Prusa3D Forum - Recent Topics

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

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?

Less Grid Boxes on the Bed on Mini Prusa vs MK4 in Prusa Slicer 2.9.4

eager — Tue, 28 Apr 2026 20:36:19 +0000

I've used the MK4 and there are many grid boxes within the 12 larger boxes on the bed viewing in the Prusa Slicer 2.9.4

There's only 16 large boxes in the viewer in that same Prusa Slicer 2.9.4

Are you only given those 16 larger squares when the mini-Prusa is the chosen printer?

reddit and Googled results suggest making all the sorts of settings changes but before I do that maybe it's just a matter that the mini-Prusa has such a small bed all the other squares within those 16 boxes are not needed for the mini-Prusa?

Thank you for your insights and help.

Axis test

Martha Rykala — Tue, 28 Apr 2026 15:43:05 +0000

On my initial test of mk3.5S after updating the printer, i am failing my X,Y axis test. I do not see any interference in the full travel of either axis, what can be the problem. I also noticed that during my Z axis test, the print head did not go all the way to the print plate. After topping out, the print head would only travel down about 65% of the distance towards the print bed or stopping with about 35% remaining travel. I am not sure what this means as it did pass the Z axis test.