FAQ - PrusaSlicer

Q: Is PrusaSlicer free?
A: Yes. It’s also open-source, so anyone can contribute to the development. Check our GitHub.

Q: Can I use it with other printers (not Original Prusa)?
A: Yes. The community has made profiles for printers from many manufacturers. Many of them are now built-in to PrusaSlicer, you can add them via the Configuration Wizard. For printers that are not yet included, you can check your printer’s Facebook group or a forum, download the profiles and import them manually.

Q: Where are user profiles stored?
Select Help - Show Configuration Folder

Windows C:/Users/username/AppData/Roaming/PrusaSlicer
Mac “HDD” ▸ ⁨Users⁩ ▸ ⁨username⁩ ▸ ⁨Library⁩ ▸ ⁨Application Support⁩ ▸ ⁨PrusaSlicer
Linux ~/.config/PrusaSlicer
If you're using an alpha or beta version, the folder name will be PrusaSlicer-alpha or PrusaSlicer-beta respectively

Q: Did an update erase all my custom print profiles?
A: No, PrusaSlicer always creates a backup of all print profiles before an update. Check the snapshots folder.
Windows C:Users/username/AppData/Roaming/PrusaSlicer/snapshots
Mac “HDD” ▸ ⁨Users⁩ ▸ ⁨username⁩ ▸ ⁨Library⁩ ▸ ⁨Application Support⁩ ▸ ⁨PrusaSlicer⁩ ▸ snapshots
Linux ~/.config/PrusaSlicer/snapshots

Q: Does it have custom supports?
A: Yes. Check the Paint-on supports and support blockers and enforcers.

Q: How to orient my model so that one of its faces is on the print bed?
A: Check the Place on Face function.

Q: Can I schedule a pause or a color change in PrusaSlicer?
A: Yes, click the plus icon on the slider in the Preview mode. 

Q: What is the correct spelling: Plater or Platter?
A: Feel free to discuss at #2074 or #1226, we're keeping it as Plater.

Q: Does it have tree supports for FDM?
A: No, at least for the time being. We are looking into how to make them work with FDM.

Q: How accurate are the print time estimates?
A: Very accurate, often less than a minute difference on a print that takes 10+ hours. However, this is only true if you select the correct printer profile that matches your actual printer. The print time estimate takes into account acceleration, jerk and other settings that differ from machine to machine.

Q: How do I import a custom profile
A: File - Import - Import config

Q: Why is there an extrusion hanging in the air over a MMU (multi-material) wipe tower?
A: That is the final ramming before the filament is pulled from the nozzle and parked into the filament switcher. See #1355 for further details.

Q: Why is the jerk unit in mm/s, if the physical unit should be the rate of change in acceleration = mm/s^3?
A: The GRBL project overloaded the term "jerk" to define maximum instantaneous velocity change, which is easier to be implemented by 8bit controllers, and most of today's 3D printer firmware is based on the GRBL planner. See #1355 for further details.

Q: PrusaSlicer won't start on Ubuntu
A: This may be due to missing package , install it using the following command:

Q: When exporting a G-code, the file save dialog shows  tag in the file name instead of the actual print time, why?
A: This happens if you click on the Export G-code button right after slicing and the G-code analysis is still running on the background. If you save the file, the tag will be properly replaced with the time estimate.

Q: Strange pattern on a flat surface
A: A perfectly flat surface may not stay perfectly flat after being rotated in a 3D modeling software. If PrusaSlicer happens to slice across such a no more perfectly flat surface, weird one layer thick islands may show up. See #2434 for further details.

Q: PrusaSlicer freezes or gets stuck after launch and is not responding (often when opened on 2nd monitor), what's wrong?
A1: This is likely caused by the Nahimic audio driver, which some notebook/pc manufacturers pre-install on their machines. You can solve the issue by stopping and disabling the Nahimic driver. You can learn more in this forum thread or on this GitHub issue page.
A2: You may be running an app that integrates with other applications, such as the Blue Cielo "Application Integration". Such apps autoload at startup and inspect/change menu bars etc. If you discover such an app on your device, whitelist PrusaSlicer. More info on this GitHub issue.

Q: How can I move a model up in the Z direction?
A: Place your base object normally, then right click on it and 'add part', select the model that you want to place on top. More information is in this article. As well as the explanation why this can't be done easier at the moment.

FAQ for other vendors:

Q: We would like to modify (possibly re-skin) PrusaSlicer and release it for our customers, is that ok?
A: Yes. However, you will have to release the full source code including all the changes that you've made. Please check the GNU Affero General Public License, version 3.

Q: We would like to use PrusaSlicer to create a cloud slicing service
A: Feel free to do so, but just like when releasing a modified version, you will have to release the full source code including all the changes that you've made. Please check the GNU Affero General Public License, version 3.