How to check the flat cable connections (Epsilon Series)

Flat flexible cables (FFC) are used as connections between the mainboard, the drivers, and the extruder boards on your printer. In this article, you will learn how to check the flat cable connections









It's important that the flat cables are properly connected and in good condition in order for the printer to operate correctly. Is recommended to check each month the connection of the flat cables.


  • Warning! Be careful when handling the connection cover as the cables underneath may be damaged.

If the last 4 digits of your printer serial number are higher than 0771 for Epsilon W50 or 0498 for Epsilon W27, you should consider the following:

  • Warning! The piezo cable is extremely sensitive, use caution when handling it.


Check FFC connections

1. To loosen the flat cables you can use a flathead screwdriver to carefully apply pressure to the clip.

In order to avoid damaging the board, make sure that you apply pressure to the connection clip and not the PCB.


  • If your printer has Flat cable clamps, you will need to loosen the screws in order to remove or reconnect the flat cable from the mainboard or the driver.



2. To check the cables, remove them from the board they're connected to, and check the condition of the pins and the cable itself.


  • This problem is more likely to happen on the Y axis flat cable, since if it is not properly installed, it can be damaged by the Y axis rear pulley.

3. When reconnecting the cable, make sure that it is properly connected, as shown here.




  • Note: This problem is more likely to happen in the FFC that are in motion during a print job (X0, X1, H0, H1) Is highly recommended to install the driver spacer with the clamp to avoid this problem.

In case you need to order a new cable you can contact your reseller or our sales department at Find the SKU references below.


Parts     Buy these parts
    Epsilon W50 Epsilon W27
FFC X0 X Axis Left SKU 16080 SKU 16522
FFC X1 X Axis Right SKU 16082 SKU 16518
FFC H0 Extruder - Hotend Left SKU 16005 SKU 16514
FFC H1 Extruder - Hotend Right SKU 16006 SKU 16516
FFC Y Y Axis SKU 16078 SKU 16519
FFC Z Z Axis SKU 10860 SKU 10860
FFC E0 Mainboard - Extruder Left SKU 16081 SKU 16521
FFC E1 Mainboard - Extruder Right SKU 16079 SKU 16520


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