How do I print this? (Printing help) - Prusa3D Forum

Issues when printing Prusament PETG Recycled Black

reox — Mon, 11 May 2026 14:45:35 +0000

We need to print a lot of stuff on our XL at work in PETG and bought several spools of Prusament PETG Recycled Black. I used this filament at home on my MINI, and had no issues with it. We already printed over 1 1/2 spools of it but suddenly we ran into issues on the XL. The filament would start to grind down in the extruder and get stuck. We had this issue now on two of the 5 extruders (and I'm currently testing it on Extruder #1, just to be sure it is the filament and not the extruders).

It almost looks like the recycled filament is softer than regular PETG and I even reduced the extruder tension, which did not help. Interestingly, the print looks perfectly fine, until after several layers it simply stops extruding.

We have several spools of regular Prusament PETG (which so far always worked flawlessly) at hand, which I could test too... But before I do more tests, I wanted to ask here first if ...

someone had similar problems with PETG Recycled Black too?
this could be a sign of moist filament? (i.e., these problems started only after the spool was several days in room-air)
this could be some issue with clogging I'm not aware of? (after unloading and loading the filament it extrudes fine)

I also noticed during filament purging that the flow was not "straight down" but it would immediately curl to the front and stick to the nozzle. Is there maybe something blocking the nozzle and thus after some time the nozzle cloggs up and the extruder can grind down the filament?

Printing Servo Horn 25T

mm_22 — Sun, 19 Apr 2026 19:39:00 +0000

Hello Forum,

I've been struggling to print a custom servo horn for a 25T spur using PETG in my Prusa XL. Attached is a screenshot in which I've circled the problematic part in turquoise (this is not the servo horn I am trying to print, I am just pointing out the hole/teeth):

Either the hole is entirely too big (the printer skips the teeth), or the hole is too small (the teeth overlap/fuse). I've gotten tips on slowing the print speed and testing/calibrating the filament rate. I've tried the former with no success, and I am about to try the filament calibration.

Besides these two tips, are there any more suggestions for how to print a servo horn with properly sized teeth? Would buying a 0.2 mm nozzle solve this issue?

Thank you

High speed for one color, low speed for others

Daniel Ezell — Thu, 15 Jan 2026 22:42:30 +0000

I recently purchased a High Flow Obsidian 500 for my 5 tool XL and I want to specify high flow for this tool (and only this tool). Where do I set that up in Prusa Slicer Print Settings?

Specify extruder for infill

Daniel Ezell — Thu, 15 Jan 2026 22:38:41 +0000

I have recently purchased a DiamondBack .8 mm nozzle on my 5 tool XL, and I want to use it for combined layer infill with recycled PLA (whole print is PLA). I'm not seeing a way to specify the extruder, nor a way to specify that it is .8 in Print Settings. Is that something you all could help me with?

How to print text on a surface?

Zachary Turner — Mon, 24 Nov 2025 23:01:03 +0000

I'm using PLA and printing a flat surface with two extruders. #1 is loaded with grey, #2 is loaded with yellow.

I designed the model in Fusion 360, I created the text, then extruded it 0.4mm into the surface with cut operation. Then I did it again and extruded it 0.4mm into the surface using "New Body". This should give flush text. I'm able to assign different extruders to each body so that the text is yellow and the base is grey, and it does that when it prints. But it looks really bad. The text is distorted, the grey writes over the yellow, and it's only barely readable.

Is there a better strategy to doing this?

LW-PLA Prints Falling Over

lozzi — Sun, 14 Sep 2025 21:28:08 +0000

Hello,

Whenever I try to print something taller and thinner in LW-PLA, it falls over at some point mid-print, irrespective of brim size and lower/higher temp setting for both the hotbed and the nozzle.

Any good pieces of advice in this situation?

Thank you.

ASA top layer is rough

Stephane — Wed, 13 Aug 2025 14:19:35 +0000

Hi, I'm trying to print ASA and my top layer is really rough.

I'm using the prusa ASA setting with .15mm layer height structural.

I'm using an enclosure and pre-heat it before starting the print.

I tried lowering the top layer speed and tried ironong, but it didn't help

Put this piece comes out fine with the same setting

ASA weird layers

Baurfurt — Fri, 11 Jul 2025 06:25:43 +0000

Hello, I was trying to print a handle with ASA but some layers came out weird. The most problematic areas are with an 48,5° overhang, which isn't a problem with other ASA I printed before. In addition to that, there were like bubbles in the grip area of the handle.

I dried the filament beforehand for around 5h at 65°C. Bed adhesion is great and it didn't warp.

250°C Nozzle / 100°C Bed / 0,98 extrusion factor / using ASA+ from super-filament / 170mm/s

Do you have any tips where I can optimise my print? Would really appreciate it.

Surface defects on large prints with Prusa XL

Noopy3D — Sat, 31 May 2025 09:42:32 +0000

Hello everyone,

I'm currently using a Prusa XL with a single tool, printing with Jayo white PLA filament.
This filament works perfectly on my MK4S, but when printing large blocks on my XL, I encounter significant surface defects on the part.
Apart from these surface defects, the rest of the print comes out quite well, so I suspect it might be a settings issue.
I would like to understand which parameters could be causing this problem and how to improve the print quality.
I have attach photos to this message to illustrate the issue.
Any advice or recommendations would be greatly appreciated.

Thank you!

Maxence.

Really weird ripples on the walls

SpacemanFin — Sat, 03 May 2025 09:36:05 +0000

I made a new post to insert pictures here and to update what i have done now to fix this.

So my printer does these kind of ripples suddenly and i have no idea what is the reason.

I have tried to fix this with:

- Calibration

- Cleaning everything and tightening screws

- Belt tensions adjustment (85Hz)

- Test with another Nextruder

- Whole maintenance cycle with re-lubrication

None of these helps :/

What is this problem and why it occures. I haven't seen anything like this and i have searched whole internet. I recon it is not extrusion since the top and bottom (and fisrt layer) is flawless.

Here is the video about printer while its doint the test print: https://streamable.com/qefrdd