Which mate i must use for v-slot profile and wheel

merenat_nat

Hi. sorry for my poor English. I will try my best. I have used inventor in the past, but for some time I have not been drawing and I feel a little rusty

I am trying to make the connection between the wheel and the profile but I do not find how. No idea what kind of mate should I use.
I can not even with the help of the animations

https://cad.onshape.com/documents/67cf68820ddc59a6e46e4849/w/7bc68b0e0f4820425ad2697c/e/b2d8d05cd32a7ebc84e38ee5

The idea is to modify this design to change it from T-slot to V-slot and add a couple of improvements.

https://cad.onshape.com/documents/5749f861e4b0e44bdee4b8da/w/259ca1872af61bdfae87c4ff/e/1d11ee337bdf15ca9be5a6f3

Thank you very much for the help.

Edited because the links did not work

daniel_splawski

It's a bit of a pain, but if you stack a parallel mate and two tangent mates it looks like you'll get the result you're after.  

https://cad.onshape.com/documents/335358f1b0caa0cbee6ff6ad/w/00aaf657beb20c73bc8549cf/e/aa52dc014789989d553720e7

owen_sparks

This is a bit of a cheat but allows the wheel to traverse the length of the extrusion, and only requires 1 mate:-

https://cad.onshape.com/documents/55e70171e2086d02cd62679e/w/052ab7b1e0ef1949884a684f/e/197c1644a860344ab4cf093f

Owen S

daniel_splawski

It's a bit of a pain, but if you stack a parallel mate and two tangent mates it looks like you'll get the result you're after.  

https://cad.onshape.com/documents/335358f1b0caa0cbee6ff6ad/w/00aaf657beb20c73bc8549cf/e/aa52dc014789989d553720e7

owen_sparks

This is a bit of a cheat but allows the wheel to traverse the length of the extrusion, and only requires 1 mate:-

https://cad.onshape.com/documents/55e70171e2086d02cd62679e/w/052ab7b1e0ef1949884a684f/e/197c1644a860344ab4cf093f

Owen S

merenat_nat

I'm still a bit confused, but I see the way.

The first option I understand but it was out of my reach yet
and in the second I do not see that it maintains the distance between the wheel and the aluminum.

I will continue investigating after seeing some more video to help clarify me

In both cases the distance between the axes is correct, right?
Thank you both very much.

daniel_splawski

owen_sparks said:

This is a bit of a cheat but allows the wheel to traverse the length of the extrusion, and only requires 1 mate:-

https://cad.onshape.com/documents/55e70171e2086d02cd62679e/w/052ab7b1e0ef1949884a684f/e/197c1644a860344ab4cf093f

Owen S

You had to add the mate connector for the aluminum extrusion correct?  I'm missing how you determined the offset of 20.307mm, but I really like the approach otherwise.  I never realized that you could add mate connectors in a part studio.  What an excellent idea!

owen_sparks

daniel_splawski said: You had to add the mate connector for the aluminum extrusion correct?  I'm missing how you determined the offset of 20.307mm, but I really like the approach otherwise.  I never realized that you could add mate connectors in a part studio.  What an excellent idea!

Hi.  Yes indeed, I'm very much in favour of adding custom explicit mate connectors in studios so they're ready to go once in the assembly.  (i hope in due course we can script the creation assemblies so we import parts with predefined mate points have them assemble themselves into place.)

The offset is one reason I'm underwhelmed with my solution.  (In fact I didn't calculate it I just stole the answer from your assembly!) As it stands mine is not parametric, so if the wheel diameter changes it falls over.  If I was doing it for real I'd probably make use of the measure distance featurescript or at least a variable to set it.  (Depending on whether the wheel lives in the same doc or not there might be a derive or In context edit sketch, to get there.)

Also don't like the fact that the wheel does not rotate as it travels down the track.  It also feels a bit artificial.  Not sure why but I feel more comfortable using mates that represent real work physical methods. 

Anyway, good enough for a demo!

Cheers,

Owen S.

tate_isaacs

I just used a planar mate and a tangent mate and it seemed to work well for my particular circumstance, I will work on an example, but I would defiantly give it a try if it makes sense for your circumstance.