--- title: How to check flat cable connections (BCN3D Sigmax) description: A bad condition or connection of the flat cables will lead to a malfunction of some components --- [Skip to content](https://support.bcn3d.com/knowledge/check-flat-cable-connections-bcn3d-sigmax#main-content) - [English](https://support.bcn3d.com/knowledge/check-flat-cable-connections-bcn3d-sigmax) - [Español](https://support.bcn3d.com/es/knowledge/check-flat-cable-connections-bcn3d-sigmax) English Show submenu for translations [Contact support](https://support.bcn3d.com/knowledge/kb-tickets/new?hsLang=en) [Customer portal](https://support.bcn3d.com/repair-service?hsLang=en) ![knowledge-base-header-bcn3d-logo.png\]](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Header/knowledge-base-header-bcn3d-logo.png?height=40&name=knowledge-base-header-bcn3d-logo.png) - [Default HubSpot Blog](https://blog.bcn3d.com/) Open main navigation Close main navigation - [Default HubSpot Blog](https://blog.bcn3d.com/) - - [English](https://support.bcn3d.com/knowledge/check-flat-cable-connections-bcn3d-sigmax) - [Español](https://support.bcn3d.com/es/knowledge/check-flat-cable-connections-bcn3d-sigmax) English Show submenu for translations - [Contact support](https://support.bcn3d.com/knowledge/kb-tickets/new) - [Customer portal](https://support.bcn3d.com/repair-service) - [BCN3D forum](https://www.bcn3d.com/community/) [BCN3D forum](https://www.bcn3d.com/community/) Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Knowledge base - BCN3D](https://support.bcn3d.com/knowledge?hsLang=en) 2. [Sigma + Sigmax](https://support.bcn3d.com/knowledge/sigma-sigmax?hsLang=en) 3. [Maintenance](https://support.bcn3d.com/knowledge/sigma-sigmax?hsLang=en#maintenance) # How to check flat cable connections (BCN3D Sigmax) ## A bad condition or connection of the flat cables will lead to a malfunction of some components   Flat flexible cables (FFC) are used as connections between the mainboard, the drivers, and the extruder boards on your printer. It's important that these cables are properly connected and in good condition in order for the printer to operate correctly. In case you need to order a new cable you can contact your reseller or our sales department at sales@bcn3d.com. Find the SKU references below: | **Model** | **SKU** | | --- | --- | | FFC X0 | [14050](https://www.bcn3d.com/product/ffc-flexible-flat-cable-sigmax/) | | FFC X1 | [10858](https://www.bcn3d.com/product/ffc-flexible-flat-cable-sigmax/) | | FFC H0 | [14093](https://www.bcn3d.com/product/ffc-flexible-flat-cable-sigmax/) | | FFC H1 | [14094](https://www.bcn3d.com/product/ffc-flexible-flat-cable-sigmax/) | | FFC Y | [10861](https://www.bcn3d.com/product/ffc-flexible-flat-cable-sigmax/) | | FFC Z | [10860](https://www.bcn3d.com/product/ffc-flexible-flat-cable-sigmax/) | | FFC E0 | [14051](https://www.bcn3d.com/product/ffc-flexible-flat-cable-sigmax/) | | FFC E1 | [10862](https://www.bcn3d.com/product/ffc-flexible-flat-cable-sigmax/) | **FFC:** Flat flexible cable **X,Y,Z or E:** Axis reference **0 or 1:** Left or Right In the following steps we'll show where the connections are located and how to access these. If you already know where these are, continue [here](https://support.bcn3d.com/knowledge/check-flat-cable-connections-bcn3d-sigmax#check-cables). ![FFC-Location](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/How%20to%20check%20flat%20cable%20(FFC)%20connections/FFC-Location.png?width=558&name=FFC-Location.png) The **X and Y drivers** are easily accessible without removing any cover. These are located on the sides of the X/Y carriage and on the top right rear side of the printer. To check the connections on the **E drivers** you'll have to remove the E driver cover located underneath the extruder motor using a 5.5mm wrench ![](https://support.bcn3d.com/hs-fs/hubfs/image-49.png?width=339&name=image-49.png) To have access to  the **Z driver** and the **mainboard** connections remove the inner cover. ![sigmax-inner-cover-1](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/Retirar%20paneles/sigmax-inner-cover-1.png?width=387&name=sigmax-inner-cover-1.png) ![FFC-Mainboard](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/How%20to%20check%20flat%20cable%20(FFC)%20connections/FFC-Mainboard.png?width=688&name=FFC-Mainboard.png) To have access to the extruder board, remove the connection cover screws. ![FFC-Extruderboard](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/How%20to%20check%20flat%20cable%20(FFC)%20connections/FFC-Extruderboard.png?width=688&name=FFC-Extruderboard.png) **Check FFC connections** To lose the flat cables you can use a flat 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. ![FFC-Unplug](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/How%20to%20check%20flat%20cable%20(FFC)%20connections/FFC-Unplug.png?width=688&name=FFC-Unplug.png) To check the cables, remove them from the board these are connected to, and check the condition of the pins and the cable itself. ![FFC-Driver](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/How%20to%20check%20flat%20cable%20(FFC)%20connections/FFC-Driver.png?width=688&name=FFC-Driver.png) ![FFC-Damaged](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/How%20to%20check%20flat%20cable%20(FFC)%20connections/FFC-Damaged.png?width=688&name=FFC-Damaged.png) 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. When connecting the cable back, make sure that it is properly connected, as shown here: ![FFC-Connection](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/How%20to%20check%20flat%20cable%20(FFC)%20connections/FFC-Connection.png?width=384&name=FFC-Connection.png) This problem is more likely to happen in the FFC that are in motion during a print job (X0, X1, H0, H1)   #### **[Forum community](https://support.bcn3d.com/knowledge/bcn3d-forum-community?hsLang=en)**   Repair didn’t go as planned? Check out our **[forum community](https://support.bcn3d.com/knowledge/bcn3d-forum-community?hsLang=en)** for troubleshooting help.   It's important to keep your printer in good shape to make the most out of it. In this chart you can find a list of the extruder maintenace procedures and how frequently these should be done. [Maintenance Plan](https://support.bcn3d.com/knowledge/maintenance-plan-bcn3d-sigmax?hsLang=en)   ![bcn3d-recycle](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/bcn3d-recycle.png?width=27&name=bcn3d-recycle.png)  Take your e-waste to a certified recycler. [Check how we do it in BCN3D.](https://support.bcn3d.com/knowledge/environment-bcn3d?hsLang=en)   | --- #### RELATED ARTICLES | | --- | | [![maintenance eng](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Related%20Articles%20English/maintenance%20eng.png?width=600&name=maintenance%20eng.png)](https://support.bcn3d.com/knowledge/maintenance-plan-bcn3d-sigmax?hsLang=en) | [![check mainboard fuse eng](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Related%20Articles%20English/check%20mainboard%20fuse%20eng.png?width=600&name=check%20mainboard%20fuse%20eng.png)](https://support.bcn3d.com/knowledge/mainboards-fuse-bcn3d-sigmax?hsLang=en) | | --- | --- | | **You can help improve the BCN3D Knowledge Base.** If you feel there are guides that we are missing or you found any error, please use this form to report it. **[Report form](https://share.hsforms.com/1F7t1sBuOQyWlAeRwwFSjgQ3fec5)** :) | | --- | - 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