Why oh why, Colours printing in the wrong order

Hi, without more details on the actual print, I cannot be certain, but I think you must be experiencing color bleeding. Sometimes, there is a little left of the previous filament in the hotend and that may appear several layers later. This can happen if the inside of the hotend is not 100% smooth and/or it is not equally hot across the entire cavity. For example, if a cooling fan is blowing on one side, some filament may get stuck on that side. Eventually it may dislodge (I have seen it happen even after several days of prints) and it may happen more often when mixing filaments of different types or manufacturers which may have different melting temperature ranges. One way to reduce is to play with the advanced transition length settings. For example, going from more “recalcitrant” filaments you need longer distances to purge it completely than the other way around. Same applies for going from stronger colors to weaker colors. It takes a lot more of a light color to purge a darker color, because even a tiny bit of the darker color will show through.

One more thing to check is if you are using bowden, make sure there is no gap in the neck to tube junction. That is a common place for molten filament to hide.

Hey @archjace, thanks for reaching out about this. There are a couple reasons why a model may have colours in the wrong places (we refer to this as the print falling off calibration). It could be because your Palette is not well calibrated to your printer, or the model itself has very short splices and the speed needs to be turned down, or a bad splice could have occurred. The first thing we always check is if Palette is well calibrated to your printer. Could you tell me:

1. Did you complete the calibration keychain as in mm3d.co/firstprint? If so, could you send me a photo of the print and the tower (top and bottom)?
2. Do you have the associated ping data for the calibration keychain print? Instructions on how to access ping data in accessory mode (no Hub) can be found at mm3d.co/accessory-mode-pings and instructions to access ping data in connected mode (with a Hub) can be found at mm3d.co/connected-pings. Pings are very important in troubleshooting calibration errors (mm3d.co/ping-pong).
3. Could you send us a photo of your Palette and printer setup, with a focus on the filament path as it enters the extruder?
4. Could you share your CANVAS keychain project (instructions here: mm3d.co/canvas-sharing) with us?

It may be easier to send this information to alina@mosaicmfg.com when you are ready. Thanks!

Hi @alina , I am starting to agree with @archjace here. In my most recent print test, I am trying to print a novel of the earth. It is definitely selecting the wrong filament. At first I thought maybe calibration was off, but you can see that Canvas is alternating the yellow, blue and green, creating a mess of them. The yellow is supposed to be only at the poles., while the oceans would be blue and land masses would be green. Instead it making a lot of tiny splices of blue and yellow. Here is the project link: https://share.canvas3d.io/projects/380de...

Any one ever find an answer to this my first an only print is doing this 90% of the print is supposed to be 1 color but its another color. The print is large enough this is not bleeding and one section of the print that should be one color is 3 that section is bleeding I can see that, but when the whole body is color number 3 and should be number 2 its odd.

I am having the same issue. I try to print a single STL that I painted in Canvas and it changes all the colors on me when it prints out. What is supposed to be blue is white; what supposed to be white is blue, etc. It’s not bleeding; it’s simply not selecting the right colors from what I chose in Canvas.

Stesso problema….colori diversi dal progetto colorato. ora reinstallerò ancora il firmware e calibrerò meglio con il portachiavi. Però è molto strano!