Summary
- New features
- New editions: CORE One+ (Gen 2) and CORE One L+
- Nozzle Wiper support, replacing the previous print-start nozzle cleaning routine
- GT1.5 belts support
- Expansion Joints Gen 2 support, with a much shorter Absorbing heat phase [C1+ (Gen 2)]
- Immediate stop on filament runout
- Guided calibration order - calibrations and tests declare their prerequisites
- Changes and improvements
- Reorganized menus - some settings have been moved to different submenus
- Filament compatibility checks in more places
- Custom filament names may contain lowercase letters
- Fixes
- Fixed not restoring original temperature on filament runout/mid-print change
- More reliable communication with the xBuddy Extension
- The last file in a folder was not visible, and related file list fixes
- The printer no longer beeps on boot in Silent mode
- An upward swipe on the touchscreen is no longer registered as a tap
- And a lot more
This is the stable release of firmware 6.8.1 for the Prusa CORE One, CORE One+, CORE One+ (Gen 2), CORE One L and CORE One L+, introducing firmware support for the hardware of the new CORE One+ (Gen 2) and CORE One L+ editions, along with a reorganization of the on-screen menus, a guided calibration order and a number of fixes.
Note: This firmware 6.8.1 is not compatible with INDX
New editions: CORE One+ (Gen 2) and CORE One L+
Firmware 6.8.1 adds support for the hardware that ships with the new CORE One+ (Gen 2) and CORE One L+ editions: the nozzle wiper, the GT1.5 belts and the second-generation bed expansion joints (non-L only, L has an AC bed). Each is described in its own section below.
The edition is selected in Settings → Hardware → Edition, which applies all of its hardware options at once. The individual toggles remain available for printers that have been retrofitted with only some of the accessories.
Nozzle Wiper
Printers fitted with the Nozzle Wiper clean the nozzle by wiping it across the wiper pad at the start of a print. This replaces the Nozzle Cleaning routine, which removed debris by tapping the nozzle against the print sheet.
Note: A wipe can also be triggered manually with the G12 G-code. The wiper is enabled in Settings → Hardware → Nozzle Wiper.
GT1.5 belts
Printers now support the new GT1.5 belts and their transmission wheels, which move a slightly different distance per motor revolution than the original belts.
The belt type is set in Settings → Hardware → GT1.5 Belts. Changing it resets the belt tuning and the XY homing calibration, and restarts the printer.
It is important for the setting to match the actual belts installed. An incorrect setting makes prints come out dimensionally wrong and causes homing problems.
Expansion Joints Gen 2 [C1+ (Gen 2)]
The redesigned bed expansion joints let the frame reach a stable temperature considerably faster, so the Absorbing heat phase before a print can be shortened. With the second-generation joints enabled, the Absorbing heat is skipped entirely for bed temperatures up to 85 °C (PLA & PETG), and for higher bed temperatures the printer expects the frame to stabilize twice as fast, roughly halving the wait.
The joints are enabled in Settings → Hardware → Expansion Joints Gen 2.
Immediate stop on filament runout
When a filament runout is detected, the printer now stops immediately instead of first finishing the moves that are already queued. The end of the filament is therefore not driven as deep into the printer, where it could get stuck and be difficult to remove.
Guided calibration order
Calibrations and tests now declare which other calibrations they depend on. Starting one whose prerequisites have not passed yet shows a message listing which calibrations need to be completed first.
Reorganized menus
A number of settings have been moved to different submenus, and the order of items within some menus has changed. Most menus now also show a header icon.
- Input Shaper and Phase Stepping moved from Settings into Settings → Hardware
- Printhead moved from Settings → Hardware up into Settings
- Lights (formerly Lights Settings) moved from Settings → User Interface up into Settings
- Firmware Update (formerly FW update) moved from Settings into Info
- Belt Tuning (formerly Manual Belt Tuning) moved from Settings into Control → Calibrations & Tests
- Chamber Fans Limit moved from Control → Temperature into Settings → Hardware
- Display Refresh Speed moved from Settings → Hardware into Settings → User Interface
- Loaded filament moved from Filament → Manage Filaments up into Filament
- The Temperature menu is now Temperature & Fans
Filament compatibility checks in more places
The checks that compare the selected filament against the printer's hardware - for example an abrasive filament against a nozzle that cannot handle it - previously ran only when a print was started. They now also run when the filament is changed from the print preview screen, and in Change All Filaments.
Custom filament names may contain lowercase letters
Custom filament names were restricted to uppercase letters, digits, underscores and dashes. Lowercase letters are now accepted as well.