[Sonic Mighty 4K] Replacing the FEP Film

Replacing the FEP film or PFA (nFEP) film is an essential maintenance task for resin 3D printers. It needs to be changed if it becomes dented, deformed, or pierced, but minor scratches and smudges on the film usually don't require replacement as they don't affect print quality.

If you need to replace a new FEP film, follow these steps:

The FEP film needs to be replaced periodically. Learn more about When to replace film

1. Disassembling the Resin Vat

Initial Cleaning

• Take the VAT and clean it thoroughly with sanitizing alcohol.
• Use a soft paper towel to wipe it and let it dry.

Removing Components

• Place the resin vat in an upside-down position and loosen the 20 screws from the vat using a 2.5mm wrench.
• Take the metal frame off the bottom of the resin vat with a wrench.
• Set aside the resin vat and flip over the metal frame.
• Use a 2.5mm wrench to unscrew the screws that hold the two metal frames together.
• Remove the old FEP film.
• Clean the vat and frame to remove any residual resin.

FEP Film Replacement

Tip: To loosen stubborn screws, apply alcohol to the screw joints and let them sit for about 15 minutes before attempting to loosen them again.

• Remove the protective layers from the new FEP film before installing it onto the frame.
• Sandwich the new FEP film between the two metal frames.
• Hold it in place and ensure proper alignment of holes and other elements.
• Poke holes in the FEP film with a sharp-pointed item like a wrench.
• Tighten the 4 screws located at the corners, alternating between opposite corners to ensure even tension.
• Tighten the 6 screws located in the middle of each side, alternating between opposite screws.
• Tighten the remaining screws alternatively.

Reassembling the Resin Vat

• Flip over the newly installed FEP frame and place it back onto the resin vat. The holes with the bevels should be pointed up.
• Tighten the 8 screws located at the four corners of the frame diagonally.
• Tighten the 8 screws located in the middle of each side diagonally.
• Tighten the remaining 2.5mm screws.

Completion

• Using a box cutter, trim the excess FEP film as close to the vat as possible, ensuring that nothing protrudes.
• Finished

Contact Support

By following the above instructions, you can install a new Fep film for your Sonic Mighty 4K. If you find any issues, feel free to reach out to Phrozen Support or your Authorized Reseller for further assistance. When contacting Phrozen Support, kindly send some photos or videos illustrating the issue.