Magnet Jig - BCN3D Sigma

myminifactory

I love the sturdy glass build plate produced by BCN3D for their Sigma range of printers. Not only do I use it on my own Sigma R17, but I've modified other printers to utilize the same glass bed. The best thing about that consistency is that I can maintain different surfaces on the plates and simply swap them out depending on what I'm printing on each printer. However! If there's one failing in the design, it's that the magnets inevitably become dislodged. And, they really do need to be precisely positioned or problems will arise! I thought I'd somehow damaged the gantry on my Sigma, but it turned out to be a poorly-positioned magnet I'd reattached to the glass. I'm getting to the point eventually, I promise! And you've already figured out what this object is because there are photos. But to make a long story short: BCN3D has open-sourced all the Sigma details, including their assembly process and the jigs they use for doing so. With some Google translate help, I located the technical drawings for the bed jig, took the necessary dimensions, and built this tool! Hopefully, it's obvious how it works - just remember that the chamfered guide needs to point at the short edge of the bed (the offset from the corners is not the same on each edge, hence the need for two mirrored versions of this jig).