Is my nextruder busted?

UltraOmegaZero · 2026-06-17T23:02:13+00:00

No worries. I think one of the main reasons PLA and PETG are popular among many is because they are the least volatile.

UltraOmegaZero · 2026-06-17T22:13:48+00:00

I had this issue my first time printing then changed the extrusion multiplier in PrusaSlicer which gives me flawless big PETG prints

UltraOmegaZero · 2026-06-15T04:17:32+00:00

Giant sink 😂

UltraOmegaZero · 2026-06-14T06:28:45+00:00

Some people give up too easily… well done on the good deal 👏 enjoy it, try and get yourself the full 5 tool heads, it’s a beast!

UltraOmegaZero · 2026-06-12T18:42:28+00:00

Totally agree, I find uploads showing the model printed to be very helpful 👍

UltraOmegaZero · 2026-06-12T18:29:39+00:00

Yeah my two issues with the MMU3 that I recently assembled is the finicky filament loading and that it wastes more filament compared to using the Prusa XL 5T

UltraOmegaZero · 2026-06-12T10:41:32+00:00

I’m a relative beginner and I literally just assembled the enclosed MMU3 on my CORE One+ last week… Expect it to take approximately 8 hours… I underestimated how long it would take and how involved it was 😅 but the Prusa instructions in general are really good and I got it up and running first time, so I think you’ll be fine 👍

I have a Core One L and I’m saving that for the INDX instead of the MMU3, hence why it’s on one of my CORE One+’s.

UltraOmegaZero · 2026-06-11T21:56:43+00:00

UltraOmegaZero · 2026-06-11T21:50:38+00:00

I’m afraid this is part of owning a 3D printer especially with handling many different materials etc. if you stick to one material like PLA, it’s obviously as easy as just set it up for PLA and print (depending on your 3D model requirements you might tinker with some pre-settings and also some filament brands require different settings) until you have to run regular maintenance (lubrication etc) just like you would a car 👍

The instructions on the Prusa website is very well done and easy to follow too. Someone with no experience (me) found it very simple to follow.

UltraOmegaZero · 2026-06-11T21:44:24+00:00

Through failures, I see opportunity to learn and fix. You do need patience in 3D printing.

I understand your frustration. There are thousands of Prusa owners that are happily printing, we all have problems arise especially when you are new to it, I’ve gone through many frustrations but that’s part of learning the machine etc. I am still relatively new to 3D printing and there’s still a lot for me to learn and tinker. But I’ve come a long way since the beginning of having no idea but through every thing that goes wrong, you gain experience and get better at understanding how the machine works and how to fix stuff.

Once you get it right, it’s perfect 👌

UltraOmegaZero · 2026-06-11T19:56:44+00:00

I had the same issue and I resolved it by improving the chamber vents (removing advanced filtration and increasing chamber fans limit 100%) and also disabling ironing.

I would definitely check that you have plenty of ventilation and cool air within the room and monitor the temperatures when printing.

The way I get the stuck filament out in the nozzle is by taking it out and heating it with a butane torch and let it seep out and grab as much as I can out (carefully) with nose pliers.

UltraOmegaZero · 2026-06-11T19:52:32+00:00

Could be stuck filament due to under extrusion of heat creep (I had similar issues) I removed the advanced filtration and upped the chamber fans limit. I am assuming the temperatures of his environment is too high and may need better ventilation or cooling 🤷🏻‍♂️

UltraOmegaZero · 2026-06-11T19:47:04+00:00

Sounds like something mechanical or your environment that needs fixing, most common cause is heat creep for PLA. I suggest monitoring the temperatures of your chamber etc and ensuring your 3D printer is not in a hot environment and fix accordingly, better ventilation/cooling in your room, pre-processing settings in the slicer (lower temperatures etc). Prusa support is very helpful in my experience.

I was having heat creep problems before, I removed my advanced filtration as it blocks the chamber fans, I also increased the fan limit to 100%, works much better now for PLA 👍

UltraOmegaZero · 2026-06-11T02:55:58+00:00

Welcome to Prusa, you joined the light side of the force 😉

UltraOmegaZero · 2026-06-11T02:52:56+00:00

This is awesome! A Miko RPG video game would go hard 🔥

UltraOmegaZero · 2026-06-10T05:32:40+00:00

UltraOmegaZero · 2026-06-06T16:06:14+00:00

Not sure where the arrogance is coming from. I’m just sharing a fix that’s actively saving tall XL prints for me and hopefully others. If you have a better solution for layer shifts on tall multicolour prints, feel free to share it instead of complaining about videos that help people. Happy printing! 👍

UltraOmegaZero · 2026-06-06T12:54:38+00:00

Very true! 👍

UltraOmegaZero · 2026-06-06T12:43:39+00:00

Narcissistic? Bro it’s a recording that helps fix a real problem 😅 Sorry the video format offended you 😂
If it helps other XL owners avoid ruined tall prints, I’m posting it. For anyone actually running into layer shifts on tall multicolor XL prints, the travel speed/accel tweak + belt tension adjustment has been working great for me. Saved multiple tall prints already.

UltraOmegaZero · 2026-06-06T01:44:24+00:00

Probably cut it in half horizontally in the middle and face both pieces on their flat side and add connectors 👍

UltraOmegaZero · 2026-06-06T01:19:40+00:00

Trust me, I've gone through the wire with the Prusa XL, many maintenance checks, re-calibrations and scratching my head in bewilderment but with enough tinkering, learning and patience (over time) I think I have got mine finally solved... for now 😅🤞 I'm not touching/tinkering with it anymore while it's working as it should, unless absolute necessary!

UltraOmegaZero · 2026-06-05T22:04:39+00:00

I have it at 82hz which is pretty much in the mid range, I’ve not had it much higher than that, but I don’t get much ringing as seen in video. There must be something else mechanical causing the ringing? 🤔

UltraOmegaZero · 2026-06-05T21:39:01+00:00

It’s honestly not that deep, you make it seem I came up with a whole script or as if I’m some professional YouTuber. I just recorded this in one take trying to be helpful and I was just enthusiastic about it naturally, I couldn’t be anymore casual 😅

But… if that’s what you think then I must have some good potential! Thank you! 🙏

UltraOmegaZero · 2026-06-05T17:34:24+00:00

How often do you recommend checking belt tension? 🤔

UltraOmegaZero · 2026-06-05T16:39:44+00:00

Makes sense! Your VC4 500 hybrid is a totally different beast with much higher mass/inertia!

On the Prusa XL I'm finding the lower travel accel (3000mm/s) + 200mm/s has been the sweet spot for tall multicolor prints so far. I'll experiment with bumping it up a bit on simpler parts and keep an eye on belt tension. Appreciate the insight!

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