Sanding the build plate isn’t 100% necessary, but it increases adhesion significantly; therefore, we’ve included a piece of 80 grit sandpaper in your Sonic Mini 4K toolbox. The following are tips for sanding the build plate:
Step 1: Roughen the Surface of the Build Plate in One Direction
Place the short side of the build plate against a firm, stable surface, then use the 80 grit sandpaper provided in your toolbox to roughen the surface in one direction. Sand it approximately 6-8 times to make sure every part of the build plate is roughened.
Step 2: Check the Roughness of the Build Plate
After roughening the build plate with 80 grit sandpaper, this is what the results will look like. You can also use your fingertips to check if the surface has been roughened equally.
Step 3: Clean the Build Plate
Use 95% alcohol, IPA, or Phrozen Wash to clean the build plate. Make sure all the edges have been cleaned.