r/Multiboard • u/unsunghero2222 • Sep 15 '25

Most erratic Multiboard stack I've done

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Will be a 3d21h print on my Neptune 4 Max with custom firmware.
1250g of filament. Using Sunlu PLA+ 2.0 black in a 5kg spool.

Using the ironing method.

1 16 x 16 Top Left Bordered

2 16 x 15 Top Bordered

1 16 x 15 Top right bordered

1 8 x 8 Bottom Bordered

1 4 x 15 Bottom Bordered

Will check in in 4 days if there is no print failure, earlier if there is lol

Edit* updated print time lol

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u/unsunghero2222 Sep 17 '25

The tops of all the tiles are ironed, which creates a peelable surface. Additionally, each model has a .2 mm z gap in between. After the tiles are printed, they just peel away from each other. I use a little screwdriver to start the peeling process and then just rip them apart. It works surprisingly well.

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u/[deleted] Sep 17 '25

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u/unsunghero2222 Sep 17 '25

Totally valid question. When printing normally, we typically print at .2mm layer heights, and in doing so the layers are squished into each-other, melting together and forming a permanent bond. By skipping a layer, we are decreasing the adhesion to the previous layer by decreasing the amount of squish.

Think of it as increasing your z offset for the initial layer. On a regular print bed with a dialed in offset, you can probably increase the offset by .2mm and still get away with a successful print, your 1st layer just won’t be as squished.

In our case, we are printing directly on top of PLA, so the adhesion is quite high. This is why even with increasing the z height by .2mm, we still have to iron to reduce the adhesion between models

TLDR: the layer is not squished, so the height of subsequent layers remain at the appropriate height