Rough first layer | 3D Printing | Page 1

junior shoal Jun 16, 2023, 5:06 PM

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Hello.
I have an Ender 3 v2 neo and I am trying to print a tray with this machine.
However, my first layer is never good. It's smooth in some places and grainy with little peaks in others.
I levelled it again.
I've changed the settings slightly (filament temperature, bed temperature, speed) but I get this problem every time.
And I've always been told that the first layer is crucial.
What can I do about it?

thank you in advance for taking the time to read and answer my questions.

barren shuttleBOT Jun 16, 2023, 5:06 PM

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junior shoal Hello. I have an Ender 3 v2 neo and I am trying to print a tray with this machin...

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AI Help

Hello! It sounds like you may be experiencing inconsistent bed leveling. Even if you leveled your bed, your print surface may not be flat or even. I recommend using a piece of paper to check your bed leveling at multiple points across the bed. You can also try using a bed leveling tool like a dial indicator or a BLTouch probe to ensure the bed is completely level.

Another possible issue could be that your nozzle is too close or too far from the bed. When you're leveling your bed, make sure that the nozzle is only slightly squishing the filament onto the bed. If it's too close, the filament won't be able to come out of the nozzle easily, causing inconsistent layers. If it's too far, the filament won't stick to the bed properly.

Lastly, you can try adjusting your print speeds or using a different first layer setting in your slicer software. Slowing down your print speed can sometimes help improve the first layer adhesion.

I hope these tips help! Let me know if you have any other qu...

muted vale Jun 16, 2023, 5:07 PM

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junior shoal Hello. I have an Ender 3 v2 neo and I am trying to print a tray with this machin...

smooth in some and grainy in others sounds a lot like a bed thats not properly flat. levelling sadly just tilts the whole bed at once. i assume you dont have a crtouch or bltouch? its a sensor probe that creates a virtual map of your bed to adjust for peaks and lows

junior shoal Jun 16, 2023, 5:08 PM

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The printer is furbished with a sensor (seem to be a CRtouch)

muted vale Jun 16, 2023, 5:13 PM

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Ah excellent. Try to look up how to use that. Should be somewhere in the menu but I recommend watching a video tutorial or smth

junior shoal Jun 16, 2023, 5:17 PM

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muted vale Ah excellent. Try to look up how to use that. Should be somewhere in the menu bu...

maybe i'm wrong but it seems to me that at each print start, the print head takes measurements at several points on the platen (the little CRtouch sensor touches the platen at several points) and I haven't found anything else in the options... I take it that this is automatic and that I don't have to do anything?

muted vale Jun 16, 2023, 5:18 PM

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ah then yes that should be working. odd that it still has the first layer issue then

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do you happen to have a picture of the first layer?

junior shoal Jun 16, 2023, 5:19 PM

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I'll try to take a photo, exceptionally I left the printer running to see what would happen on the second layer (with a rough first layer).

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muted vale Jun 16, 2023, 5:23 PM

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yeah that looks rough idk whats going on there if your crtouch seems to be working as intended

junior shoal Jun 16, 2023, 5:23 PM

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:/

muted vale Jun 16, 2023, 5:23 PM

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try looking into the cr touch. i think there should be a way to make a mesh (where it probes the bed in points) outside of starting a print

junior shoal Jun 16, 2023, 5:24 PM

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yes indeed. I did that after the manual leveling

muted vale Jun 16, 2023, 5:26 PM

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then you seem to have done everything correctly. is your cooling on on the first layer?
have you already had some experience with adjusting z offset?

junior shoal Jun 16, 2023, 5:27 PM

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muted vale then you seem to have done everything correctly. is your cooling on on the first...

for the cooling : i have no idea
for the Z offset : yes

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i stopped the print, better picture

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rn_image_picker_lib_temp_724e6cbf-5825-45c2-a979-fa4d80720446.jpg

muted vale Jun 16, 2023, 5:28 PM

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ok so cooling you can check by seeing what the fan % says during a print
if its on, turn it off.

the only other two settings i can think of to have a look at are first layer line width and maybe going through the z offset adjustment again

junior shoal Jun 16, 2023, 5:32 PM

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let's do it

muted vale Jun 16, 2023, 5:35 PM

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(to be clear turn off the fan for only the first layer. If you're using Cura there's a setting for that)

junior shoal Jun 16, 2023, 5:36 PM

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i'm using Prusa and i have an option on the printer

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but the Fan speed is set to zéro

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and the fan continue to turn

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I can increase it to 255 but not cut it.

muted vale Jun 16, 2023, 5:41 PM

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thats a bit odd in its own right but we'll leave that for now because i doubt its the fan. try going through z offset again id say.
and otherwise i think ill have to leave it for someone else who has an idea?

junior shoal Jun 16, 2023, 5:43 PM

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I've modified the Z axis a little and I'm trying a print like this...

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thank you for your help

formal totem Jun 17, 2023, 6:57 PM

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junior shoal Hello. I have an Ender 3 v2 neo and I am trying to print a tray with this machin...

In my experience, rough surface is caused by the nozzle being too close to the bed. Also, this might not help, but it could be the exact fix: make sure "M420 S1 Z10" is added to your start Gcode, immediately after G28. Once the homing command is issued (G28), the printer no longer utilized the bed levelling data, so "M420 S1" recalls the last saved mesh. Also, you don't need to perform a G29 (automatic bed levelling) before every print. Z10 instructs the printer to stop micro-adjusting Z (based on the levelling data) after 10mm.

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2023-06-17_14_04_24-SSL_champagneSymmRetry1Fixed_-_UltiMaker_Cura.jpg

barren shuttleBOT Jun 17, 2023, 11:04 PM

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junior shoal Jun 18, 2023, 8:21 AM

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Thank you for your answer. I will try this tonight

barren shuttleBOT Jun 18, 2023, 9:22 AM

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junior shoal Jun 18, 2023, 7:59 PM

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OK so. I modify a little bit the Z axis and add "M420 S1 Z10" to gcode. Seem to be better but ...

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barren shuttleBOT Jun 18, 2023, 8:00 PM

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M420
https://marlinfw.org/docs/gcode/M420.html

Marlin Firmware

Bed Leveling State

Get and/or set bed leveling state. For mesh-based leveling systems use Z parameter to set the Z Fade Height.

junior shoal Jun 18, 2023, 8:01 PM

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the layer lifts in places at the edges of the print...

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as you can see on the photo

barren shuttleBOT Jun 18, 2023, 9:02 PM

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junior shoal Jun 21, 2023, 5:22 AM

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?solved

#Rough first layer