Failed prints after disassembly
Hi everyone,
So I had a problem with the extruder motor and I had to disassemble the whole print head... turns out the grub screw of the drive gear fell off and got stuck to one of the magnets. Anyway. I reassembled the head incorrectly at first and the nozzle wasn't aligned with the P.I.N.D.A. probe, which was a little scary during the Z-calibration... made a little dent in the bed 😱
I reassembled everything correctly eventually, started a print, first layer was ok but at some point it failed and made a PLA spaghetti plate.
Retried a couple of times, same result. I noticed that the print started failing when the angle became too steep. I thought the layers didn't fuse correctly so I made a live-z adjust to see if it would change anything. Worked somewhat better but still failed (see picture below - failed prints and older successful prints).
What else can I do? Any help would be greatly appreciated! Thank you!
RE: Failed prints after disassembly
Spaghetti on plate is usually, first layer not good and bed not clean enough.(clean with dish soap, no alcohol needed).
And give settings of your materials. And picture of first layer.
Small models, if you print 1 model at a time, on the highest point it will get to hot and not cool enough, if you print 3 models, then the models have time to cool down.
Small and big flat models, use a big brim attach to model, so model can not get loose from bed, as extra you can use glue stick.
General use how I work:
A new sheet will stick less then a used one.
PLA sticks more difficult on a powder coated sheet. Is still possible settings need to be more preciese.
This how I work on a pei sheet(there are always exceptions):
Most important to 3d printing is:
1. 3d print will never be like start and i have the print, there will always be problems!!!!!!
2. A clean sheet, use dish soap, then you can print on it. A few prints you can use alcohol, then again dish soap,
big flat models and models with small footprint on sheet- use glue stick(and not every glue stick is the same,
use one that makes a thin layer), and big flat models and small footprint, use a big brim attach to model so footprint is bigger.
Petg sticks to much on the pei sheet, use window cleaner, this leaves a layer on the bed, so it does not stick to much.
3. To get it stick very good, a 100% first layer is very important, see youtube for movie on this.
Every new print watch the first layer, and look if it is 100%, this will also prevent a big ball of filament on your nozzle wen model let loose during printing.
Extra: (normally not needed).
First layer, print hotter.
First layer slower.
Bed more heat.
Most problems are first layer to get this 100%, and bed not clean.
Bad filament is possible, or filament with water inside.
Move extruder to the top and extrude filament, it should go straight down(if not, nozzle possible blocked),
it should be thick enough(if not, nozzle possible blocked, or partial blocked), (do a cold pull),
if Bubbling during extrusion then it has to much water inside.
Check after the first layer is ready, then you see if it sticking enough, and not releasing and sticking to the nozzle.
If you see white spots like a bubble on the bed, then filament is releasing from bed.
Also no gabs between lines should be visible.
Use 7x7 calibration for first layer, see settings in the printer.
Search for " 3D printer first layer problem Calibration process" on youtube, movie on first layer calibration, with a good zoom in.
RE: Failed prints after disassembly
Many thanks for taking the time to reply!
I kept trying things out since my initial post and I managed to solve it by cleaning the bed with alcohol, making another live z adjust and tightening the extruder idler.
However, I'm sure I'll need all your precious advice one day and will definitely check back when the case comes! Cheers!
RE: Failed prints after disassembly
Clean bed with dish soap is a lot better.
You can use a few times , clean with alcohol, but then you need to use dish soap again, with dish soap it wil clean everything on the bed.
Especially models that will come loose, clean with dish soap, then it will stick better.
Good cleaning will also prevent the big ball of filament sticking to the nozzle.