Origins in Fusion are connected using joints, which essentially "snap" together parts using origins as a point of reference (it is a lot easier and intuitive than I make it seem). However, there are a few different types of joints that are used.
To create a joint simply go to the tool menu and select the "joint" tool. Click on two origins (make sure you are choosing the correct ones), and it will preview what it will look like. Note that if you created a ridged group from a wheel/sprocket, the preview may only move the interior insert, however it will correct itself if you hit enter. Next to the "position" tab in the tool there is a "motion" tab where you have multiple types of motions. It is important to choose the correct one, so that edits can be made more easily, however you can still change the type of joint after you create one.
![](https://static.wixstatic.com/media/01784c_6614d7483cdd41ac8abab07894ab3adf~mv2.png/v1/fill/w_241,h_408,al_c,q_85,enc_auto/01784c_6614d7483cdd41ac8abab07894ab3adf~mv2.png)
Rigid joints. These are used for anything that doesn't move. Things like this include screws + nuts, bearing flats, and any structural parts that don't move such as chassis, or standoffs.
Revolute. This difference for this is that it allows the object to revolute. It is best used for gears, sprockets, and wheels.
Slider. This is for things that slide linearly such as the linear sliders, or shafts (this is especially useful for if you are not sure where the shaft should be positioned).
Additionally there are 4 other types of joints: cylindrical, pin-slot, planar, and ball. However we have not run into cases where we needed to use any of these, and therefore don't have as much experience. If you need more information I recommend looking at this video which explains things well (he starts talking about joints around the 24:30 mark). All different joints have different specifications that go along with it (such as which axis a revolute would rotate on etc.). Luckily Fusion animates your parts so you can easily see what will happen. It's not that big of a deal, just make sure to check over it before you create a joint.
Finally, if you do create a joint and you want to edit it, all you need to do it right click on the joint and edit it in order to change type. Happy building!
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