ahoeben

Looks like this is not a color difference, but a transparency difference, caused by a varying thickness. This varying thickness is caused by an uneven distance from the nozzle to the buildplate, ie an uneven buildplate. To mitigate the issue, you could try to increase your initial layer height in Cura, but it would be better to make sure the bed is actually level and flat.

The function of the "Custom >" button has been moved to the "Show Custom" link above the Infill slider.

I don't fully understand why exactly, but lowering the `Maximum Resolution` setting (under `Mesh Fixes`) to 0.2 or lower seems to fix the issue for this model.
 
See https://github.com/Ghostkeeper/SettingsGuide/blob/48b3c7902c6401cf43fffd14795947c74cd02275/resources/articles/meshfix/meshfix_maximum_deviation.md for more information about the setting

See the setting "Top/Bottom Line Directions", and set it to [45,90,135,0] (don't forget the brackets)

Actually the italic means that this is the currently selected material for the current printer/extruder. There is only one italic material at any time.

Heb je TinkerCAD al eens bekeken? Dat is gemaakt voor dit soort toepassingen:
https://www.tinkercad.com/3d-design
 
Je moet alleen wel bedenken wat je wilt maken, maar dat is met een zaag of een soldeerbout niet anders.

No, Cura does not have functionlity to specify a custom set of settings for overlaps.

I a word: no.
 
Sure, it is possible by altering/removing files, but it would be a very bad idea leading to crashes when loading project files, materials, etc, and you would have to make the same changes again when you install a new version of Cura (or when you reinstall the same version, for that matter).

It is a bug, slated to be fixed in Cura 5.4 as far as I know.
 
As a workaround, disable supports, then find and unset the "Remove empty layers" setting, and re-enable supports again.

In the "manage" tab (little cogwheel) of the Marketplace, scroll down to the Camera Tool and make sure it is not disabled (ie: if there is an "Enable" button, click it and restart Cura).
 
With the Camera Tool plugin enabled, rotating the camera should be dragging with the right mouse button. No keyboard modifiers necessary.

Try this:
 
from UM.Application import Application Application.getInstance().getPreferences().getValue("cura/currency")  
Preferences is the class, Application.getInstance().getPreferences() returns the single instance of that class that Cura creates. In python, if you call a method of an instance, python "inserts" a reference to the instance as the first argument. Running getValue directly on the class instead of on an instance of the class means that the reference to the class ("self") does not get passed to the method, and instead the string "cura/currency" gets passed as the argument for "self". 
 
Will you be able to get back to your side of the street later? Or are you planning to stay on this side?

I don't think it is impossible, but it will be a lot of work and you will loose some functionality (such as automatic filament detection, printcore detection, the Digital Factory). Other functionality you will likely have to reimplement from scratch (tool changing, nozzle offset calibration, material changing).

The walls of the model are too thin. It is like you are trying to draw fine lines with a fat sharpy. Best thing to do is to make the model thicker. You can also try the following:
 
* Enable the "Print Thin Walls" setting. This will let the printer use thinner lines to print very thin parts, although they might become wider than the model intends them to be.
* Reduce the "Line Width". If you're printing something that has thin walls or webbings, make sure that the line width is slightly smaller than the minimum width of that part. However reducing the line width too much may cause underextrusion due to insufficient flow. To be able to reduce the line width further, you'll need to use a smaller nozzle.
* Add some Horizontal Expansion to the print. This makes the entire model wider on all sides, including the thin parts. They become less thin that way, so that they may now be printed. This does of course also ruin any dimensional accuracy and detail of the print since everything becomes thicker.
 
 

Cura is not a 3d modeler, but a slicer for FDM printers. In other words: Cura is not meant to make edits to STL files.

What you see is the value changes you made from the profile you used, but not the values from the actual profile. That is all that is saved in the gcode file.

In the Marketplace dialog, press the cogwheel ("manage") icon and make sure the "Camera Tool" plugin is not disabled.

The reason for the limitation is that when switching extruders, the printhead may be moved to an arbitrary location (eg to prime or to wipe, or in the case of Ultimaker printers to actuate a lever) by the firmware. This move may make the head collide with previously printed models.
 
You can disable an extruder via the "configuration" selector in the top bar (where you change nozzle sizes and materials).

That's because you have installed the Sidebar GUI plugin. The Sidebar GUI plugin moves the Extruder and Material selection to top of the sidebar. All functionality of that top menu is still available, but it has been moved to an (in my humble opinion) more logical location.
 
You can disable (or uninstall) the Sidebar GUI plugin via the Marketplace dialog (see the "Marktplatz" button in the top right).

STL objects will generally not maintain their relative positions. However, you can select multiple models loaded as separate STL files and "merge" them. This will first move them together, relative to their original position, and then group them. You can still select individual meshes in such a group (eg to set which extruder to print it with) by using ctrl+click.
 
Alternatively, you could try saving multiple models as one 3MF file. 3MF files normally do keep their original location.

MeshTools 3.7.2 is now available in the Marketplace, fixing the issue opening the Cura window.
Thanks @nallath for a speedy review and testing of this new version!

The AA cores use "normal" brass (if there's such a thing). They will not wear much (if at all) if you only print PLA without abrasive additives. You should be fine, even after 5 years. You don't need a new printcore, unless your current one is giving you issues.

See the setting "Remove empty layers".
 
Interestingly, this is the fourth or so post I see about this in a single week, and this has not changed since Cura 2. Why is "everybody" suddenly trying to do this?

You could save projects with each printer selected, and open cura with one of those projects. You can save a project without a model on the buildplate.

First, make sure you make a change to both the Start G-code and End G-Code in the Machine Settings dialog. Any change will do, just as long as the Start and End G-Code are no longer the default (so making a change and then changing it back exactly will not do; it has to be different than the default).
 
Go to Help -> Show configuration folder, and navigate to the "definition_changes" folder. The (modified) Start and End Gcode are in a file ending with _settings.inst.cfg. You will want to close Cura before you open and edit the file; Cura does not notice when you make changes to the file until it is started anew and may overwrite your changes with what it thinks is the "current" version when it quits.

Hard to tell for sure without a project file (File -> Save project...), but likely candidates are "Make overhangs printable" (which should be off) and "Remove all holes" (which should also be off.