Bad second layer, first layer prints awesome - How do I print this? (Printing help)

Great news

ssill2 — Thu, 09 Sep 2021 10:02:38 +0000

Glad it’s working now :)

works now

amish_rabbi — Thu, 09 Sep 2021 02:40:34 +0000

Tore down the Y axis and redid it and it works fine now. I must have messed up something in my initial assembly

Rule dout

cwbullet — Tue, 07 Sep 2021 14:39:06 +0000

Then you have ruled out one of the possible causes.

Posted by: @amish_rabbi
re-reading I wasn't clear but I moved the literal spool to a different printer and printed the file and it was fine.
I ended up tearing the Y axis down and putting it back together just in case and it's printing a similar file now so we will see how it goes

drying

amish_rabbi — Tue, 07 Sep 2021 14:13:52 +0000

re-reading I wasn't clear but I moved the literal spool to a different printer and printed the file and it was fine.

I ended up tearing the Y axis down and putting it back together just in case and it's printing a similar file now so we will see how it goes

drying

ssill2 — Tue, 07 Sep 2021 11:45:12 +0000

yes drying could be possible. that was well before I had gotten a filament dryer.

Filament drying

gkPrints — Tue, 07 Sep 2021 11:31:07 +0000

I had the same issues recently and I think drying the filament helped.

pla

ssill2 — Mon, 06 Sep 2021 18:02:51 +0000

I saw a similar issue using some black PLA ages ago when the print had a very large flat contact surface with the build plate. I'm trying to remember what I ended up doing to fix it. I think it ended up being a cooling issue. I've not tried to print that same part since but I felt like it was probably the particular brand of filament. I've not seen the same problem on any other prints since then either.

Re:zoffset

amish_rabbi — Mon, 06 Sep 2021 17:56:48 +0000

Yes I know that, this is my third printer. I set the Z the same way I do for my other printers that run fine. I assumed it was Z at first and spent a few days playing with the Z height and printing. I’ve ruled that out as the issue.

esspecially considering that while trying to fix this I replaced a different printer heat break, reset my Z offset and successfully finished this print in one attempt

RE: zOffset

ssill2 — Mon, 06 Sep 2021 17:48:23 +0000

zOffset is particular to that printer + build plate combination at a minimum. In my experience the material type can often require even a minor adjustment. I have two prusa-assembled MK3S+ printers. the zOffset for the same sheet+ material is quite a bit different between the two(by like .450). Definitely take time to do a 75 or 100mm 1 layer high(.2mm layer height) square with each type of material you will be printing with and figure out the numbers for each printer.

Setting up steel sheet profiles can help a lot if you switch materials and/or plates a lot. Here's how to set them up.

https://help.prusa3d.com/en/article/steel-sheet-profiles_1955/

Once these profiles are set up, the live z adjustment will save to the selected profile.

First layer is smooth?

amish_rabbi — Mon, 06 Sep 2021 15:09:46 +0000

Posted by: @dan-rogers
"the first layer prints beautifully" - not so much. Wavy like water means the following:
Z is too low, nozzle is dragging in the first layer, accumulates blobs of filament that then ease into the print in the later layers - causing a mess, possibly a blob of doom.

Sorry you are going to have to explain the first layer comment? I posted my Z height set as the third picture and it’s smooth ect. The same way I set my other two printers which are running fine

i did spend a bunch of time setting my Z until it was just barely at the right height starting from too high and working down thinking it was something like that but that didn’t make a difference