Problems with pins following path carved in design

[268554Q8L6D]

Hello, 

I'm in a process of designing a terminal panel, and I'm testing hinges, and came to a stop due to problems with correctly restraining pins in a path. Test design looks like this :

Hinge is opened by the 9g servo on the left of pic, that pushes the bottom pin on hinge. 

Problem is, the pins keep jumping out of the grooves/paths. The hinge is supposed to slide forward, then forward+up, then rotate 110 degrees to present a keyboard that will be on the panel. I tried a method from other post, that is giving the pin planar hinge (2 axis and rotation) plus contact set, but then it stops moving completley and just jumps out randomly to left/rigt side of the model. Tried various combinations but to no avail, any ideas on how to solve this issue?

[TheCADWhisperer]

@268554Q8L6D 

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

[268554Q8L6D]

Sure, but closest format I found in fusion was .f3z as the assembly is made from many components (That's how I learned to use them for hinges etc. and for the arm from servo to pin works flawlessly)

[davebYYPCU]

Tangent relationship - was implemented a little while ago, have not used them.

Investigate how they work, 

contact sets don’t work as advertised and should be avoided,

see how you go.

9 grams and a keyboard, ummmm.

Might help....

[268554Q8L6D]

This is mostly for a uni group promotion video and showcase and not a use-and-abuse device, so it doesnt have to be undestructible, that's why its so thin and with small servo. Keyboard is a thin membrane type.

Thanks for the suggestion, but I checked tangent relation, and it kinda works, but not for the full range of motion, as I cannot select the full groove, but a small portion of it. It works great with cams, but terrible with groves and slots.

[davebYYPCU]

Replace the centre lines of the tracks with Splines.

the Extrude Cut should provide a single track surface.

Might help.....

[TheCADWhisperer]

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@268554Q8L6D wrote:
This is mostly for a uni group ...

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Can you ask your instructor to join this discussion?

Unconstrained sketches.

No realistic clearance between moving components.

I stopped there... ...Tip: A 3mm pin will not slide in a 3mm slot in the real world. (Even if we could manufacture perfect parts, which we cannot do.) 

Edit: ...and lots of Moves in the Timeline.  Move is almost always the wrong move (pun intended) as used by beginners.  

Any time you are repeating dimensions like this - you are working too hard.

And blue lines and white dots should keep you awake at night.

[268554Q8L6D]

Well, at this I don't have an instructor, it's a side project for promotion of the group, and they would be more than happy if everything was mounted "to the face" of the model, no moving parts, but cmon where's the fun.

Almost all my knowledge is self-learned so sorry for all the bad practices. We had a tiny bit of inventor, but like a simple revolve or extrusion of a single sketch. (I'm on more of a electrical-engineering profile not 3d modeling).

If the pins are 3mm then sorry but I exported not the last version. I fixed that by doing the offset faces by -0.2 or similar.