Spaghetti corners on Gridfinity box print

Hi:

I have an A1 Mini and I love it, normally it just works great. However, recently it has been showing up a print problem on box walls. I have been printing a lot of Gridfinity storage boxes that are small (up to 4x4 size) and normally they print flawlessly, side walls are perfect.

However, recently I have been having prints fail because the inner wall line seems to get caught on the corner or something, producing a weird alien effect of random spaghettis on each corner of the box. Look like Einstein’s hairdo. They only occur right at the corners, usually within a centimeter or so of the box corner. All of the inner wall lines on the box disappear at this point, it is supposed to be a wall with a dual line, but only the outside one is present, I assume the inside one ends up in the spaghetti mess.

Filament is bone dry, I have a dual spool Sovol dryer and I run the filament out of this dryer and into the AMS bypassing the AMS spool. Printing with Elegoo PETG Rapid with a .6mm nozzle, 230C nozzle temp, 75C bed temp, 125% speed, otherwise stock settings.

Sorry I don’t have a picture, I’ll try to get one next time it happens. Recently been happening every 3-4 prints, other prints work fine. Any ideas?

MG

Without a photo, anything suggested would be a guess.

1 Like

I’ll post one as soon as it happens again, but a guess is better than nothing.

It looks like the corners of the box have grown fungus like “The Last of Us”.

MG

Sell them online like that as branded items and turn a bug into a feature!

I’ve printed about 15 of these a few months ago.
I’m gonna take a wild guess & say that the .06 nozzle is the issue…have you tried printing the same model with a .04…??

Thanks Lion:

Could be, but I have printed dozens of these with the 0.6 nozzle with no problems. Prints come out beautiful, shiny, layer lines all perfectly regular, base good with no curling, etc.

Only recently have I run into this problem, not every print, seems random. I just printed 4 boxes with no issues.

If it happens again, I will try to go back to the .4 nozzle, but it’s a bit slower to print.

MG


Just printed this, checked it at 10 minutes before it was finished, everything was perfect, then this happened right after I left the printer. GARRRRRGGHHHHH!!!

MG

1 Like

Give this a read:

Dry your filament or try slowing down the print.

1 Like

Filament is completely dry, it was sitting in a dryer at 13% humidity and 50C for over a week.

Speed might be an issue since I was running it in fast mode. I’ll try running them at a slower speed, but I thought the whole idea behind PETG Rapid was that you could print at higher speeds because it has lower viscosity at temperature. Is there some other setting I need to change to run PETG Rapid at the fastest possible speed? I’m using the preset for “Bambu Labs PETG HF” since they don’t have one for the “Elegoo PETG Rapid”.

MG

Yeah, Lion, I did read this, but I’m pretty sure this is not the problem. My extruder assembly is tight and does not move, but I’ll be sure and check on this from time to time. Only 300 hours on my machine. Thanks for your time!

MG