|Ultimaker Cura 5 introduces a new slice engine. The impact of the slice engine required print profiles within Cura to be slightly adjusted. Although print profiles have been updated, we aimed to keep printing results between the Cura versions equal. The print profile changes are applicable to all Ultimaker 3D printers and materials, unless noted otherwise.|
Note: The new slice engine has additional print settings that can be adjusted to tweak the print strategy, read more about them here.
New variable line width settings
The new settings available in Ultimaker Cura 5 have been optimised for all Ultimaker 3D printers, to bring the best result possible for all of our customers. The update brings uniformity to all printing profiles by setting all line widths to 0.4mm, instead of ranging between 0.3 and 0.35. This allows easier print profile management, if you have multiple types of Ultimaker printers available.
- All line widths in the 'quality' category are set to 0.4mm
Wall thickness & line count
The line width the printer users, has a direct impact on the thickness of walls, because they are a multiple of the line width. In previous versions of Cura, the line width was set to 0.35mm for the outer wall, and 0.3mm for the inner wall. With 3 walls as a default, this resulted in a total shell of 0,3+0,3+0,35 = 0,95mm.
As the new default line width is 0.4mm, the wall line count has been reduced to 2 and that will lead to a wall thickness of 0.4+0.4 = 0,8mm. This means the new profile is slightly quicker to print, with a slight reduction in printed part strength.
- The 'wall thickness' in the 'walls' category has been set to 0.8mm
- The 'wall line count' in the 'walls' category has been set to 2
The 'wall ordering' setting replaces the 'outer before inner walls' setting. The new default value is 'outside to inside', which means the outer walls are printed first.
- The 'wall ordering' in the 'walls' category has been set to 'outside to inside'
The new printing profiles take the adjusted 'line widths' and newly added 'shrinkape compensation' into account, to heavily improve the dimensional accuracy of 3D printed parts. Additional firmware improvements, ensure that the 'initial layer horizontal expansion' is no longer needed to compensate the elephants foot in 3D models
- The 'horizontal expansion' in the 'walls' category has been set to '-0,01'
- The 'initial layer horizontal expansion' in the 'walls' category has been set to '-0,01'
Scaling factor shrinkage compensation
The scaling factor shrinkage compensation has been introduced to improve dimensional accuracy of 3D printed parts. It takes into account how much a print shrinks after printing, depending on the material configured; currently only PLA, T-PLA and PETG are supported.
- The 'scaling factor shrinkage compensation' in the 'materials' category has been set to just over 100%, depending on the material used
Note: These changes only apply to the Ultimaker S3 and Ultimaker S5 when using PLA, T-PLA and PETG material.
Top and bottom flow
A slight reduction in top and bottom flow has been introduced to counter over-extrusion and improve visual quality.
- The 'top and bottom flow' in the 'materials' category has been set to 97%
Acceleration and jerk
Improved acceleration and jerk control to reduce vibrations and improve visual quality
- The 'acceleration settings' of various printed parts in the 'speed' category have been adjusted
- The 'travel jerk' in the 'speed' category has been reduced
Note: These changes only apply to the Ultimaker 3, Ultimaker S3 and Ultimaker S5.
The retraction speed of all materials have been increased from 20-40mm/s to 45mm/s. This improves the printing quality, print speed and maintainability of all printing profiles.
- The 'retract speed' of all materials in the 'travel' category have been increased to 45mm/s
The resolution at which gcode is produced for the machine has been increased to improve visual quality. At the same time, the resolution of travel moves have been reduced slightly.
- The 'maximum resolution' in the 'mesh fixes' category has been set to 0.5mm
- The 'maximum travel resolution' in the 'mesh fixes' category has been set to 0.8mm
Note: These changes only apply to the Ultimaker S3 and Ultimaker S5.