Threaded ISO cap not straight

[erin_goldmann]

Hello,

I am designing a canister and have printed the prototype, but when screwing the lid on it sits off center. 

ISO Metric Profile

105.0 mm

M105x4

6H

Right hand

Applied to both the canister cap and body. 

 

Thank you. 

[Warmingup1953]

Mmmm....That does seem unusual. Can you share your file? I assume you created both male and female threads via the thread tool on a Cylinder and cylindrical hole? 101mm?

[g-andresen]

Hi,

Please share the file.

File > export > save as f3d on local drive  > attach it to the post

günther

[erin_goldmann]

Hi,

Thank you for responding.

Here is the exported file you requested.  Hope you can help.

I am new to Fusion 360 so don't mind the extremely messy timeline.

Thanks.

[erin_goldmann]

File has been uploaded.

[Warmingup1953]

There's a lot going on in that timeline, but right back here if I split both bodies and align both cylinders all is good...

[laughingcreek]

when the top and bottom are aligned in the model everything looks ok-

I thing what you are seeing in the pic you posted above is a result of how you have the mating surfaces between top and bottom designed.  right now it gets "tight" when you run out of threads, and when the threads jam into  each other at the ends the lid gets cocked over because of the geometry of the mating surfaces at the termination of the thread.

every non-leaking water bottle ever either uses NPT threads (different can of worms, let's not go there) OR has mating surfaces between the bottle lip and the lid that come into contact BEFORE you run out threads.

[laughingcreek]

scratch that. when the section analysis is rotated 90 degrees you can see an obvious misalignment.   hang on, i'll look closer. it's probably a result of one of those many moves you have in your time line-

[erin_goldmann]

I noticed that the cap(114.14) diameter is slightly smaller than the canister(114.3), which shouldn't be and deviates from my drawings.  In your last image though it looks larger, also rotated slightly.

I am starting a new version of the file and hopefully will have a cleaner timeline.  I wanted to find out what the issue was so I didn't run into the same issue with the new version.  It's not cheap getting this thing made.

[laughingcreek]

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@erin_goldmann wrote:

...I am starting a new version of the file and hopefully will have a cleaner timeline. ...

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That's a good idea.  all the base features, moves, position captures etc in your timeline make the model hard to edit, and hard to trouble shoot.  there are much better approaches to modeling this type of thing.  make your first sketch and post it here.  you'll gets lots of help

[TheCADWhisperer]

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@laughingcreek wrote:

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@erin_goldmann wrote:

...I am starting a new version of the file and hopefully will have a cleaner timeline. ...

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 … make your first sketch and post it here.  you'll gets lots of help

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@erin_goldmann 

Be sure to do as @laughingcreek suggested, do not get ahead of yourself, that would just make issues harder to diagnose. When you finish your first sketch -STOP- and Attach the file here before moving on to next step.

If at any time you are tempted to use MOVE - don’t do it, ask questions first.