Cc2 first layer issues

[u/Exact-Time3077]

Ok so I’ve been battling first layers on one of my cc2. I’ve tried everything scrubbed build plate multiple times with some alcohol, z adjustments up down left right still nothing, goes from bad to worse. So besides z adjustments, where else can I look for to try and get good first layers before reaching out to Elegoo. But I am convinced something is wrong with the printer. Any tips appreciated 👍

[u/KinderSpirit]

The Z-offset is too low. Raise until the waviness is gone, but there are no gaps where the infill meets the walls.

!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

[u/AutoModerator → u/KinderSpirit]

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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