Multimaterial prime tower failed

U1 Toolchanger U1 Troubleshooting guides
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Hi,

I wanted to print with petg as support on my Pla print. This worked great until the printer tried to print pla above petg on the Prime tower. So what it was supposed to be in the model - bad sticking between petg and pla is really annoying on a prime tower. The pla had no adhesion at the petg tower and was just getting spaghetti. So the tower failed and later the print.

Is there any setting to print different Prime towers for different materials?

2

Looks like what you asking for is already open in Orca as feature request.

Here is the work around: Separate prime towers for multi material prints Ā· Issue #8474 Ā· OrcaSlicer/OrcaSlicer Ā· GitHub

We have found a workaround for this as outlined below:

  1. Manually add one cylinder per material type that are the same height as the last material change

  2. Apply one material to each cylinder

  3. Make sure that the added parts are before the printed parts in the object list

  4. Select ā€œIntra-layer orderā€ to ā€œAs object listā€

Taking all of those extra steps forces the basic behavior we are looking for, and the cylinders are effectively prime towers due to the forced printing order established in step 4.

This might also work, from discord chat:

I believe, but donā€™t remember right now, that you can set what the outer structure of the tower is made of. Then it just uses the inner structure for prime lines.

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You can try this settingļ¼

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Yes, @Wyphorn.

@Simon_Zhi @nik4223

Not a bug, just a default that needs to be changed.

In the Multimaterial print settings, you can change the prime tower material from Default to whichever is the primary material in the drop down. When you slice, you should then see the shell is a single color.

Default allows it to choose the most efficient regardless of material. Fine for multicolor.

If all materials used donā€™t stick to each other, need to switch to tell it explicitly to print the tower shell in one primary choice. Ideally you choose whichever one is used in the upper most, or at least the most layers since this will be called on every layer.

This is another great application for Breakaway material for PLA if doing multicolor prints. So far, itā€™s worked fine for me even inside the prime tower shell. :grin:

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