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Extra extrusion after color change  

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Djeez2
(@djeez2)
New Member
Extra extrusion after color change

Newbie here.

When switching colors in a print I see the following behavior:

  • After unloading first color and inserting new color I get I little bit of extrusion to get the new color ready. This looks normal.
  • Then on the question "was the correct color extruded", I reply Yes.
  • Then the head moves to the workpiece and immediately starts extruding while moving

This leads to a lot of misprints. My only remedy is while the head is moving trying to get as much filament out of way as possible.

Do I use the correct procedure? Why the extra extrusion?

(Brand new Mk3S+, PrusaSlice 2.4.2)

Este debate ha sido modificado el hace 3 months por Djeez2
Respondido : 01/07/2022 5:24 pm
Zoltan
(@zoltan)
Moderator
RE: Extra extrusion after color change

Can you attach a short video and more information?

even an old man can learn new things 🙂
Standard I3 mk3s, FW 3.10.1 RC1, MMU2S, no closed box, Fusion 360, PrusaSlicer, Windows 10
PRUSA MINI FW 4.3.4, Prusa Connect Beta

Respondido : 01/07/2022 7:23 pm
JoanTabb
(@joantabb)
Moderator
RE: Extra extrusion after color change

When the printer purges the old colour, resist the urge to pull the filament off the nozzle.just hold it still, reply YES the filament is clear. And the print head will move back to the model. Pulling all of the waste off the nozzle, as it.

Good luck. Joan

 goes.

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Respondido : 01/07/2022 8:13 pm
fuchsr
(@fuchsr)
Famed Member
RE: Extra extrusion after color change

It's by design. It's to repressurize the hotend in case you walked away and didn't immediately press the yes button. As Joan said, needle nosed pliers are your best friend. Just press yes and then hold on to the small piece of filament extruding. 

Respondido : 01/07/2022 10:36 pm
Djeez2
(@djeez2)
New Member
Topic starter answered:
RE: Extra extrusion after color change

Here is a video to show the problem: color switch video

Posted by: @zoltan

Can you attach a short video and more information?

 

Respondido : 03/07/2022 10:19 am
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