[Risolto] Bad second layer, first layer prints awesome  

Wavy printing:

The first layer waving is usually:

1. Too low of a Z
2. Dirty bed

The second layer on:

1. Too high of a flow rate is what I have seen.  

Wavy like water ...

"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.

Code is fine on other printers

Posted by: @cwbullet

The first layer waving is usually:

1. Too low of a Z
2. Dirty bed

The second layer on:

1. Too high of a flow rate is what I have seen.  

Thanks but as I have said the code is fine on other printers with the same filament so it’s not that it. It’s actually the prusa default

First layer is smooth?

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 

RE: zOffset

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. 

Re:zoffset

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

pla

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.

Filament drying

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

drying

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

drying

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

Rule dout

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

works now

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

Great news

Glad it’s working now 🙂