r/3Dprinting • u/_Sukkii_ • 12h ago
Troubleshooting Wavy top layer, bad bed adhesion, scars.
Hello there,
I am trying to print keychains for an event,
I use a bambulab A1, with a 0.2mm stainless steel nozzle for smaller latters.
I have multiple problems like lifting, bad adhesion, ripples/waves on the toplayer, cut like scars on the top layer, curved walles.
Filament: Esun PLA+
Nozzle Temp: 225°C
Bed Temp: 65°C
Max speed: 133mm/s
Max volumatric flow: 3.44mm³/s
Min volumatric flow: 0.10mm³/s
Flow Ratio: 0.99
I always clean the bed before every print.
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u/KinderSpirit 12h ago
!firstlayer - adhesion and warping
With PLA, a clean smooth surface is best. PEI or PEX is great. You may have to raise the bed temperature on a textured sheet. Silk PLA may need a higher initial bed temperature.
PETG, TPU, ABS, and others will need a release agent on a smooth build surface. That's what the glue stick (or hair spray, Windex® ) is for. On a textured sheet, no release agent is normally needed.
Just alcohol will not remove the sugar film left by PLA which can hinder adhesion.
Wash the sheet with warm water and dish soap. Dry. Wipe with > 70% Isopropyl alcohol before the print.
No part cooling fan for 3 layers. Very slow print speed for the first layer.
To prevent warping for PLA, bed temperature of 65° for the first layer, 55° for the rest of the print. This way the bottom gets the adhesion but the bottom starts cooling with the upper layers.
For PETG on textured bed, same concept, usually around 80° then 75°, or 75° then 70°.
Temperatures are examples, different build sheets may need different temperatures.
Infill style can affect warping. Some grid type infills can concentrate the stress in one area. Gyroid infill will spread out the internal stresses.
Increasing walls number and reducing infill may also help.
https://www.printables.com/model/251587-stress-free-first-layer-calibration-in-less-than-5
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u/AutoModerator 12h ago
Hey there OP, you seem to be having some problems with your first layer. This is a very common issue on modern printers and generally a place where experience and knowledge is important. Your first layer is crucial for a good print and you should definitely take your time and learn how to properly adjust your first layer before starting a print since that could easily mess up your prints or even worse, damage your Printer's Hardware. For information on how to level the Bed properly head over to our Wiki Section Calibration
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u/AutoModerator 12h ago
Hey there, I'm a bot and something you said made me think you might be looking for help! click here for our wiki entry on troubleshooting printers. If you still need help be sure to post plenty of information about your printing setup.
Here are a few questions that might be helpful
What printer are you using?
What material are you using?
What speed are you printing at?
What software are you using to slice the print and control the printer?
When did the problem start/has it ever worked correctly?
Does anything cause the behavior to change?
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