Need Serious Help Fixing My Profile [pics]

[KJT930 0]

Hello all,

      Ive been troublehshooting for hours and im not sure what is wrong or how to fix it. In the past ive noticed these issues but not as dramatic, ive been away from the printer for a while and now that ive created some new files, they are all plagued with the same horrible stuff. 

 

My two main issues are that my bottom layer is absolutely horrible and seems like it is underextruding, and I always have a gap in between lines (seen in the closeup of the circle.

 

The actual first layer of every print and supports look great, and I just took apart the assembly and cleaned the nozzle, releveled, reset z offset, tightened everything up.

 

Speed: 125mm/s

Retraction (on): dist 6.5mm

Temp: 200c 

 

Could someone please give me some insight on how to improve this? Any Help is appreciated

 

Edited August 3, 2023 by KJT930
Converted images to jpeg

[GregValiant 1,261]

With the model loaded and Cura ready to slice, use the "File | Save Project" command and post the 3mf file here.

 

It looks like you may have an under-extrusion problem but the right side of the hole in the second picture actually looks OK.  What hot end do you have and is it a direct drive or bowden system?

[KJT930 0]

On 8/3/2023 at 8:40 PM, GregValiant said:

With the model loaded and Cura ready to slice, use the "File | Save Project" command and post the 3mf file here.

 

It looks like you may have an under-extrusion problem but the right side of the hole in the second picture actually looks OK.  What hot end do you have and is it a direct drive or bowden system?

 

The machine is an FLSun QQ S Pro, and is %100 stock. Ive only added a filament hanger with bearings to reduce friction. So this has a bowden tube, ive just put in a new bowden tube and nozzle yesterday but the issue persists. 

 

Im not sure what the stock hot end for this machine is.

 

Attached is the 3mf file

FQQ_Carb Mating Surface Left.3mf

[GregValiant 1,261]

Under-extrusion has several causes but the second most common is that the "E-Steps" are not calibrated.  It's important that when the gcode asks for "X" amount of filament that the extruder pushes exactly "X" amount.  There are lots of UTube videos on how to do it.

The most common problem is a badly leveled bed.  It can make a first layer look horribly under-extruded but really the gap is just to tall for the amount of filament being put out.

 

I don't see anything odd in your settings.  I have a thing about keeping the Speed consistent (so the flowrate stays consistent) but that's personal preference.  (I don't think it's the problem, I just thought I'd bring it up.)

 

You look to have a lot of stringing on the first layer.   When you have the "Max comb distance with no retract" set to "0.0" there are no retractions.  Make that setting 10mm.

The "Retraction Minimum Travel" at 0.8 is pretty low.  Set that to "5" for now.

 

That part would print a lot easier if you ignore the bottom bosses and make them 6 separate "glue at assembly" grommets.  There would be a lot less post-process cleanup.

 

Edited August 6, 2023 by GregValiant