Prusa3D Forum - Recent Topics

Prusa core one input port overcurrent error

Bobster — Tue, 05 May 2026 13:04:50 +0000

Hi, I have just started getting this error message on my Core One, Prusa core one input port overcurrent error, it happened when I started a print with PC filament. I have printed quite a few things with this filament and it has always printed successfully until this one. Having googled it all I can get is some long winded cure that entails taking half the machine to pieces which I don't want to do as I am confident that there is nothing wrong with it. After a few restarts where I got the same message it restarted without the error message. I decided to tell it to preheat using PLA settings and it did, so I asked it to preheat to the PC filament temperature, which it did. I then started the print that I was going to print when I got the error message and it is now happily printing away no problem.

Is anyone else experiencing this problem? I would love to find our why it happened as the error message tells me to turn off the machine and contact Prusa.

Connection to Voron doesn't work

Sebastian — Tue, 05 May 2026 07:30:04 +0000

Hello I tried to connect the EasyPrint Webversion to my Voron. But when I'm entering the Ip adress of the printer I only get: Connection error.

The Firefox app I also in chrome and with and without API key. Is there any trick? Or does this not work?

Sorry the screnshot is in german.

Thumb screws vibrating loose on Core One

cwbullet — Mon, 04 May 2026 22:09:31 +0000

Anyone else having an issue with the thumbscrews vibrating loose after several prints and the nozzle dropping and scratching the bed?

Need some help thermal runaway issue

Mikhaildg1987 — Mon, 04 May 2026 20:34:14 +0000

Need some help with toroubleshooting

Prusa i3mk3 is giving me a thermal runaway error and it has melted the heat shroud twice already. I have replaced 2 thermistors already and I still get the same issues after doing 5 to 10 prints. Here are some pictures of what's going on and I dont know what else to do. So I have tried running the paid calibration , and it fails immediately since thermal runaway. I am using overture p p l a default settings in prusa slicer version 2.9.5. It has been frightening fine for the last 3 to 4 months.And this just started happening about a month ago.

High speed settings for Core 1+

roontoon — Mon, 04 May 2026 20:05:00 +0000

Just got a core 1+ and have done several files and some of the demos that came with it. it seems that the files that came with the machine were sliced with very high speeds set which the machine seemed to handle but I don't see any of there fast setting files that the demos had. are there a set of preset settings that are available to take advantage of the machines speed. TIA.

Quick disconnect mounting plate

Josh — Mon, 04 May 2026 19:33:44 +0000

I bought a used Mk4s and enclosure and it didn’t come with the mounting plate where the quick disconnect attaches. I am gathering the pieces I need to move the psu to the outside of the enclosure. I can’t find it one the site. I don’t see where anyone made a printable version. Am I missing it somewhere on the site?

Did print fan speeds for PETG change?

JPWhitestar — Mon, 04 May 2026 19:20:14 +0000

I've been running the given SUNLU PETG filament configuration for weeks with no problem. I just did a PRUSA configuration update and now the print fan doesn't want to run correctly starting with the 4th layer. The fan looks like it starts to try to spin in fits and starts but then just shuts down. The print fan speed settings are 20% min and 40% max.

Fan check passes all its tests. Is it possible I have a fan going bad and it just doesn't want to run at 20%?

Bowden tube catches on nut on vent causing it to open and close head moves

rwb43 — Mon, 04 May 2026 17:23:25 +0000

One my core one+ the bowden tube catches on the nut on the vent slider as the head moves back and forth. So the vent will auto open but the tube will catch the nut and close it as the head moves to the right. Any documented fixes for this problem?