Prusa3D Forum - Recent Topics

ABS CORE One Print Issue

Giorgio1! — Wed, 29 Apr 2026 12:00:47 +0000

Hi everyone,

I tried printing with ABS, but it started to sag/warp at an angle and eventually got knocked off by the extruder.

I’m still pretty new to 3D printing, so I’d really appreciate any advice on how to fix this.

I know ASA would probably be the better option, but for now I’m stuck with ABS.

The model I’m printing is from Printables. It’s the “2021–2024 Chevy Suburban Traffic Advisor Light Bar Mount.” Normally I’d blame the model… but unfortunately, I’m the one who designed it 😂

Getting slicer output (other than PrusaSlicer) into BGCode

OzFax — Wed, 29 Apr 2026 08:27:49 +0000

I recognise that my Mk3.5S (and my XL) need BGCode output.

And the most straightfoward way is to open the GCode output file in Prusa GCode Viewer, and then convert the ASCII GCode into BGCode.

But when I export a file from OrcaSlicer 2.3.2, it keeps crashing "Invalid ascii gcode file"

Anyone else had this problem, and how did you resolve it?

Greg

Thermal Anomaly challenges

PJones — Wed, 29 Apr 2026 04:49:38 +0000

MK3S+ (bought second hand from print farm)
Firmware: 3.14.1
I suspect they were selling it because they were having the same problems.

I replaced the thermistor and the print fan, but the problems continue. Oddly, I can get 4 hours into a 5 hour print before it crops up for the first time. Tonight, I was about 1 hour into a 3 hour print. I've double checked that the thermistor wires are above the heater wires. Still, it beeps at about 6,000 decibels and pauses. Fortunately, I can resume it since I'm printing from an SD card.

What else can I look at to rid myself of this pain?

Why so difficult to push filament through side sensor?

Malvineous — Wed, 29 Apr 2026 02:41:02 +0000

I'm not sure if I've done something wrong, but ever since I assembled my Core One+, it has been very difficult to push filament through the side sensor. It feels like something is blocking the path and I can hear a click each time I try to jam the filament in but it stops, as if it's pressing into something that moves and is blocking its path.

I moved the switch that is supposed to make it easier to push filament through, but it makes no difference. (There does appear to be less resistance after I have pushed the filament through, but it does not make it any easier to get the filament to pass through initially.)

Cutting the filament to a sharp point sometimes helps, but not always. Rotating the filament as I'm pushing it through sometimes helps. Wiggling the base of the PTFE tube as it enters the sensor sometimes helps.

It just seems to me like there's something misaligned inside that prevents the filament from being pushed through, no matter how hard you press (enough to bend the filament and put a crease in it, and it still won't go through).

Is this normal, or is it a sign that I have not quite assembled the side filament sensor properly?