--- title: How to replace the X motor (BCN3D Sigmax) description: In this article you will learn the procedure to change the X motor --- [Skip to content](https://support.bcn3d.com/knowledge/replace-x-motor-bcn3d-sigmax#main-content) - [English](https://support.bcn3d.com/knowledge/replace-x-motor-bcn3d-sigmax) - [Español](https://support.bcn3d.com/es/knowledge/replace-x-motor-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/replace-x-motor-bcn3d-sigmax) - [Español](https://support.bcn3d.com/es/knowledge/replace-x-motor-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. [Troubleshooting](https://support.bcn3d.com/knowledge/sigma-sigmax?hsLang=en#troubleshooting) # How to replace the X motor (BCN3D Sigmax) ## In this article you will learn the procedure to change the X motor     | **Tools** |   |   | | --- | --- | --- | | ![allen-icon](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/allen-icon.png?width=21&name=allen-icon.png) | > 2.5mm Allen wrench |   | | ![caliper-2](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/caliper-2.png?width=69&name=caliper-2.png) | > Caliper |   | ---   **1.** To replace the X motors, first, turn off the printer and unplug it from the power outlet. | ![sigmax-turn-off-1](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/Apagar%20impresora/sigmax-turn-off-1.png?width=481&name=sigmax-turn-off-1.png) | ![sigmax-turn-off-2](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/Apagar%20impresora/sigmax-turn-off-2.png?width=312&name=sigmax-turn-off-2.png) | | --- | --- | | **2.** Loosen the two endstop screws to have access to the X motor screw. Once the endstop has been removed, loosen the X motor screw.  | ![screw-icon](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/screw-icon.png?width=12&name=screw-icon.png) **2x M3x10mm ** ![screw-icon](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/screw-icon.png?width=12&name=screw-icon.png) **1x M3x6mm** | | --- | --- | ![x-endstop-1](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/how%20to%20change%20endstop%20x/x-endstop-1.png?width=560&name=x-endstop-1.png)   | **3.** Cut the two zip-ties that hold the motor cable and then lose the other three X motor screws. | ![screw-icon](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/screw-icon.png?width=12&name=screw-icon.png) **3x M3x6mm** | | --- | --- | ![motor-x-ziptie-2](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/how%20to%20change%20x%20motor/motor-x-ziptie-2.png?width=560&name=motor-x-ziptie-2.png) **Tip: **Be careful! Make sure not to cut the cables along with the zip ties.    **4. **Once the original motor is removed, Install the pulley on the new motor at the same height as it was on the original with the help of a caliper. Make sure to align the pulley screw with the flat shaft face. ![motor-x-ziptie-4](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/how%20to%20change%20x%20motor/motor-x-ziptie-4.png?width=560&name=motor-x-ziptie-4.png) The left motor pulley should be mounted with the geared shaft on top and should be **4mm** apart from the motor itself The right motor pulley should be mounted with the geared shaft at the bottom and should be **2mm** apart from the motor itself. | ![x-motor-L](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/how%20to%20change%20x%20motor/x-motor-L.png?width=387&name=x-motor-L.png) | ![x-motor-R](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/how%20to%20change%20x%20motor/x-motor-R.png?width=387&name=x-motor-R.png) | | --- | --- | **Tip:** Make sure to tighten the shrub screw on the square face of the motor's axle.    **5.** Place the motor in the stepper holder, making sure that the belt is properly installed in the pulley.   **6. **Once the motor is in place, connect the motor cable to the driver board and wrap the zip-ties around the cables to secure them. ![x-motor-sigma](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/how%20to%20change%20x%20motor/x-motor-sigma.png?width=560&name=x-motor-sigma.png) **Tip: **Notice the slots in the sides of the plate that holds the motor, pass the zipties through them and wrap the cables. Zip them tight and cut the remaining plastic for a neater finish.    **Conclusions** 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 maintenance procedures and how frequently these should be done. [Maintenance Plan](https://support.bcn3d.com/knowledge/maintenance-plan-bcn3d-sigmax?hsLang=en)   #### **[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.   ![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)   | **Parts** | | Buy these parts | | --- | --- | --- | | ![x-motor](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Components/x-motor.png?width=107&name=x-motor.png) | BCN3D Sigma/Sigmax X motor + Heatsink | SKU 14087  | | ![motor-pulley](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Components/motor-pulley.png?width=107&name=motor-pulley.png) | BCN3D Sigma/Sigmax X motor pulley | SKU 10446 |   | --- #### RELATED ARTICLES | | --- | | [![adjust belt tension eng](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Related%20Articles%20English/adjust%20belt%20tension%20eng.png?width=600&name=adjust%20belt%20tension%20eng.png)](https://support.bcn3d.com/knowledge/adjust-tension-belts-bcn3d-sigmax?hsLang=en) | [![replace driver eng](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Related%20Articles%20English/replace%20driver%20eng.png?width=600&name=replace%20driver%20eng.png)](https://support.bcn3d.com/knowledge/x-y-z-drivers-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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