Parametric Geneva Drive in Fusion 360

[robduarte]

I made a tutorial showing how I used user parameters to make a customizable Geneva drive. Please leave any comments/suggestions under the youtube video

Good luck..

Rob

[Ndenekamp]

Very nice tutorial, thank you for sharing! Great to see some in-depth video on using parameter driver designs.

I do think it would be great to see the conclusion of makeing the base and adding the joints so that people following along can have the satisfaction of having a working final model. Perhaps a part two video as you mentioned it was getting a bit too lenghty to do it all in once. 

I do with Fusion will soon include a feature of specifying user defined parameters on the go, as you are sketching out your model. Instead of having to make sure you add your parameters beforehand (which works if you already know what they will be as in the case of this geneva wheel, but very often you wont know ahead of time)

again, very enjoyable video, thanks for sharing!

Niels

[macnewbie]

Cool video, thanks for sharing.

[robduarte]

I do with Fusion will soon include a feature of specifying user defined parameters on the go, as you are sketching out your model. Instead of having to make sure you add your parameters beforehand (which works if you already know what they will be as in the case of this geneva wheel, but very often you wont know ahead of time

I agree. You can always dimension things first, then go into the list of user parameters and name them but it would be way better if you could just name them on the fly. You should add that as a feature request in the forums if it's not already there.

Rob

[keqingsong]

This is great Rob, I'll add it to our Modeling tutorial playlist on our Fusion 360 YouTube channel :). 

[karyeka]

Nice video Rob. Thanks.

I noticed you mentioned about the tangent constraint while sketching a line and circle. If you start line on a circle and then press shift it will add the tangent constraint on the go.

Regards,

Anand

[robduarte]

Great, thanks. Any other tips for the points where I stumble would be appreciated. I've been using F360 all last year but there seems to be a lot of shortcuts that I'm missing out on. Is there a spot in the online docs that points out things like this? Another example is the drag-swipe gesture .. is that documented somewhere?

Rob

[jan]

I am trying to follow and reproduce the Geneva wheel assembly but I am running into some problems, maybe very simple but I cant figure it out.

I typed all the parameters in as in the screenshot, exactly as in the video and all without units. I then start the first 'sloppy' triangle and I can not use the parametric value (c1)  for the first dimension. It stays red and I can't select it. I tried to make a new c1 this time with mm as units and I can select it OK. Problem now is that when I try to type in the expression for b1, it wont let me and it stays red. As mentioned in the video, using units will cause issues but also without units, I am getting stuck.

Could anybody have a look at this and let me know how to get this going or point me in the direction where I am going wrong?

Thanks.

JB

[robduarte]

Not sure off hand, but if you need units for a parameter you can do this: c1 * 1 mm (or whatever unit you need). Give that a try...

[jan]

Tried it and it works as expected. Made some changes to the parameters to change from radius to diameter for some dimensions but all is OK now.

Made the first iteration and setting up CAM now to machine it. Wonder if the parametric set-up goes all the way to the CAM set-up. Will try and post the results, if it does, it would be fantastic.

Thanks again!

JB