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                  1. Support
                  2. Printer maintenance
                  3. FEP film replacement (SL1)
                   

                  Contents

                  • How to replace the FEP film:

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                  FEP film replacement (SL1)

                  Relevant for

                  SL1
                  5 comments
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                  Please note: Every time you replace the FEP film, tighten the screws properly, but don’t use excessive force. Overtightening the screws may lead to issues with their removal, during the next FEP film replacement.

                  An extreme case of FEP film damage

                  The FEP film is a consumable item, which means it will degrade after a certain time. You can order replaceable FEP films from our e-shop.

                  If you replace the FEP film you must re-calibrate the printer!

                  How to replace the FEP film:

                  Before you start, clean the tank thoroughly and wipe it clean. Use T20 Torx key to loosen the screws. Remove all screws and gently press your fingers against the used FEP film to release it.

                  DON’T use a cordless screwdriver, as it has too much torque.

                  After you remove the FEP film, take a spatula and scrape all bits of leftover resin from the edges. The edges must be perfectly clean, otherwise, the tank will leak

                  Clean the tank and frame using isopropyl alcohol

                  Remember to remove the protective plastic, on both sides of the new FEP film. Align the frame with the new FEP film, so the holes match, then start adding screws one by one.

                  Place the assembly onto the tank body and align the screws with the holes. Don’t create holes for resin tank screws yet!

                  Start tightening the screws only halfway one by one clockwise, as shown in the picture. After all the screws are inserted but not tightened, reseat the parts if necessary and tighten the screws in the same order. Make sure that all screws are tightly screwed.

                  Once everything is in place, take an object with a sharp tip (e.g. a 6mm drill bit) and puncture two holes for resin tank screws.

                  Re-calibrate the printer, using the tank with the new FEP film.

                   
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                  4 comments

                  Log in  to post a comment
                  Rob Meades
                  •
                  The pictures above show the SL1-style metal tank, whereas in my SL1->SL1S converted printer there is a plastic tank into which the 22 tiny torx screws must self-tap. The problem with this is that you can never be _quite_ sure when a self-tapped screw is "home" and any screw left slightly proud of the base of the tank will cause failed prints from then onwards because the tank will never be properly level.

                  It is a _really_ good idea to run the edge of a ruler across the base of the tank when done to check that you have not left a screw slightly high; without this you may find that your prints mysteriously start failing from then on, despite the new FEP and recent calibration.
                  Reply
                  Alex Lichius
                  •
                  I cannot see the assembly order in the images ambigiously clear: it seems logical that the FEP film is pressed down by the metal frame. Hence, the screws go through the metal frame first, then through the FEP film before fixing into the plastic. Is that correct? Thanks.
                  Reply
                  3dMakerparts
                  •
                  The FEP film on my printer is mounted with Torx20 instead of Allen key 2.5mm. Works also fine.
                  Reply
                  Brandon
                  •
                  It should be added to the instructions, that you need to remove the plastic film from BOTH sides of the FEP film prior to installation.
                  Reply
                  William H. - Official Prusa
                  •
                  Thank you. Included the reminder and freshened up the article a little.
                  Reply

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