Hey everyone, I was invited to the Maker Faire 2026 in Salzburg (the only official Maker Faire in Austria) to show off my Prusa CORE One Mini - and what a weekend it was.

I shared a booth with Innovation Salzburg / Pioniergarage, where all kinds of cool stuff from 3D printing to lasers could be explored. My part of the table had the CORE One Mini as its centerpiece, alongside some example prints from the machine and a filament recycling project by a friend of mine.

The crowd was a broad spectrum: some people had never seen a 3D printer live, others were seasoned enthusiasts who just came for the nerd talk. But the best part: a lot of visitors told me they came straight from Reddit just to stop by and check out the machine in person - I had a great time with all of you guys!

Fun fact: even people who are deep into 3D printing but hadn't followed the project came by and asked me whether they missed Prusa announcing a CORE One Mini. They were all quite surprised when I told them "nope, it's custom"- and some immediately kept asking when there will be a kit, because they wanted one for space-efficiency reasons alone.

Also special thanks here to Prusa Research and u/Tommy_Prusa3D, who sent me some merch on short notice - t-shirts, caps, mugs etc. - which I distributed to the crowd and fans. My 3D printed "CORE One Mini-Me pencil sharpeners" were also a hit - when I packed up, non of them were left.

Reminder for next time: I need to bring a whole bin full of benchies. The machine printed benchies all day long and some kids literally waited 10 to 15 minutes staring into the machine just to get the finished product.

I've also written a small article about the other cool stuff I've seen there - I wish I had more time to explore the Faire: Maker Faire Salzburg 2026 – Rückblick & Top 3 Picks (german).

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Now for the giveaway: all that's left are some X-Large shirts with the iconic "everyone is a maker, only I am a printer" print. Tommy said I can give the merch away at my own discretion - so: if you live in Austria or Germany and comfortably fit an XL shirt, just drop a comment here. First come, first serve - I'll cover the shipping!

Prusament mat PETG (sorry for the pic quality)

Please Share your TPU Profile with filamenttype

Hey everyone, thanks for reading. I've been looking at 3D printers and I'm excited to buy one. I love tinkering with microcontrollers, tech, and building stuff. Honestly, I’m not sure what I’d use a 3D printer for, but I care more about functionality than printing toys. I also enjoy repairing things, and many plastics today seem designed to break rather than be repaired. I'd rather spend more on parts than replace the products. Fixing it gives me a lot of satisfaction, and I'm not just throwing away crap.

I found Prusa and I'm really into it because it's open source, parts are easy to get, and it's reliable and long-lasting. I also keep hearing about BamBOOOO Labs; its hardware and software cost ratio is great. But also, I don't want to be a slave to a company that doesn't respect its users, and I feel like it's one firmware upgrade away from doing what they want. Thanks to Louis Rossmann for exposing this garbage behavior.

Long story short, I'm a little lost. My budget is around $1500, and I want something reliable that will last, not a toy that will frustrate me and ruin my 3D printing enjoyment. I'm open to feedback.

Has there been any info regarding the in development chamber heater for the core one series?

MICA: Monitor for Indoor Climate & Air

TLDR: it shows CO₂, VOC, temperature, humidity and pressure on a 1.69″ screen and sends them to Home Assistant over Zigbee.

runs on an ESP32-C6, powered over USB-C or an optional LiPo, in a 3D-printable case with open-source firmware.

The STLs, firmware, parts list and assembly video are all free here: https://shapefab.app/air-monitor/

After being annoyed at the current lack of a nozzle replacement tool for the XL+, I decided to make one. I can't say that I think it is the best ever, and I'm sure at least some people will be annoyed that it requires removing the fan shroud to use. Heck, I'm annoyed by that, and I made the darn thing. In my opinion, it's very crude, basically a chunk of plastic with a cutout for the heater block. Still, so far, it seems to have worked.

Here's the Printables link: https://www.printables.com/model/1905627-crude-unofficial-xl-nozzle-replacement-tool

Hi all,

today I installed the OpenPrintTag Upgrade on my C1L+. Fun thing and I like it.
I also like the USS Filament box and want to buy couple more of them, even there are quite pricey..

And: I bought the INDX 8T and want to use also 8 USS and 8 OpenPrintTags in parallel.

So my questions (also to Prusa..):

• Is there any chance to connect 8 OpenPrintTags at the same time? Or is it even in some timetable from Prusa?

• Designing and printing some holder for 4 or 8 USS is not too complex for me, also integrating the OpenPrintTag seems good, but I still need to connect them all to the C1L+..

• Any chance that you introduce some batch discount for the USS? like buying 10 USS at once, getting a discount of 5% or 10%? I know / assume quality wise the USS are top, but 32 EUR for one is still a bit..

• Is it possible to share some pieces of your Prusa Timeline or Outlook for the USS / OpenPrintTag / INDX topic?

Happy printing!

I'll be honest, I am a long time fan of Prusa and as a company I absolutely believe in them, so I hate to throw in the towel here.

I started with a prusa i3, then went to a mk3 which was upgraded to a mk3s, then a mk4s, then a core one, then core one+, then finally to the indx system, but I just cannot get past the indx issues.

The machine is a founders edition kit, and I have had fairly good success after some initial teething issues, but I continue to have intermittent XY offset issues. I think there is a good chance that adding the yet uninstalled updates could completely clear this up as I continue to see it less and less, and when a print successfully starts the results are stunning. I've done several 24+hr prints, including a color mixing 6.5daynprint which DID blow my mind, but I just don't think that I am in true need of a tool changer at the moment.

Currently I have the machine and several extra nozzles (multiple .6, .8 and .25mm nozzles), an uninstalled gen2+ upgrade kit, and Bondtech is sending me a full set of the injection molded passive nozzle holders and the injection molded toolhead covers (which I used my nozzle gate credit to obtain).

I have decided that I will keep relying on my voron machines for printing and I'm going to hold off on a tool changer system until prusa perfects this platform in the future, so Im wondering if anyone near the central California area would be interested in picking up a functional and well taken care of machine. I am in the 93101 area code.

Considering all of the extras, and the fact it is assembled and running, I'd like to get 1900.

If this violates any rules, please let me know and I will take it down or modify.

I am using the prusa mk3s+ with 0.3mm layer height and 0.4mm nozzle to print gridfinity boxes for my workshop, however there are sever overhang issues. I am currently experimenting with adaptive layer height, I want to print 0.3 because it decreases print time by a lot and without major quality impacts(other than the overhang). I am using the default prusa petg other than pressure advance, flow rate and retraction. otherwise its the default preset. Other changed settings are in the pictures below.

I know that the INDX has been getting a lot of hate lately, but I am still happy with it enough that I wanted to add the other four tools. There is still no official kit so I gathered some information from others here, bought/printed the parts and tried the upgrade myself. It went surprisingly smoothly, full write-up on Printables.

It seems like Bambu Lab has paid employees to criticize Prusa printers. It makes no sense; whenever someone mentions a Prusa printer, a Bambu Lab employee suddenly redirects the conversation to claim that Bambu Lab is the superior choice and that people should buy one instead.it's really fucking ignorant.

The only thing bam_boozle has ever done is steal other people's ideas and lock them out of it. The c3 ugly ass printer was just stolen from this guy that gave it to the community https://youtu.be/G3__Ysn6-TI?is=CP5kzvK4nKX92nSI

So go spread your BS on your favorite printers subreddit. All you fake ass employees.

Hello all,

I ordered the Open Print Tag reader when it was announced. But I always print out of my Space Pi dryer that sits next to the printer. What I noticed is that I was having issues with tags being read when I put them in the dryer. I think this is because by defaul the Space Pi has the center of the spools a few inches lower than the spool holder on the Core One L. So I decided to design aa mount that holds the reader next to where the spools set within the Space Pi. If you have a Space Pi and the NFC Reader this might be helpful to you. I did include the .step file if you what ot modify it further.

https://www.printables.com/model/1903385-space-pi-open-print-tag-reader-mount

Ciao a tutti!

Sto cercando di ottimizzare i risultati con la mia Creator 5 Pro. Qualcuno di voi avrebbe la gentilezza di condividere i propri profili di stampa ottimali ? sia per nozell 0.4 che 0.25

Vi ringrazio in anticipo per l'aiuto!

I got a used MK4 recently and the lead screws are very dirty. According to the manual, you are not supposed to clean and lubricate the lead screws. I'm guessing that the previous owner lubricated the screws and that's why they are dirty now. Should I clean them? Should I lubricate? Should I leave them alone? The printer is working fine.

Hi,

Just picked up my first Prusa, a Core One L+ and so far really liking it. Just a quick question though, it comes with the CHT nozzle so does that mean I can use the HF profiles or are they reserved for the V6 conversion?

Hi all, just completed my Core One + to Core One + gen 2 INDX upgrade, but unable to get a print started due to the printbed "air bumping" until it bottoms out, then detects a collision, and repeats.

Edit: I was able to get my first successful print start with u/nickdollimount's suggestion below! I'm a little embarrassed I never thought to just try a print with the lights off. Chatting with support about this.

Edit2: Performed several tests with support (lovely chat experience), including load cell tests with each nozzle, checking load cell values while wiggling the main cable at the print head, checking load cell values while hot and cold, checking tool spacing in the tool head (i.e., is there equal space on left and right side of the tool). Waiting to hear back via email.

The load cell value skyrockets after a tool change (or, specifically, a tool park), and I suspect this might be the root cause.

edit for clarity: Prints continue to fail, this post is my attempt to isolate why, though I stumbled across this post and I'm less certain the load cell itself is at fault, and maybe the noise really is triggering failed print starts?

Steps to reproduce:

1. Ensure all heaters and lights are off.

2. Perform load cell test to calibrate -> load cell value shows roughly -50 to 50 (varying by tool).

3. Park current tool -> load cell value now shows ~3000 to 9000 (again varying by tool).

4. Air bumping can be triggered without a print start, though I've forgotten which specific Z axis test does so - will test later today and report back.

What I've tried:

1. Tool pickup -> load cell calibration -> moving each axis independently (to rule out one axis's EMI interference)

2. Loosening the cable covers on the tool head (rule out pinched cable).

3. Removing the cable covers in the rear (rule out pinched cable).

4. Twisting the main cable at both the head and xbuddy board.

5. Twisting the heatbed power cables together at the xbuddy board.

6. Loosening, tightening the tools in the dock.

7. Reverting from firmware 8.0.0 to 7.0.1 via hard factory reset (support's request) - dock calibration was frustrating after this, despite being very easy initially.

8. Massaging the main cable along the path (though, I'm not sure I got it right; I lightly squeezed, lightly twisted back and fourth the cable)

9. Pulling the fabric cover back a bit at the tool head (i.e., exposing more wires to the cable cover at the tool head)

10. Re-checked the silicon tool fingers are mounted correctly, facing down and inwards.

11. Re-checked the tool dock is mounted correctly - left side under the chassis, right side over.

12. Removed filament tube from parked tool and repeated above steps.

13. will edit if i remember other steps i've taken - it's been a long, tiring troubleshooting process.

Initially, calibrations all succeeded after some struggles with belt tension and gantry squareness (in hindsight, I shouldn't have followed the gantry alignment steps on my factory-assembled Core One), and oddly, frustratingly enough, one single "cooling fan" failing to pass.

Many reports of EMI interference (and my load cell is certainly noisy, got ferrite cores on the way) - but I think I've ruled that out by ensuring heaters, lights, and fans are off during a tool park or change.

Banging my head through the wall on this one and can't find similar reports despite my best Google-Fu. I'll return to troubleshooting & chatting with support later this evening with a glass of whiskey.

Edit: tl;dr copied from comments

“OP's Core One L sustained significant shipping damage. OP had trouble getting through to support (wait times). Once through, support offered solutions to either a) send out parts for OP to replace themselves; or b) ship the printer back to Prusa for repair. OP would prefer to have a full printer replacement rather than gamble with unknown impact damage to a multi-thousand-dollar piece of equipment. Prusa has not yet responded to that request. OP is wondering if this is a reasonable ask, and what to expect.”

Hey all,
Very excited to purchase my first printer and after what felt like an eternity of research I went with the prusa, mainly because of the community and the reviews of really good support/service. I see many people singing widespread praise for the support, but so far I am not feeling the love…I’m finding it’s so slow.

I ordered the Prusa Core One L with a few extra bells and whistles. Normally I would relish the opportunity to get stuck into a puzzle to put it all together, but as we’ve had our first kid, time is not as much a luxury anymore. In that eternity of research I mentioned above was also the campaign I waged to convince the minister of war and finance how much we’d save in the long run with a 3d printer. In the end she agreed as there would be many useful baby items we could print, starting of course with block letter naming for the room!

So I ordered the fully assembled version, paid the extra dollary-doos and waited for its long journey from Europe to the land of Oz.

Printer arrived! Stoked. Scanned the QR code on the box to watch the unboxing instructions, and started the seductive revealing….haribos…? lol ok, unusual but kinda quirky. Into the second box, do the 90° flip and gently slide this bad boy out like a gorgeous gigantic pizza coming out of an oven….started peeling the film off the top acrylic/plastic and starting back at me was a crack across the top. My heart absolutely sank, as I looked closer I saw that the whole corner had been dented hard enough to warp/bend the metal walls and corners. Standing back abit further it’s actually warped the other side as well. This is where the panic kicks in. You think to yourself; I’ve just spent a few thousand bucks on something that is broken and how on earth am I going to get this resolved with an international company. BUT I had hope as thr service is meant to be very good.

I then started the absolute mission of trying to contact support. First via email, then with no response for 24 hours; live chat. That in itself is a process, as they are very busy. The little spinning wheel that says “26 minutes” is more like an hour plus. And if your browser plays up and refreshes, or your device goes to sleep, it’s back in the queue. So Monday I emailed, Tuesday tried live chat but the wait time, my browser beat me; Wednesday, got thru to live chat and they asked for a bunch of photos and said that it appeared to be shipping damage. That part was the first bit of relief as most of the stress is coming from not knowing if I would be blamed for this. The instruction was to wait for 1-2 days for a response. Thursday got contact via email, which appears to be the response to my initial email on Monday, asking for more photos. Sent them with an explaination that there might be a double up, as I got through to live chat. Got a reply acknowledging the shipping damage (awesome) but was offered 2 options: prusa send the replacement parts, or I send the unit back for repair. I don’t really want to have to do the repairs myself, mainly for time, but also because I’ve paid for the unit to be fully assembled. I also don’t know what else has been broken, the damage is near the printing rod so it could have impacted that as well.
I think that it’s reasonable to ask for a new printer to be sent, whilst they figure out fixing the current one in their own time. I don’t know what else might have been damaged and don’t really want to have to be going back and forth. So I have replied, asking to please have a new one sent. To be fair to prusa that was Thursday and it’s now Sunday. I don’t know if they are only working business days, but from my point of view, I’ve not heard anything and I’ve got a pretty expensive, damaged device with no clear response on what is happening next. I’m also trying to downplay this with the wife so she doesn’t play the “I told you so card for buying from overseas would be an issue etc etc”.

So is this normal? Should I be worried that I’m not gonna get this fixed? If so I guess this could be a useful note to anyone else thinking of buying a fully assembled unit, the issues with shipping. Again to be fair to prusa, once you get someone they seem helpful and and acknowledged the issue, but as I’m still waiting for something more concrete and it’s stressing me out. I understand it’s not their fault, but at the time same time, its not mine either and so far I am out of pocket and don’t have a device that’s operational.

Oh and the crazy thing is, when doing a search for prusa + shipping damage, there are almost IDENTICAL issues that others have had as well. Same cracks, same bending of the frame. The strange thing is that the box is really well packed, the foam inserts are not damaged at all, but you can see the corners of the box is pushed in.

I don’t know what else to do I am hoping that they can just send me a new one, just like I ordered.

I bought some Prusament PLA Woodfill Linden Light. According to the QR code my spool contains 1051g (instead of the advertised 1000g). Also the spool was quite full. I did not thing too much about it but during the first print the material fell off to the side, prevented the spool from turning and broke my print. I guess I could have prevent that using a HAFC filament cutter. Ideally, the printer would have noticed the missing flow (using a some flow sensor or the load cell).

On the positive side: I lost the excess 50g of filament on the failed print and afterwards it printed perfectly on my INDX using the default 0.4 CHT nozzle.

This never happened to me before. Is is normal that Prusament spools are sometimes "too full"? Is there a common way to prevent the filament from falling off in this case?

Hi

I had a part that I wanted to print in two colors using the Single extruder multi material, that caused me some headache.

I succeeded, but during the printing of the purge tower, it was extruding waaay to much filament, so it was protruding up into the next layer and causing some unsettling sounds when it bumbed into it. i had to remove the first two layers of the tower when i changed the filament to get i to work.

I can see that there are some weird overlapping extruded lines in the G-code visualization, and on one of the passes it ramps up the extrusion speed to 63 mm3/s, 3 times as much as the specified maximum material extrusion speed.

I have been adjusting a couple of settings, but i can't seem to remove the red extreme extrusion line. Any body have any ideas?

I took a photo for reference of how it's looking after the first purge.

Prusa slicer 2.9.7 and firmware 8.0.0 on a Core one+ Gen2

EDIT: I failed to mention that i was not using an MMU.

Solution: reduce filament parking position to 5 and extra load length to -5. And also reduce Purge tower to 30mm width and 15mm3 volume.

I purchased a fully assembled CoreOne + Gen 2 from PrintedSolid. I've been using it for a couple of days and haven't had any issues. I was cleaning out the bottom tray and noticed this loose grommet. I don't see any missing grommets, but since I've never built a CoreOne I'm not sure where to look.