Threads on nut and bolt don't align. Can't understand why

Threads on nut and bolt don't align. Can't understand why

paulo_peppe
Explorer Explorer
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Message 1 of 6

Threads on nut and bolt don't align. Can't understand why

paulo_peppe
Explorer
Explorer

Hi All! I am developing a small container for an AirTag to be 3d printed. Happens that I applied the same thread (m36x2) to the internal and external surface of models, but for some reason I can't figure out they are not aligned. I have done this before and both threads automatically aligned from beginning. Could anybody help me to figure this out? I have attached a section view and the model. Thank you a lot.

 

Link for the model:

https://a360.co/4bjW4SQ

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Accepted solutions (2)
1,217 Views
5 Replies
Replies (5)
Message 2 of 6

g-andresen
Consultant
Consultant

Hi,

Turn the cap a little

 

 

günther

Message 3 of 6

MRWakefield
Advisor
Advisor
Accepted solution

In my experience you're lucky if the internal and external threads on an assembly such as this line up without a bit of fiddling. I'm not sure how Fusion decides where to start the thread helix from but you can just rotate one of the components until the threads line up. In the below screenshot I created a joint between the two parts with a rotation of 64°.

 

MRWakefield_0-1714759121536.png

 

Hope this helps.

 

If this answers your question please mark the thread as solved as it can help others find solutions in the future.
Marcus Wakefield


____________________________________________________________________________________
I've created a Windows application (and now Mac as well) for creating custom thread files for Fusion. You can find out about it here. Hope you find it useful.
If you need to know how to offset threads for 3D printing then I've created a guide here which you might find useful.
If you would like to send me a tip for any help I've provided or for any of my software applications you've found useful, you can do this via my Ko-Fi page here.
____________________________________________________________________________________

Message 4 of 6

paulo_peppe
Explorer
Explorer

Thank you guys! So I understand that as long as I use same parameters I am good to go, even though it might look unaligned on screen, right?

As for the "create a joint", is it a better solution than rotating it manually? 
Thank you again!

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Message 5 of 6

MRWakefield
Advisor
Advisor
Accepted solution

As for the "create a joint", is it a better solution than rotating it manually? 
Thank you again!


Whenever you have an assembly it's always best practice to connect the components to each other with joints. Using joints means that you have a more robust and predictable model. As an example: in your model you're able to drag the cap around in free space, there's no relationship between the two components. If the cap gets dragged away from its intended position you might not notice and could cause some head-scratching down the line when things don't look quite right and you don't know why. Joints tie everything together and enable other functionality in Fusion such as motion links.

If this answers your question please mark the thread as solved as it can help others find solutions in the future.
Marcus Wakefield


____________________________________________________________________________________
I've created a Windows application (and now Mac as well) for creating custom thread files for Fusion. You can find out about it here. Hope you find it useful.
If you need to know how to offset threads for 3D printing then I've created a guide here which you might find useful.
If you would like to send me a tip for any help I've provided or for any of my software applications you've found useful, you can do this via my Ko-Fi page here.
____________________________________________________________________________________

Message 6 of 6

g-andresen
Consultant
Consultant

Hi,

The point here is to make it clear that it is only a matter of a different starting position of the threads.
The print result is not affected by manual rotating or a using a joint.

 

günther