Intial Layer Horizontal Expansion not working...

[radyeus 0]

So I have been experimenting with the new Initial Layer Horizontal Expansion to get rid of my small Elephants foot issue.    I printed the 20mm calibration cube with (-0.5mm, -1.0mm and -2.0mm) settings and all three cubes came out identical still with the foot.  The width at the foot is 20.65mm and 19.85mm for the rest of the walls.   

 

Have I misunderstood the settings?

 

PS.   double checked and Horizontal Expansion is at 0mm.

 

 

 

Cura 4.7.1

Ender 3 Pro

Glass bed

 

Edited September 14, 2020 by radyeus

[GregValiant 1,251]

In the Cura preview you should be able to see that the first layer is smaller than the second layer (especially with it set to -1).

I haven't had any problem getting it to work (same printer as yours).  I keep it at -.25.  If there is another setting that could interfere with Initial Layer Horizontal Expansion I'm not aware of it (but there are a lot of things about Cura I'm not aware of).

[Smithy 1,144]

Initial Layer Horizontal Expansion works exactly as GregValiant says, it just makes the first layer smaller when using a negative value. I also use it in every print to get rid of the elephant foot. I use -0.3

[877 0]

On 9/15/2020 at 12:13 AM, radyeus said:

So I have been experimenting with the new Initial Layer Horizontal Expansion to get rid of my small Elephants foot issue.    I printed the 20mm calibration cube with (-0.5mm, -1.0mm and -2.0mm) settings and all three cubes came out identical still with the foot.  The width at the foot is 20.65mm and 19.85mm for the rest of the walls.   

 

Have I misunderstood the settings?

 

PS.   double checked and Horizontal Expansion is at 0mm.

 

Cura 4.7.1

Ender 3 Pro

Glass bed

 

 

Hi @radyeus

 

I'm finding exactly the same thing, same printer,  except with Cura 4.8.

 

When I make "Initial Layer Horizontal Expansion" positive, I see the results in Preview.

 

But making it negative, even -2mm, nothing happens with Preview, and the actual print still has elephants foot.

Edited December 21, 2020 by 877

[gr5 2,172]

Just now I tried -2mm for ILHE and it worked fine.

 

Can  you show a screenshot please?  Sometimes if the part is only touching the bottom layer a little, setting ILHE to -2 can totally remove the bottom layer which then moves the part down a layer and it may look the same as before but the bottom layer isn't printing at all now.

 

Even better do "file" "save..." and that will create a project file with your STL in it and positioned/scaled how you did and with your printer's machine settings and your settings.  All in one file so I can test it out myself.  Post the resultant file here.