Filament temperature - MMU3 profiles
Hi.
Just finished installing my MMU3 on my MK4S and I am printing test objects.
The MMU3 itself seems to be working perfectly!
However I notice that the texture of the printed objects is rough and weird. Then I see that the printer is printing at 225 degrees C. (PLA)
I go to prusaslicer and check the temperature settings in the filament menu, and notice that first layer is set at 230C and other layers at 225C. This is a prusament profile. I check all other installed PLA profiles and they are all the same. If I go back to selecting the regular MK4S profile (non-MMU3) and check the same filament profiles, they are back at regular 215C.
Is this normal? Is there a reason the profiles for the MMU3 are set a a much higher temperature than the same filament profiles for non-mmu3 printer?
RE: Filament temperature - MMU3 profiles
Interested to see if you have any further updates with this?
Did you try decreasing temperatures back to their pre-MMU3 levels to see if it made any difference?
RE: Filament temperature - MMU3 profiles
I cannot confirm. At my printer the temperature did not change. Could it be that you have additional drag / resistance on the filament delivery path? I had similar experience with TPU where it was not possible for the nextruder to supply with enough volume.
RE: Filament temperature - MMU3 profiles (CoreOne MMU3)
I have this issue also. Assembled a Core One. Printed beautifully for 2 weeks. Then I added the MMU3 and prints are stringey, even when only using 1 filament. Checked the filament temperatures for stock PLA profile and set at 230/220. Applies to Esun, Generic, Generic Silk, and Prusa. Prusament was 230/225 as above.
I dropped temperatures to standard temps and file printed a lot better. Now only getting "dags" as per photos below:
Overview of Dags
Close up of "dags"
I guess I'm going to be comparing all settings between CoreOne and CoreOne MMU3 and trying to pick which ones apply to high flow nozzle vs standard nozzle and which ones should be changed to align with standard CoreOne profiles.
Does anyone (Prusa?) know why the (CoreOne) MMU3 profiles are different and produce "terrible" results?
RE: Filament temperature - MMU3 profiles (CoreOne MMU3)
I did notice that the compatible printer condition for Generic PLA @ COREONE HF0.4 and @COREONE (ie 0.4 standard nozzle) both contain this condition:
nozzle_high_flow[0]
I would expect the firest profile to show "nozzle_high_flow[1]"?