Prusa3D Forum - Recent Topics

Newb question: Thin internal geometry is being filtered out.

curator23 — Thu, 23 Apr 2026 19:59:45 +0000

Hi,

I'm trying out PrusaSlicer for the first time.

I'm having difficulty getting my models to slice correctly.

I often use thin gaps to build internal structures, typically around 0.01-0.05mm wide.

PrusaSlicer is filtering out these structures, and I don't know how to stop it from doing that.

Can anyone offer advice on how to do that, or if it is even possible?

Thanks,

C23

Hole size compensation parameter in PrusaSlicer, when?

MichielvH — Thu, 23 Apr 2026 19:24:02 +0000

I've been using my new Core One Plus for three months and it really is a good printer for me. Because PrusaSlicer seems to be the more compatible slicer for the Core One, I've been learning this piece of software, coming from using Ultimaker Cura for the last 9 years. Unfortunately, there seems to be almost no support for the Core One in Cura, so I think I'm sort of 'condemned'/'forcefully married' to using PrusaSlicer. The problem is that there's no way in PrusaSlicer to adjust the size of printed holes, in Cura there's the 'XY Hole Compensation'-parameter which does its job quite well. I'm missing this feature enormously in PrusaSlicer. Now I have to adjust the size of the hole(s) in the CAD model, which is kind of rediculous if you think that for CNC milling machines this workflow is totally unneccessary.

I'd plead for an option similar to the 'XY Hole Compensation' paramater in PrusaSlicer. Come on Prusa, it's already Q2 in 2026 and this desire for a hole size compensation feature in PrusaSlicer dates back to before 2020!

Linear Rail Lubrication - need more details?

Neal — Thu, 23 Apr 2026 19:03:17 +0000

I am now due for my first linear rail lubrication since I purchased my Core One fully assembled.
Where can I find better detail and photos than the Core One Maintenance page:
https://help.prusa3d.com/article/regular-printer-maintenance-core-one_829710

I tried google for about 15 minutes, and all I find is other model printers, sometimes other brands.
I have the official lubrication kit, but I can't find the needle ports on the carriage. I need a photo
or video to show me where to insert the needle into what port?

Thanks in advance for any help, mentoring, guidance.

Neal

Heatbed heater failing

Hussain — Thu, 23 Apr 2026 17:27:45 +0000

So this issue has been going on since the start. This is self-assembly kit. Here are the attempts to fix:

1- Checked with multimeter all resistances and voltages

2- Tried with Satin sheet, PEI sheet, no sheet

3- Changed heatbed cables to xBuddy Box

4- Changed heatbed thermistor

5- Fully changed heatbed assembly

After changing the FULL heatbed aseembly, still no luck. Where can the issue be? It surely cannot be the heatbed. Temp reaches 68/110C during test only.

Can it be the xBuddy? what else can I try?

Print Settings for Elegoo Rapid PETG

faye — Thu, 23 Apr 2026 17:03:20 +0000

Hi! I'm pretty new to 3D printing and I just bought these Elegoo Rapid PETG filaments to use with the original Prusa MK4S printers on campus. I ran into issues with the prints because the filament kept lifting off the bed plate and the nozzle would get stuck on filement blobs and create a mess. I was wondering if there were any special print settings I need to change for this specific type/brand of rapid PETG. I tried changing the bed temperature so that It would stay 85C degrees and that helped a bit, but still failed later on.