We’ve been having a weird problem. We’ve been trying to print a large (30ish hours) dual extrusion print and we the print keeps shifting about half an inch on either the x or y axis. It only does this once on the print and either does it after the 2nd layer or near the top. We’ve also been able to successfully print far more complicated dual extrusion prints without any problems (though they were only a couple hours long).
We’ve checked the belt tensions and they’re all even and right, the guide rods are all straight, we’ve checked the g code in a visualizer, and we’ve tried printing at half speed. We’ve also tried setting the files up for dual extrusion in both tinkercad and 123d design, but get the same results for both.
We’re out of ideas on what could be wrong and any help would be greatly appreciated.