Compatibility with 1515/2020 Extrusion

[ManuelLevi]

I’ve been looking into building my rack for a while and noticed that many people opt for 2020 aluminum extrusion. Since this project is positioned as an open standard and aims to benefit the ecosystem as much as possible, it seems relevant to acknowledge the already well-established 2020 and 1515 extrusion ecosystems. Making HomeRacker compatible with these standards would be a meaningful addition to the project.

This could be done through simple adapter parts that preserve the 15 mm base_unit while interfacing with 1515/2020 slots, allowing mixed builds without altering the core design. It would let users combine printed components with extrusions for stiffness, height, or load where needed.

Overall, compatibility with 1515/2020 would align HomeRacker with an existing mechanical standard, reduce friction for adoption, and encourage reuse of existing hardware while expanding the range of possible builds.

[kellervater]

Got this request several times already and like the idea.
The only thing I haven't yet thought through is the locking meachnism here.
Maybe your idea of adapters with a different locking mechanism (like screws or whatever is normally used for those extrusions) is really the best and cleanest option.
Thanks for opening this topic

[ManuelLevi]

Screws can be used, in theory we can even use the existing square holes.

I guess the hardest part is connecting the 15mm to the more popular 2020 extrusion and still have something that respects each standard, if that makes sense

[AJediIAm]

A corner might with 1515/2020 on one side and homeracker on the other side would be an option: https://www.printables.com/model/8051-3030-corner-frame-for-aluminum-extrusions

A plate connector might be easier so a homeracker can be mounted inside a 2020 frame: https://www.printables.com/model/382730-customizable-plate-bracket-for-aluminium-extrusion