(2) Once we have the base I've put mate connectors in appropriate places (all still in the part studio.)

(3) Then we go to the assembly and make the revolutes.

(4) Once they work OK we add a gear relation between them.

If we look at the assembly in cross-section we can see they don't quite mesh.  This can be fixed with by rotating one of the mates to suit back in the part studio:-


I've left that step, and mating the secondary shaft for you 


Hope that helps, if not please shout.

Cheers,
Owen S.

RyanAvery

I get this message when I click your link:
Failed to load document for workspace. Resource does not exist, or you do not have permission to access it.

owen_sparks

That's because I'm an idiot.  Hang on a minute.

Owen S.

owen_sparks

Document is erm, ah, public now

Please try it again.

Ta,

Owen S.

RyanAvery

Link doesn't work now 

RyanAvery

Thanks for the help though 

owen_sparks

So sorry, been at work for 11hours so far am a bit fried, please give it another go.

RyanAvery

Works great, thanks a lot! I will try to understand how you did it now. 
Thanks for the help

owen_sparks

Sure thing

Owen S.

3dcad

owen_sparks said:

So sorry, been at work for 11hours so far am a bit fried, please give it another go.

Dude, that's less than half a day..

owen_sparks

You're not wrong, but I'm not self employed...

...also there's no food here!

Owen S.

philip_thomas

Rami - I have seen Owens desk - also there's no food and the coffee sucks!

owen_sparks

If there are no photographs it never happened, but he's right about the coffee, I wouldn't even insult an American resident by offering it to them!

O.S.

owen_sparks

We're good at sheep though, and more importantly beer.

3dcad

So you wen't home to have a beer and kebab - that is acceptable if you hang in Onshape forums at least few more hours to call it a day.