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rickbear

Plant Seed Storage Box

by rickbear Apr 12, 2018
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If you don't mind me asking... I'm pretty new at this, but recently attempted to make a container very similar to this one. Is there a trick to calculating the dimensions of the lid vs. the container, in regards to diameter? Every attempt I made, the lid would not fit properly. I gave up because I was just wasting time and filament trying to guess the size.

What modelling program do you use to model your container?
I used Fusion360 which makes it very easy to create threads into things. I just created the same thread in both container and lid. One carved into the model and the other added to the model. I did not do anything special beside that. Even not give it extra space for tollerance. Fusion360 handels that pretty well.
What could make problems (and that would be the same to any model which needs a precise fit like holes for rods, screws etc.) is, that depending on the slicer you use and the diameter of your nozzle etc. there can be a difference where plastic is extruded. ON the line or OUTSIDE the line. A nozzle printing of 0,4mm width printing a circle ON the line would make the circle 2x 0,2 = 0,4mm smaller. Most slicers should consider this and also do correct it. But under certain circumstances it doesn't.
I know nothing about your model, but maybe this helped a bit if I did not misunderstood.

Thank you for the info! I'm using Fusion 360 as well. I think my problem is that maybe I'm not letting Fusion 360 know that the two parts go together. I'm guessing there is some kind of way to relay to Fusion 360 that two parts go together so it can properly size things correctly.

Maybe... I am not sure. When I started with Fusion360 I started with this video:
https://www.youtube.com/watch?v=A5bc9c3S12g
It's a series of 3. The last one I think shows how threads works. That was how I learned it.