[Cerrado] Slic3r 1.39.1 Prusa Edition - Beta testing  

Slic3r 1.39.1 Prusa Edition - Beta testing

UPDATE: There is a new version 1.40.0, more here https://shop.prusa3d.com/forum/general-discussion-announcements-and-releases-f61/slic3r-prusa-edition-1-40-0-beta-t18840.html

WARNING: This version is aimed at advanced users, as it is still under development. Proceed with caution.

BACKUP AND RESET: In order to try the latest features you must have the latest settings. Backup your current profiles (path depends on your OS). Then open the downloaded Slic3r PE and click on “Help” -> “Configuration Wizard” -> Select your printers and most importantly tick “Reset user profile”, which will load the latest settings.

What is new?

All the new features were introduced in Slic3r 1.39.1-alpha, which is available for download on the Github. During internal testing, we've discovered several bugs, which were fixed in 1.39.1-beta. Therefore we strongly recommend installing the latest build (1.39.1-beta). Also please note, this is NOT a full list of all the changes in the current release, there is a link to the complete changelog below this post.

Accurate print time estimator
Knowing exact duration of your print is a feature, we’ve been working for some time. Currently used implementations across the market aren’t always accurate, sometimes their estimation is very close to the real printing time, but sometimes it can be completely wrong.

After research, we’ve decided to build upon work of David Braam (@daid), who integrated the path planner code from the Marlin firmware into his original Cura slicer. To ensure the best accuracy we’ve adjusted the time estimator code to follow rules of our derived Marlin firmware.

Each generated G-code is has a set of information (speed, acceleration and jerk limits), which are processed by the print time estimator. For our Original Prusa i3 MK2 printer we added the following G-code snippet into the start G-code of the particular printer profile:


M201 X9000 Y9000 Z500 E10000 ; sets maximum accelerations, mm/sec^2
M203 X500 Y500 Z12 E120 ; sets maximum feedrates, mm/sec
M204 S1500 T1500 ; sets acceleration (S) and retract acceleration (T)
M205 X10 Y10 Z0.2 E2.5 ; sets the jerk limits, mm/sec


Hint:
Slic3r PE is also capable to tell you the amount of used material and price of the printed object. All you need to do is open “Filament Settings” tab and fill in “Density” and “Cost” according to your filament manufacturer (example 1.25 g/cm3 and 26 USD/kg). So now you have all the information about the print you need 😉

Latest Slic3r PE estimates printing time, used filament and cost

New firmware type: Marlin
As a result of adding print time estimator to the Slic3r PE we can no longer treat RepRap, Sprinter and Marlin firmware equally. More specifically G-code M203 (set maximum feedrate) is defined in RepRap/Sprinter in mm/min, but in Marlin firmware, the value is in mm/sec.

In case you are running Marlin, please go to “Printer settings” -> “General” and change the “G-code flavor” to “Marlin”. This way you will get most accurate print time estimates. Note that official Slic3r and previous versions of Slic3r PE (1.38.5 and older) does not support the new "Marlin" firmware flavor. Therefore in case you try to load settings (profile) from older Slic3r PE or Slic3r to Slic3r PE 1.39.1-beta the software will automatically change the Marlin flavor for older RepRap (Marlin/Sprinter) and disable time print estimator for this profile.

Previous RepRap flavor is now split into two firmwares

Recommended thin wall thickness
The thin-walled objects can be tricky and in case you don't have turned on "detect thin walls" option, the integrated algorithm of Slic3r can sometimes create a sliced model with gaps or too much deposited material. Starting Slic3r PE 1.39.1 we are including hint for the optimal wall thickness according to the amount of perimeters (2 or more).

New hint for thin wall thickness

Full changelog and download links:
https://github.com/prusa3d/Slic3r/releases/tag/version_1.39.1-beta
https://github.com/prusa3d/Slic3r/releases/tag/version_1.39.1-alpha

Issues please post here:
https://github.com/prusa3d/Slic3r/issues

Latest stable Slic3r PE:
https://www.prusa3d.com/drivers/

Happy slicing!