Problems with joints seeming to not function correctly

[40580024]

I've been making a claw with a linear actuator and have been having problems with getting the claw to move at a full range of motion. This is my second try with the same design thinking it was my bad modeling, but I've found the same problem with my design. The full range of motion is supposed to be 50.8mm(2in) and it won't retract farther than 30.8mm. I've tried changing arm lengths, but that's about all I could think of as a problem with it so I came here.

[jhackney1972]

Please attach your model.  If you do not know how to attach your Fusion 360 model follow these easy steps. Open the model in Fusion 360, select the File menu, then Export and save as a F3D or F3Z file to your hard drive. Then use the Attachments section, of a forum post, to attach it.

[40580024]

Here it is.

[jhackney1972 · Accepted solution]

I am returning your model.  I broke the link to the Cylinder so I could easily send it to your as an F3D file.  In the Animated GIF you will see I can drive the cylinder from 0mm to 50.8mm, which I assume is the measure you are talking about.

[40580024]

Yes, It works just fine now, thank you! How did you fix it? I see you grounded the IP68, but what else?

[jhackney1972]

I changed the outside back Revolve Joints to Cylindrical Joints due to some joint motion problems.  With a Joint system, like this one, you need some degree of freedom to accommodate some misalignment but also have the rotation you need.  The other Revolve joints hold it in place.

[40580024]

Ah, Okay. Good to know for later projects. Thank you again. Have a good day.