--- title: How to replace the Y motor (BCN3D Sigmax) description: In this article you will learn the procedure to change the Y motor --- [Skip to content](https://support.bcn3d.com/knowledge/replace-y-motor-bcn3d-sigmax#main-content) - [English](https://support.bcn3d.com/knowledge/replace-y-motor-bcn3d-sigmax) - [Español](https://support.bcn3d.com/es/knowledge/replace-y-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-y-motor-bcn3d-sigmax) - [Español](https://support.bcn3d.com/es/knowledge/replace-y-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 Y motor (BCN3D Sigmax) ## In this article you will learn the procedure to change the Y motor   | **Tools** |   |   | | --- | --- | --- | | ![allen-icon](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/allen-icon.png?width=21&name=allen-icon.png) | > 2mm Allen  |   | | ![allen-2-icon](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/allen-2-icon.png?width=16&name=allen-2-icon.png) | > 1.5mm Allen  |   | | ![socket-driver-icon](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/socket-driver-icon.png?width=75&name=socket-driver-icon.png) | > 5.5mm Socket wrench |   | ---   **1.** To replace the Y motor, 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=394&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=388&name=sigmax-turn-off-2.png) | | --- | --- |   **2.** Unplug the motor cable from the Y driver. ![Y-motor-driver](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/how%20to%20change%20y%20motor/Y-motor-driver.png?width=600&name=Y-motor-driver.png)   **3.** Remove the Bowden tube to have access to the motor screws. | ![\_MG\_2340](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/change%20extruder%20sigma/_MG_2340.jpg?width=688&name=_MG_2340.jpg) | ![\_MG\_2342](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/change%20extruder%20sigma/_MG_2342.jpg?width=688&name=_MG_2342.jpg) | | --- | --- |   | **4. **Loosen the nuts that hold the motor in place with a 5.5mm socket driver.  | ![nut-icon](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/nut-icon.png?width=26&name=nut-icon.png)**x2 M3** | | --- | --- | ![y-motor-tensor-2](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/how%20to%20change%20y%20motor/y-motor-tensor-2.png?width=560&name=y-motor-tensor-2.png) **Tip:** You may have to reduce the belt tension by loosening the two hollow screws placed under the belt tensioner with a 1.5mm allen key.   | **5.** Take out the Y motor from the stepper holder by loosening the screws that hold the motor in place. | ![screw-icon](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/screw-icon.png?width=18&name=screw-icon.png)**x3 M3 6mm** | | --- | --- | ![motor-y-screw-1](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/how%20to%20change%20y%20motor/motor-y-screw-1.png?width=560&name=motor-y-screw-1.png)   **6.** Install the pulley on the new motor. ![motor-y-pulley](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/how%20to%20change%20y%20motor/motor-y-pulley.png?width=560&name=motor-y-pulley.png) **Tip:** Make sure to tighten the set screw on the flat face of the motor's shaft.    **7.** Attach the motor to the stepper holder and install it on the printer’s structure, making sure that you adjust the tension screws again.   **Conclusions** To finish the assembly process, follow the process from Step 3 to Step 5 in inverse order.    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 | | --- | --- | --- | | ![motor y assembly](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Draft/motor%20y%20assembly.jpg?width=107&name=motor%20y%20assembly.jpg) | BCN3D Sigma/Sigmax Y motor + Heatsink | [SKU 16015](https://www.bcn3d.com/product/y-axis-motor-assembly/) | | --- #### 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) | [![pulley noise eng](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Related%20Articles%20English/pulley%20noise%20eng.png?width=600&name=pulley%20noise%20eng.png)](https://support.bcn3d.com/knowledge/remove-pulley-noise-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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