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How to replace the FEP film (SL1S)

How to replace the FEP film (SL1S)

How to replace the FEP film (SL1S)
Relevant for:
Last updated a year ago
How to replace the FEP film (SL1S)
 Difficulty
Moderate
 Steps
14
 Available languages
CSDEESFRITPL

Step 1 Introduction

Introduction
Introduction
This guide will take you through the replacement of the FEP film on the Original Prusa SL1S resin tank.
All necessary parts are available in our shop shop.prusa3d.com
Note that you have to be logged in to have access to the spare parts section.
Before you start, make sure there is no resin in the resin tank. Clean the tank.

Step 2 Video tutorial

You can follow this online guide, or watch the video tutorial. Both methods are the same.

Step 3 Tools necessary for this guide

Tools necessary for this guide
Tools necessary for this guide
Tools necessary for this guide
Tools necessary for this guide
For the following steps, please prepare:
TX9 Torx key (1x)
Piece of cloth or paper towels for cleaning the resin tank
Spatula (1x) recommended for removing resin residue
Knife with a sharp tip (1x)
Nitrile gloves are recommended while handling with the FEP film
At least two pairs of gloves are recommended. Use one to remove the origin film and the other pair to install a new film.

Step 4 Removing the FEP film

Removing the FEP film
Removing the FEP film
Removing the FEP film
Using the TX9 Torx key release all 22 screw from the bottom side of the resin tank.
Do not throw away the screws, you will need them later on.
Push the FEP film from the inside out of the resin tank using your fingers.
Use nitrile gloves to avoid contact with resin residues.

Step 5 Cleaning the tank

Cleaning the tank
Cleaning the tank
Cleaning the tank
Cleaning the tank
Using a spatula, carefully scrape all the resin leftovers off the edges on the tank. The edges must be perfectly clean. Otherwise, the tank will leak!
Clean the tank with Isopropyl Alcohol and a towel.
Clean the metal frame.

Step 8 Preparing the FEP film

Preparing the FEP film
Preparing the FEP film
Preparing the FEP film
WARNING: the following procedure is crucial. Make sure you read the instructions first! The new FEP film consists of three layers. The outer layers are just a protection film for the middle layer, which is the actual FEP film.
Separate all layers slightly apart to recognize them:
Semi-thick outer layer (protection)
Thick inner layer (FEP film)
Thin outer layer (protection)
Remove both protection layers so end up with the middle layer only. Also, check you have removed all the remains.

Step 9 Preparing the resin tank frame

Preparing the resin tank frame
Preparing the resin tank frame
Preparing the resin tank frame
Carefully place the FEP film on the frame and on the screws, use them to stretch and align the film.
Carefully rotate the frame upside down.
We recommend using nitrile gloves while handling the FEP film to avoid fingerprints on the film.

Step 10 Inserting the torx screws

Inserting the torx screws
Inserting the torx screws
Inserting the torx screws
Inserting the torx screws
Check the holes in the frame and in the film are aligned.
DON'T PUNCH through new holes for the Torx screws!
Start inserting the remaining screws. Don't push hard, or you might bend the frame.
If it's difficult to insert the screw, screw it in by your hand.
Check you have used twenty-two M2.5x8rt Torx screws.
Prepare the resin tank, place it on a flat surface with the bottom facing up.

Step 11 Assembling the resin tank

Assembling the resin tank
Assembling the resin tank
Place the frame with the film and screws onto the tank and start attaching the  2.5x8 screws with the Torx key. Follow the indicated direction, go one by one. 
There are no threads inside the holes in the resin tank. The screw will cut them there during tightening. So lightly push the wrench towards the screw while tightening.
Tighten them a few turns to just start the thread and set the position. Do not tighten the screws fully yet!!
BE CAREFUL. If the Torx key slips, you might damage the FEP film!

Step 12 Assembling the resin tank

Assembling the resin tank
Assembling the resin tank
Assembling the resin tank
Tighten all the screws following the sequence indicated by the numbers in the picture. Start with the one labeled 1 in the corner and work your way around the tank in the zig-zag pattern.
The zig-zag tightening sequence is important to follow to make sure the FEP foil is stretched evenly and the tank won't leak resin.
Finally, fully tighten all the screws. This time, proceed clockwise.
Make sure that all the screws are fully tightened! Leaking resin may fatally damage your printer.

Step 13 Assembling the resin tank

Assembling the resin tank
Assembling the resin tank
Take any knife with a sharp tip (not included in the package).
Carefully punch two holes in the FEP film, as indicated in the picture.
Punch each hole in two directions to create a cross.
Don't use a knife with a blunt tip or you might accidentally overstretch the FEP film.
Pro tip: Turn the tank upside down to its "normal position" and fill it with tap water to its max level. Watch the tank and ensure no water is leaking.

Step 14 It's done

It's done
It's done
Congratulation, you have just successfully replaced the FEP film on your resin tank. Fill it with resin and let's print.
A few tips in conclusion:
Do not use isopropyl alcohol on the FEP film.
Re-calibrate the printer after installing the resin tank with the new FEP film.
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