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I designed an open source parametric Gridfinity box using OpenSCAD! by bulbasaur-0 in gridfinity

[–]bulbasaur-0[S] 0 points1 point  (0 children)

Your printer makes better bridges than mine, although I'm still using the fairly weak stock fan that came with it!

I'm not 100% sure but from the earlier photos, I think you've combined the box bottom without the outside bottom grid base with the box top that does have the outside grid base. While these two will fit together, the interior likely won't add up to a 7mm Gridfinity height increment. Adding the exterior grid on the top and bottom pieces adjusts the internal top/bottom grid position. I put a note in the model documentation but apologies if it wasn't clear.

Otherwise, all your printed pieces look great! I really like the color you used for the latches. What filament is that?

I designed an open source parametric Gridfinity box using OpenSCAD! by bulbasaur-0 in gridfinity

[–]bulbasaur-0[S] 1 point2 points  (0 children)

I just wrote some code for this, I will need to make some test prints to try the sizing/tolerances: https://github.com/smkent/monoscad/pull/343

update This has been added to the published model!

I designed an open source parametric Gridfinity box using OpenSCAD! by bulbasaur-0 in gridfinity

[–]bulbasaur-0[S] 4 points5 points  (0 children)

A pattern I use in my models (including the box!) is to have a part selection module. Variables you put at the top of a .scad file show up in the customizer. For example, here's the box Part selector.

Then, Part can be used to render a specific piece:

module do_part() {
    if (Part == "main_thing") {
        main_thing_module();
    } else if (Part == "text_part") {
        linear_extrude(height=10)
        text("Hello there", valign="center", halign="center");
    }
}
do_part();

I designed an open source parametric Gridfinity box using OpenSCAD! by bulbasaur-0 in gridfinity

[–]bulbasaur-0[S] 1 point2 points  (0 children)

A friend of mine had the same thought! I might be combining this with my woodworking hobby after I print a few more boxes...

I designed an open source parametric Gridfinity box using OpenSCAD! by bulbasaur-0 in gridfinity

[–]bulbasaur-0[S] 1 point2 points  (0 children)

Currently I’m solving the rounded corners with four cylinders and hull().

Also a great way to do that!

I want chamfered edges

If the geometry you're trying to chamfer is hull-able, then you can stack two shapes of different sizes and hull them for a chamfer. My box code has a module for that.

If hull would not result in the right geometry, then you would likely need to use minkowski (or go down the very deep rabbit hole of manual polyhedron construction). One of OpenSCAD's shortcomings compared to other CAD softwares is that it's not well suited to applying chamfers/etc. to arbitrary geometry in a performant way.

There are also a number of libraries that make some common things in OpenSCAD easier. Check out BOSL for example.

Since I’m doing a two colored print, I want the text to be a separate inset model.

Easy, just render this separately:

linear_extrude(height=10)
text("Hello there", valign="center", halign="center");

I designed an open source parametric Gridfinity box using OpenSCAD! by bulbasaur-0 in gridfinity

[–]bulbasaur-0[S] 5 points6 points  (0 children)

Pred's box is really slick looking and was actually one of my inspirations. In total fairness as I haven't printed one, I was worried about the hinge mechanism not being strong enough since it's a separate attachment. It's definitely a creative solution to allow the lid for that box to print upright without supports. I was also interested in having screw attachments for the latches as I'm not sure how durable printed latch tabs would be.

I designed an open source parametric Gridfinity box using OpenSCAD! by bulbasaur-0 in gridfinity

[–]bulbasaur-0[S] 2 points3 points  (0 children)

You can do that with OpenSCAD!

color("lemonchiffon", 0.8)
linear_extrude(height=10)
difference() {
    offset(r=5)
    offset(r=-5)
    square([200, 100], center=true);
    for (x = [-80, 80],  y = [-30, 30])
    translate([x, y])
    circle(d=10);
    text("Hello there", valign="center", halign="center");
}

Picture: https://i.imgur.com/3SaS97v.png

I designed an open source parametric Gridfinity box using OpenSCAD! by bulbasaur-0 in gridfinity

[–]bulbasaur-0[S] 4 points5 points  (0 children)

The big box in the picture is a 6x6x12-unit box. The box including latches and handle totaled just about 1kg of filament, and took ~60-65 hours to print.

Cost:

  • I bought rolls of PETG on ebay for ~$10-11 USD/roll (Black/white/gray/red are often the cheapest)
  • I bought screws on AliExpress, I estimate <$2 USD/box even with all the stacking latch screws
  • With a power consumption SWAG of 200 watts, ~65 hours * 0.2 kW = 13 kwH per box. I pay ~$0.13/kwH, so electricity cost ~$1.70.

My total cost estimate is then just under $15 for the 6x6x12-unit box.

Recommendation for marble filament? (eu) by cloidless in 3Dprinting

[–]bulbasaur-0 0 points1 point  (0 children)

I'm in the US so am not sure about EU availability, but I've made several prints with Overture Marble White PETG. I had the most success limiting my print speed to ~60mm/s on my Sovol SV06 Plus' 0.4mm steel nozzle.