[Ultimaker Cura 5.1 - Software slices layers in empty spaces]

That's what i did, loaded your model,clicked on it and in mesh tools click fix normal's

[Ultimaker Cura 5.1 - Software slices layers in empty spaces]

seems to be a problem with the models normals in that rectangle section,useing cura's mesh tools to fix normals 

sorts it,

 

PI3_1612988591_XP_.3mf

[Custom Filament doesn't use temperature]

in your custom profile, make sure the material/temperature settings have no fx on the left of the temp.

 

And there is no reason you cannot heat bed and extruder at the same time, depends on what you have in the machine/start code

.

[One layer is printed inverted (print air instead of part)]

Tried your project file on cura 4.13 windows version and it sliced perfectly so not sure whats happening on your end.

 

[Help. Slicer Create Random Wired Lines]

In your machine settings, the gcode flavour is set to 'bits from bytes' setting this to marlin gives a good slice.

Not sure what firmware you have installed on your printer.

[z seam position]

Even more strange, when i slice your stl with my profile, hide seam works ok as well.

PI3_WINGTEST_profile3test.3mf

[z seam position]

Changing 'seam corner preference' to none  seems to help keep the starts on the same corner

[loss of interior structure]

That profile will not work with the newer versions of cura, what version are you using.

Best if you send me a profile from your cura and i will see if i can tweek it for you.

With the stl loaded into cura do a file/save project and post or send me the .3mf 

[Speed modifier for the part with a small radius]

In the cooling section try changing

minimum layer time and minimum speed

[How to perform operations on cura gcode variables?]

Not possible atm

[Cura not using Relative Extrusion]

Remove the M82 from the printers start code in printer management

[Problem: Cura 4.12.1 doesn't have a consistent direction to draw the brim?]

can't explain why, but setting surface mode to 'both' seems to solve the problem.

 

[In Cura (older version) I print much faster than in Cura 4.11]

Using ver 4.10 i get 6 hours 46 mins 

 

[I tell ya this is getting frustrating. Can't print a simple Pepe?]

Slices perfectly with print thin walls ticked  and surface mode = surface

[Remove (or avoid printing) top layer]

Can you attach the stl pls.

or even better, the project file (file/save)

[Internal Supports missing first layer]

Setting the 'support Z distance' too 0 will start the support on layer 2 instead of layer 3.

 

[floor missing, slicing issue also near wall]

playing about with line width and number of lines almost sorts it.

Using the cura arachne engine completely sorts it.

 

[Cura slice problem]

model normal fixed via cura mesh tools

 

PI3_studna.stl

[G Code Print Speed Slower Then Requested Print Speed]

16 hours ago, burgs04 said:

Also how do I change the Z axis speed?  It's at 3mm/s at the moment.

This is set by the Z hop speed

[Cura starts fan cool at L2 instead of L4]

1 hour ago, Ch3vr0n said:

Aha, so the first 3 lines should be 100/0/100?

I think thats right, all tho i have not tested it yet.

[[help/question] cura setting]

Sounds about right for size of the print

[Cura starts fan cool at L2 instead of L4]

If you mouse over the initial fan speed it explains that the fan is incremented from 'initial fan speed' upto 'regular fan speed' from layer 1 upto 'regular fan speed at layer'4

So to have no fan upto layer 4 you need to set 'regular fan speed' to 0

[Gaps in print between main body and walls]

as well as having 6.5 retraction, you also have 0 retraction extra prime.

On my direct drive system i use 0.7 retract and 0.2 extra prime.

The extra prime help overcome any ooze during travels

[Gaps in print between main body and walls]

wanhao duplicator i3 plus x.   is this a bowden feed or a direct drive extruder ?

 

[Out of Order Printing of a Disk with Concentric Circles]

Strange, loading your project into cura 4.8, both discs print from inside-out,  but not in ver 4.9