Whats the easiest way to add a rigid joint to the chamfer below the thumb screw head to the chamfer on one of the holes in the fixture? In solidworks I would just select both faces and add a coincidence mate. Is there a way to do this without adding an offset? sometimes I feel the joints work well but so often I miss the solidworks mates for their simplicity and versatility.
how do I join two chamfered surfaces to each other
Hello owenhooker,
Probably I totally misunderstand what you want to achieve, but if both chamfer angles are equal, the method @vex proposed should work.
This is what I got that way:
Best regards,
Ludo
Hello owenhooker,
Just for reference, here is a nice video @TrippyLighting made on Joints.
Best regards,
Ludo
I can see how your example would work because your chamfers are the same length. My problem is a bit different because the chamfered surfaces are not the same length and the joint centers don't line up axially. I know I could use a joint origin but It would be a pain to make it so it would change parametrically if the chamfer length on either part is modified. The one example of something similar is a autodesk video mating a flat head machine screw to a countersunk hole assumed the top of the bolt would coincident with the top of the chamfer. The example didn't take into account that someone might want to have a larger countersink to guarantee clearance in which case the top of the bolt is not at the top of the chamfer. anyway here is a section view of what i get if i dont use an offset.
Hello owenhooker,
Chosing the lower edges of both chamfers is not an option? The chamfers can be of a different length.
Of course if the diameter of the lower chamfer is larger than the bolt, the bolt will drop below the upper chamfer edge.
I'm guessing you need to keep the chamfers in sync.
-Ludo
Ludo in your examples the bottom edges of your chamfers are the same diameter which is why they work. What I want to do is to join parts regardless of the bottom or top diameter. My parts are close to the same diameter on the bottom but not exactly so they still are not coincident when choosing the lower edges. This is why I think Fusion needs the ability to add a coincident Joint/mate. I would be interested to hear from someone at autodesk as to what they would do to constrain these parts.
) 
Here's an example using a contact set and a cylindrical joint. You can drag the pin up and it will pull back to a touch.
File attached
Mark
Mark Hughes
Owner, Hughes Tooling
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Are all the thumb screws identical and the chamfers on mating part, if they are you only need to get one right using a contact set then align the top faces for all the others using a planer constraint.
Simple example file attached
Mark.
Mark Hughes
Owner, Hughes Tooling
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Here's a workaround using 2 hole features. The first hole sets up the countersink through hole to the smallest size of the cone on the screw so you can use it for the joint. After setting up the screws using joints use a second hole feature to make the clearance hole. With all the joints setup you can edit the countersink diameter or the clearance hole and the screws will stay seated in the countersink.
Mark
Mark Hughes
Owner, Hughes Tooling
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