Dual filament printing with the dual extrudor


I am having troubles finding the way to make a model dual filament. The following thing I tried.

I downloaded a benchy which is designed for multi material If I import two seperate models for example the deck and the bottom of the boat. then I should lift the deck onto the bottom of the boat. But Luban keeps pulling it to the ground (because it probably knows it cannot print in the air).

I have a complete model but I can’t find the way to select different layers to assign to the different filament.

Where am I going wrong, does anyone knows the solution?

There should be an option to “Align models” In Luban somewhere. Find that option, and it should properly align the models for dual extrusion!

will try,


Looks like this will work as you said, at least in Luban it looks good. Will try to print tommorow. Not sure why there is some ghost benchy hovering above the model.

Little update, model kept failing. I took a closer look and there was a space between the brim and the benchy. It seems to me that the “repair” offer which should prevent the model from failing causes this fails. Without repairing the parts of the model seem to auto align. I am printing this model right now so hopefully this solves the issue.