Unable to get full range of motion from revolute joints

[schmitz.chris]

I'm running into an issue when trying to get a full range of motion out of jointed components. I think I have it pinned down to two specific joints, but I'm not sure. 

The model I'm showing in this screencast is actually a recreation of the same components I made in a different model and had the same limited range of motion issues with. I created this model to see if the issue was with the parts I was trying to move vs other parts of the model. The good part is that The issue is duplicated here, so the rest of the model is fine. The down side is that I don't know what's going wrong 😛

Any ideas??

[schmitz.chris]

Hmm, I just noticed that the screencast I added to the original post didn't end up showing. Here's the screencast if this helps show the problem: 

[TrippyLighting]

Can you share your design ?

I can see a couple of red flags in your design, such as multiple grounding and ungrounding operations. 

[schmitz.chris]

Sure thing. I should have done that off the bat 😉 

Here the link to the model: https://a360.co/2IoAFtK

I'm still learning fusion and am mostly self taught through trial an error, reading tutorials, and watching videos, so I'm definitely happy to hear if I'm doing or understanding something wrong. 

I appreciate the help!

[davebYYPCU]

Well that won't work until you redesign the system, (servo position)

Refering to the video, not the file, 

The lower hole in the vertical purple piece, rotates in an opposite direction to the servo arm.

You are lucky you got any movement.

Reposition the servo centre point, directly under the horizontal pivot arm's centre point, and you will have to match the radius of the pink arm holes, to the servo connection hole.

Might help....

[davebYYPCU · Accepted solution]

Would work if arranged like this, 

Might help, 

[schmitz.chris]

Ah! *facepalm* that totally makes sense. Thanks for pointing out the rotation difference between the servo horn and the arms. 

I went through and made another stand alone example and now I'm getting the expected motions. 

Thanks again for the help 🙂 I appreciate it!

[schmitz.chris]

Again, forgot to finalize the the screencast link 😐

[chrisplyler]

In your original video, the servo horn is trying to rotate away from the linkage, and the linkage is trying to rotate away from the servo arm. No wonder it wouldn't work, huh?

[schmitz.chris]

I'm new to all of this and didn't catch the opposing rotations. Please don't shame me for being a newbie. 

[chrisplyler]

Ewwww sorry. I wasn't shaming. I was commiserating. I swear!

[schmitz.chris]

Ah ok. No worries then. It's def hard to tell intension in text sometimes! 

[chrisplyler]

Yeah. I should have added something about one of my own failures so that it would have been more obvious.