My Prints Are Coming Out Weird
Perhaps the best guide to improving your print quality lies HERE, where the team at Prusa has written a comprehensive guide that helps you visually identify imperfections and makes suggestions to improve them.
My Prints Fail Before Completion
The best way to ensure that a 3D print will be successful is to pay close attention to bed adhesion and always monitor a print for the first 5 to 10 minutes. Nozzle clogs, curling edges of flat prints, prints not sticking to the bed, and birds nests of filament are all side effects of issues related to the bed of the printer.
Below are a few good points to consider when you are facing the issues mentioned above. Pay close attention to your printer when it begins to exhibit unexpected behavior. If the solutions below don't resolve your issues or if you would like another opinion, you can always reach out to the FUSE team.
First Layer Calibration Tool
Prints not sticking to the bed are almost always remedied by the First Layer Calibration tool in the Calibration menu. You can see the process is demonstrated in THIS VIDEO. If you are using a Prusa MK2 and do not have the option to perform the "First Layer Cal." you may need to update your firmware, as shown HERE.
When in doubt, bring the nozzle a hair closer than is recommended to make sure you are getting good adhesion to the build plate on that first layer.
Remember, the first layer of your print is the foundation, so it needs to be well adhered.
Add a Brim
We recommend adding a brim in your Prusa Control settings, especially the keychains. A brim helps with bed adhesion and keeps the edges of your parts from curling up and warping.
If prints start curling up or wont stick to the bed at all, look at the conditions of the room you are using. Is the printer near a window or ceiling vent, a window, a door that brings in a draft? These temperature fluctuations near a printer can be the cause prints to fail because the plastic is cooling too quickly (it shrinks when it cools).
Some users will place boxes over their machines to avoid this problem, and some go as far as to build enclosures with access doors on them. Schools in cold environments have more issues related to ambient temperature fluctuations.
In some cases, like when a room is cold, heating the bed more that usual may help to keep prints from dislodging from the bed. Where as 60 degrees Celsius is the default bed temperature for PLA, increasing the bed temperature to 65 degrees Celsius or a hair greater can improve your results. This can be done while the machine is printing by pressing the dial in once and entering the Temperatures menu from within the Settings menu.
Keeping the print bed free of grease, dust, and other contaminants can greatly improve print adhesion. Rubbing alcohol is great for cleaning the bed and should be used regularly. If you are using the MK2 it is recommended to swipe the PEI plastic bed coating with acetone to reinvigorate the bite of the surface about once a month or so in addition to the regular alcohol cleaning.