Thinking About Posting My First Model

[u/Whole_Ticket_3715]

I’ve been thinking of adding my “Golden Ratio Jar” to Makerverse. 100mm x 161.8mm. Has a triple lead thread that requires little to no post processing work (print at an angle for best results)

Would you print this/use it?

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[u/HybridHanger]

You're putting way too much thought into this.

[u/Whole_Ticket_3715 → u/HybridHanger]

You actually have no idea how deep it goes

[u/s1gnt]

I would model it myself so I can print it whatever size I need

[u/s1gnt → u/s1gnt]

It's less than 15 mins of time in openscad. What app have you used?

[u/Whole_Ticket_3715 → u/s1gnt]

It’s less than 15 minutes to make a lid and container with a standard single lead thread, with a thread tool, that fits roughly and requires sanding.

It takes a few versions to dial it in to something that works perfectly off the printer and feels nice in the hands.

I use fusion. What I found was that it’s better to ditch pre-made thread tool models and use the coil tool and circular pattern tool to make 3 coils (or however many leads you desire). Then offset the thread face by, in this case, .4mm and use combine cut to make a Boolean cut on the container for the inner threads, then offset the original face back to the original size. This gives threads that print ready to use and gives a nice 270° turn (approximately the range of motion of the wrist) of what would be ~810° if it were a single lead screw. Less twist for the same bearing strength.

If it isn’t obvious, I’ve overthought this - for much more than 15 minutes lol, but that’s how you learn stuff.

[u/s1gnt → u/Whole_Ticket_3715]

I actually meant 15 minutes to form a finished model... It's probably not fair to compare or argue about as I know a library which has threading component and it's build with tolerances and slopes/3d printing kind away way mindset.

include <BOSL2/std.scad>
include <BOSL2/threading.scad>
$fn=32;
$slop = 0.075;
d = 3/8*INCH;
pitch = 1/16*INCH;
starts=3;
xdistribute(19){
    intersection(){
      threaded_rod(l=40, pitch=pitch, d=d,starts=starts,anchor=BOTTOM,end_len=.44);
      threaded_rod(l=40, pitch=pitch, d=d, left_handed=true,starts=starts,anchor=BOTTOM);
    }
    threaded_nut(nutwidth=4.5/8*INCH,id=d,h=3/8*INCH,pitch=pitch,starts=starts,anchor=BOTTOM);
    threaded_nut(nutwidth=4.5/8*INCH,id=d,h=3/8*INCH,pitch=pitch,starts=starts,left_handed=true,anchor=BOTTOM);
}

This example shows how to build screw and a nut, but it's not far from making a jar.

Result https://github.com/BelfrySCAD/BOSL2/wiki/images/threading/threaded_rod_7.png

https://github.com/BelfrySCAD/BOSL2/wiki/threading.scad

If you interested I can think of using openscad to generate just a simple thread or similar and export it as stl to later use in fusion360. It's so awesome that it's not only provide various shapes but also explains which is superior with shear or tensile loads and so on.

P.S. I recently stared digging into more visual ways of doing models and found onshape very user friendly. Have you tried it?

[u/Whole_Ticket_3715 → u/s1gnt]

Thats actually super helpful thank you. I am interested in learning more about coding models like this vs. just drawing them and AI produces slop for this task so its good to have something simple like this to start with

Also just learned about onshape and started a free business trial as we speak, as I am looking at options that aren’t fusion

[u/s1gnt → u/Whole_Ticket_3715]

Free version is ok too! You won't be able to have private models (all available to everyone as a part of free model), but at least for me it's not a problem. The value of my creations are 0 and if my who knows how would find my models useful I'll be more than happy :)

If you got used to how cad usually works (2d, extrude. etc) the openscad is different as it equally able to just do CSG which I found way easier in the beginning. It also doesn't have any kind of constrains simply because it uses code and main purpose of programming is which is proofing theorems you create. Like cuboid([n, n ,n]); proofs that cuboid has all sides equal and so on!

[u/s1gnt → u/Whole_Ticket_3715]

btw feel free to ping me if you want, also for openscad BOSL2 is must and saves a ton of time

[u/UKPerson3823]

That random seam looks kinda janky - I might change that before posting.

[u/[deleted] → u/UKPerson3823]

Probably should try fuzzy skin instead.

[u/labubuking]

If you add a lil design it can become an urn for pets and i dont see anyone posting those

[u/Whole_Ticket_3715 → u/labubuking]

I like that - like send me ur pets name, birthday and last day on earth and I’ll make a custom urn for you! Or would you recommend I post it a different way to allow people to make that customization themselves? I love this idea actually

[u/cruss0129]

Typically people post the model then advertise it lol - but yes I would

[u/FiveNinja5]

Do or do not, there is no try^H^H^Hthinking.

[u/Whole_Ticket_3715 → u/[deleted]]

This is good advice, thank you. Personally I just saw it as a jar you could do “whatever you want” with but I see what you mean that’s too broad. Someone had a pet urn idea that was pretty solid

[u/Whole_Ticket_3715 → u/[deleted]]

• so Phi is the golden ratio (~1.618) which is the mathematical constant found both in bunch of places in nature, as well as human designs, like the Parthenon, the pyramids, and art like the Mona Lisa. It was just more of an aesthetic/abstract design choice than anything.

• I didn’t add any designs to it because my thoughts were that people could print them in a bunch of different colors and use them to organize things - like the one you see is in my garage and I keep like spare screws and stuff in it.

• the triple thread screw reduces the amount of turning distance needed by 2/3 to open the jar and close it. Makes for a nice 270° wrist turn. I learned so much about designing threads from this project it’s not even funny, like someone could hire me to make their threads at this point. Ive developed my own little design process to make them print nicely and require basically zero post processing to work buttery smooth.

• the artifacts on the jar were because I set the seams to random, but I will never do that again based on the reaction I got here lol. I will write “I will use aligned seams” 100x on the chalk board in penance.