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printing and designing joints  

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blatti
(@blatti)
Trusted Member
printing and designing joints
Who is experienced with the construction of joints?
I want to print it and eventually everything should be ready ...
of course, the first time you move the items the support structure must be broken.
For example, considering a role, I could imagine a 0.3mm gap and the 2nd part is around it.
What does Prusa Slicer do ... aso. ?
:)

if you can imagine it - if you can design it - you should print it!
Make the impossible - possible!

Posted : 27/09/2019 3:41 pm
rmm200
(@rmm200)
Noble Member
RE: printing and designing joints

I think you are missing a picture - or something...

 

Posted : 27/09/2019 4:45 pm
blatti
(@blatti)
Trusted Member
Topic starter answered:
RE: printing and designing joints

one or two of this arms should be movable

if you can imagine it - if you can design it - you should print it!
Make the impossible - possible!

Posted : 27/09/2019 7:47 pm
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(@)
Illustrious Member
RE: printing and designing joints

You are asking an engineering level question.  Design the joint for how you are going to use the part.  Any other answer will not fit your design goals.

Posted : 27/09/2019 9:36 pm
blatti liked
blatti
(@blatti)
Trusted Member
Topic starter answered:
RE: printing and designing joints

Thanks Tim - perfect answer ,

first shot did work. 1mm is between the holding device and the moving arm. Inside was a cylinder with diameter 12mm and the moving arm got 12,6 mm. Obviously the gap is 0,3mm around. This toy is unbelievable!

Attachment removed

if you can imagine it - if you can design it - you should print it!
Make the impossible - possible!

Posted : 28/09/2019 6:04 pm
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(@)
Illustrious Member
RE: printing and designing joints

Very cool!  And I presume it is a single print, not two pieces fitted together.   

When I posted above, it occurred to me the Flexy-Rexy parts may have a solution, but the tripod legs seemed to yell ball-socket joints (3 degrees of freedom required).  Hence the "no clue" answer.

Posted : 28/09/2019 6:14 pm
Talaminator
(@andrea-t)
Active Member
RE: printing and designing joints

Very nice! Generally when I print parts like that I print them vertically (I mean so that the cilinder of the hinge will be printed vertically), this way it should turn more smoothly once printed because of how layers are deposited.

Eventually if you manage to modify the design so that when the hinge is "closed" it resemble a sort of cube(maybe better a bit higher) you can eliminate any overhang and so you might still be able to print in place, still without needing support , and if I am correct ending up with a smoother motion of the hinge!

Posted : 29/09/2019 11:42 pm
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