Prusa3D Forum - Recent Topics

CoreOne+ - Teplota uvnitr komory je moc vysoka

Honza — Tue, 21 Apr 2026 14:28:09 +0000

Zdravim, resim problem s tim, ze pri tisku PLA mi teplota komory vystoupa moc vysoko kdyz mam zavrene predni dvirka. Prusa tvrdi, ze to jde v pohode tisknout i se zavrenymi dvermi, no tiskarna po hodine tisku dokaze mit uvnitr klidne 40 stupnu. Horni vent je samozrejme otevrenej. Mate s timhle taky nekdo problemy? V mistnosti kde je tiskarna mam 20 stupnu teplotu vzduchu, kdyz necham regulaci teploty uvnitr komory na tiskarne tak proste dlouho nic neresi a az teplota trefi presne tu hranici tak sepne ventilator na max a tiskarna huci jak kdybych sedel nekde v serverovne ktera bezi na max, neda se u toho vubec vydrzet. Pri otevrenych dvirkach to uz jakz takz uchladi, ale stale to neni nic extra, nic to ale neresi, protoze tiskarna je pak hlasita jak 🤬. Pomuze mi trochu rucne po zacatku tisku natavit ventilatory komory na 40%, na tuhle rychlost jsou asi stejne hlasite jako tisknouci tiskarna a ta to moc nerusi navic. Vecne na to ale zapominam.. Zkusil jsem tak pres ChatGPT at mi udela nejakej custom G-Code ktery bych si pridal k filamentu ve sliceru at mi po zacatku tisku nastavi otacky na ventilatorech na 40% protoze tohle nastaveni v nastaveni filamentu neni, tam se da jen nastavit teplota komory. G-Code nefunguje, GPT vraci blbosti a vari z vody. Laborovat s tim tady se mi moc nechce je to silene na dlouho. Da se nekde najit seznam G-Codes pro CoreOne at vim co jaky prikaz presne ovlada at si to kdyztak napisu sam? Popripade dokazal byste mi to nekdo napsat? Diky

Print Ridges and Imperfection Cleanup

Rdevine — Tue, 21 Apr 2026 13:36:11 +0000

I am printing a large object for 2 days now. Im noticing some large ridges and noticeable imperfections. Curious what settings i should be looking at to ensure these are removed? Is there something obvious Im missing?

Layer Shift when using Spool Join on XL-5T

adodesa — Tue, 21 Apr 2026 12:00:52 +0000

I have seen a few posts talking about the Spool Join creating artifacts or getting the wrong Z-Height.

In my case, it has produces a very prnounced X-Y layer shift:

It has worked fine in the past, this is the first time I have noticed. This is a multi-part print and all the parts showed identical layer shift. All heads where calibrated when the printer was setup and nothing has changed since then (at least intentionally).

Any ideas besides "Try running the X-Y calibration again?".

Thanks.

Wipe tower is printing too fast.

Astor Brochs — Tue, 21 Apr 2026 11:53:52 +0000

Hello fam. I have enountered a problem i'm sure someone has had before me. While printing rPETG on the XL i noticed uneven cooling showing infill trough perimiters. To fix this i installed the https://www.printables.com/model/1013592-xl-fan-shroud-360deg/comments . It became a lot better on singel tool print, but on the wipe tower it does not have cooling power to keep up with the purging over the "max volumetric speed" causing a bit of a mess.

How do i overcome this? I wish to enforce "max volumetric speed" also on wipe tower. Or any gcode patch...

I have calibrated temp (235c) and speed (10mm3/s) for this addnorth rPETG. On stock nozzles.

"Extra flow for purging" not possible to set under 100% ?

Adjusted wipe tower accel control down to 250 it got better, but still fraying in the center and way to slow for production.

There are another post on the same subject with no replies. https://forum.prusa3d.com/forum/english-forum-general-discussion-announcements-and-releases/how-to-create-custom-g-code-to-modify-the-print-speed-for-the-wipe-tower-for-multi-material-prints/#post-336277

Thanks for reading, have a nice day.

MMU2S firmware flashing - device not detected?

RobertSRiley — Tue, 21 Apr 2026 10:17:47 +0000

Hi everyone,

I’m trying to flash firmware to my MMU2S for the first time, but the control board is not detected. RAMBo flashes fine, but MMU2S shows:

“MMU 2.0 Control device was not found (VID/PID 0x2c99/3 or 0x2c99/4)”

I tried reset button, different USB ports, and both Windows/Linux, but still no luck.

Has anyone fixed this issue before? Any suggestions?

Thank so much! Help me!

Update to Prusa app for NFC

DMartin — Tue, 21 Apr 2026 09:40:12 +0000

A useful update it seems, so I tried to "create a new NFC tag" and you can see part of the result in the photo. There's an impressive inventory of manufacturers and types. It's also easy to enter the weights, just touch on the edit symbol. BUT the TAGs ?? !!!

In this case (Centaur PP white) the given tags are (a) wrong and (b) uneditable.

I'm happy to be corrected, but that's what it seems to me.

Old Removed Printers Cause Error message upon login when they are not found.

bryn51 — Tue, 21 Apr 2026 00:17:27 +0000

I once had 4 printers, but sold two of them. I removed them from prusa connect. But ever since that day, when I log in (web) to Prusa Connect, it comes up with several error popups "Error Printer not found or does not belong to the given user".

Clearly Prusa Connect hasn't got the memo about those printers and still thinks I have them, tries to find them in my list of current printers but faiis. I searched everywhere for a reference to those old printers to amend the list, but nothing. Seems clear that there is an error of logic in the opening screen code somewhere. Or a missing page that would allow the user to see and amend the list of affiliated printers with the current login. Or perhaps a deficiency that occurs when a printer is removed, not completely removing all related data. I'm just guessing.

Whatever is the cause I suggest that its annoying to users, and ought to get some attention.

Axis Measurement Failed

cavamania — Mon, 20 Apr 2026 23:00:28 +0000

I recently received my Core One L last week. Today I noticed that before printing it will sometimes report "Axis Measurement Failed" and repeat the X/Y Homing step (the part where it bangs the head in the corner) more than once. The prints finish without issue and seem to be pretty flawless.

Is this normal? I'm curious if this just means I need to tension the belts or maybe track down some other issue.

Prusa i3 MK3S+ hot end

Martha Rykala — Mon, 20 Apr 2026 22:04:43 +0000

I have a I3 printer that I purchase in 2021, is there any benefit to be had in installing a new ED3 Prusa V6 hot end as it look identical to what I have? The Rapid Heat CHC V6 Hotend Ceramic Heating Core Bimetal Heatbreak Copper Titanium replacement hotend look like a better design but not enough to warrant a lot of modifications to make it work.

Firmware language selection

massey7746@gmail.com — Mon, 20 Apr 2026 21:23:07 +0000

How do I select just English on firmware upgrade. the language selections are english-polish, english-russian etc. None are only english?