Color deviations Bambulab A1 mini

Bambu Lab A1 Series Bambu Lab A1 mini
1

Hi everyone, have you ever had the problem of color deviations in your printed model?

It’s very noticeable with silver. It’s also noticeable with red, depending on the viewing angle.

The printer is a Bambulab A1 mini. I used the Bambu Slicer (Bambu Studio) software.

The filament is from Geetech.

Can I do something about it?

Thanks

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It looks like you are suffering one or two problems.

  1. Depending on the material, it can come out slightly different depending on the speed it prints.

    • Using the preview tab, change the Slicing Result view to Speed and Layer Time to see if the areas of concern match up with the printed results.
    • If they do, you can use layer height range modifiers to adjust the speeds in those areas to even them out.

  2. Flushing Volumes may need tweaking if the black of the visor is bleeding into the helmet body.

    • From the angles of the photos this may not be the reason, just, it often can be.
    • But, it looks like the problem begins before the black starts, leading me to question this potential reason.

If the materials are silk (you do not say), these are more prone to this issue.

To test, use a plain white or light grey that is not a silk and print the first cm, stop before you hit the visor.

If it is all seemingly the same, the issue is the type of filament and speed changes should fix it.

The reason the speed changes it the time it takes to travel, it looks to start where the front has a bump in the design and the length of the ellipse is getting bigger.

1 Like
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Thanks for your reply.

I have one more piece of information. The visor is printed separately and glued to the helmet.

4

It clearly isn’t involved then.

Refer to my main suspect, the speed combined with the filament type.

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On that model I would probably try and uncheck slow down for overhangs. This fixes color change on most PLA or PETG HF parts where speeds affects color for me. Even with some overhangs I still get good results and don’t notice a change other than my color is now consistent. I would try it on that model for sure after looking at its shape. This will make the speed the same on all layers, and you can usually see the results when looking at preview under speed but not always. This is dependent on the filament, some are more sensitive to color change with speed.

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depending on the filament and the thickness of the layer and amount of material as well as dramatic changes in the filament being laid down (a little too in, a little too out, etc) can cause this.

before fiddling with complicated settings i would simply calibrate your device, do some minor maintenance like dusting and oiling and ensure that your filament - even if its PLA - is properly dried. it would also be a good idea to check if your silicone sock isn’t damaged because it can trap debris or even filament as it comes out of the nozzle.