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Blobbing, Stringing, Oozing...Tried it all  

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Chase C.
(@chase-c)
Active Member
Blobbing, Stringing, Oozing...Tried it all

Good Morning/Evening,

             I recently acquired an MK3S that had problems with the nozzle jamming into the bed. Long story short, it had a bad PINDA sensor, so I upgraded it to the MK3S+.   Cutting to the chase, I can not get this thing to stop oozing non-stop (before print, during print, after print). I have completely rebuilt the hot end multiple times, thinking it was perhaps an air leak or damage.  I additionally found damage to the printed parts of the extruder and that it was incorrectly assembled, and I have since completely rebuilt the extruder.  I have gone through this MK3 several times...but I am at a loss for what is wrong with it. 

Things of note:

At startup, during the initial fan testing, the filament fan (layer fan) makes a slight noise (it sounds like bearing drag), but this goes away. No fan RPM alarm trips during any print, and it passes all calibrations...although I don't think this would contribute to extreme oozing.

I have rebuilt the hot end at least five times. I am very confident that it is assembled correctly.

When using the Cura slicer, there is a noticeable improvement in print quality, but stringing, oozing, and blobbing is still present.

YES, I DRY MY FILAMENT.  It is NOT a moisture problem. (below 15%RH)

Below are the things I've replaced.

SPINDA

RAMBO Board (don't ask.... made an oops with a brass brush and let the magic smoke out)

All new printed extruder parts

Hot End

Teflon Liner

Heat Break

Heater Block

Heater Cartridge

Heat Block Thermistor

Nozzle (.4)

 

I have tried every setting, every retraction possible, and read almost every forum I could find.  

Benchy pictures are in PLA (I broke the smoke stack on accident)

Some of the parts are PETG

I hope someone will see this, know exactly what is wrong, or have experienced something similar and help me out. I am at my wit's end with this. 

 

This topic was modified 5 months ago by Chase C.
Posted : 24/06/2024 11:59 pm
Chase C.
(@chase-c)
Active Member
Topic starter answered:
RE: Blobbing, Stringing, Oozing...Tried it all

I have also tried every variation of temperatures possible. 

Posted : 25/06/2024 12:07 am
Diem
 Diem
(@diem)
Illustrious Member

YES, I DRY MY FILAMENT.  It is NOT a moisture problem. (below 15%RH)

It's still damp, dry it more.

Cheerio,

Posted : 25/06/2024 11:57 am
Chase C.
(@chase-c)
Active Member
Topic starter answered:
RE:

Sorry I have to disagree with you. The filaments print fine on both my MK4 and an Ender 3 I have.

I dried one roll for 36 hours, no change.

Filament is not the problem.

This post was modified 5 months ago by Chase C.
Posted : 25/06/2024 2:02 pm
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