--- title: Movement issues and how to fix them (BCN3D Sigmax) description: Your BCN3D Sigmax is behaving strangely and you don't know why. No worries, this article will help you locate the issue and fix it quick and easily.    Here's a list of what might happen if your print --- [Skip to content](https://support.bcn3d.com/knowledge/movement-issues-bcn3d-sigmax#main-content) 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 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) # Movement issues and how to fix them (BCN3D Sigmax) Your BCN3D Sigmax is behaving strangely and you don't know why. No worries, this article will help you locate the issue and fix it quick and easily.    Here's a list of what might happen if your printer has movement issues: [Erratic movement](https://support.bcn3d.com/knowledge/movement-issues-bcn3d-sigmax#erratic) [Loud screeching noise coming from the sides of the printer](https://support.bcn3d.com/knowledge/movement-issues-bcn3d-sigmax#x-endstop) [Printhead falls short when moving along the X axis](https://support.bcn3d.com/knowledge/movement-issues-bcn3d-sigmax#M504) [Loud screeching noise coming from the back of the printer](https://support.bcn3d.com/knowledge/movement-issues-bcn3d-sigmax#y-endstop) [Printing platform only goes down](https://support.bcn3d.com/knowledge/movement-issues-bcn3d-sigmax#endstop-2) [Printing platform keeps moving up, producing a loud noise](https://support.bcn3d.com/knowledge/movement-issues-bcn3d-sigmax#endstop-1)   --- ### Erratic Movement If the printer moves strangely while printing or calibrating, it may have something to do with the electronics. Try to locate if the issue happens in one head or axis in particular.  ![driver y sigma](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Draft/driver%20y%20sigma.jpg?width=400&name=driver%20y%20sigma.jpg) If you find that the printer moves its Y axis erratically, the issue may be located in the Y driver or in the Y flat cable. You can locate this issue by swapping the Y driver with the extruder motor driver. If the issue gets solved, you'll have to replace the driver for a new one.  ![driver x sigma](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Draft/driver%20x%20sigma.jpg?width=400&name=driver%20x%20sigma.jpg) If the movement only happens with one of the printheads along the X axis, the issue may be located on either the X driver board that controls each head or the flat cable. Swap the X driver with the other and see if the problem moves to the other head, if it does, the driver that's malfunctioning will need to be replaced.    **Note:** Remember that the drivers that control each head are located in the opposed side, for example: The left head is controlled by the right X driver. These articles will help you in this matter: [How to replace the X, Y and Z drivers (BCN3D Sigmax)](https://support.bcn3d.com/knowledge/x-y-z-drivers-bcn3d-sigmax?hsLang=en) [How to replace the extruder motor driver (BCN3D Sigmax)](https://support.bcn3d.com/knowledge/change-extruder-driver-bcn3d-sigmax?hsLang=en)   --- ### Loud screeching noise coming from the sides of the printer If when starting any process (printing, calibration, loading filament, moving the platform...) one of the heads gets stuck in its home position and produces a loud noise while static, this is a sign of an endstop failure in the X axis. Check out this guide to locate and solve this issue: ![endstop x sigma front](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Draft/endstop%20x%20sigma%20front.jpg?width=400&name=endstop%20x%20sigma%20front.jpg) [Endstop issues and how to fix them (BCN3D Sigmax)](https://support.bcn3d.com/knowledge/endstop-issues-bcn3d-sigmax?hsLang=en)   --- ### Printhead falls short when moving along the X axis During calibration, either the left head or the right one go only until the middle of the platform. ![printing heads hitting each other](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Draft/printing%20heads%20hitting%20each%20other.jpg?width=400&name=printing%20heads%20hitting%20each%20other.jpg) This is caused by having wrong EEPROM values and firmware version. Fixing this is quite easy: Simply update your firmware so it matches your BCN3D Sigmax and run the gcode attached: [How to upgrade the Firmware (BCN3D Sigmax)](https://support.bcn3d.com/knowledge/update-firmware-bcn3d-sigmax?hsLang=en) [M504.gcode](https://support.bcn3d.com/hubfs/M504.gcode?hsLang=en)   --- ### Loud screeching noise coming from the back of the printer If when starting any process (printing, calibration, loading filament, moving the platform...) the carriage gets stuck at the back of the printer and produces a loud noise while static, this is a sign of an endstop failure in the Y axis. Check out this guide to locate and solve this issue: ![endstop y sigma](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Draft/endstop%20y%20sigma.jpg?width=400&name=endstop%20y%20sigma.jpg) [Endstop issues and how to fix them (BCN3D Sigmax)](https://support.bcn3d.com/knowledge/endstop-issues-bcn3d-sigmax?hsLang=en)   --- ### Printing platform only goes down This issue is easily recognisable, no matter what you tell your 3D printer to do, it only goes down. This issue has only one cause, and it's the Z endstops being stuck on the trigger position. Follow this guide to fix or replace them: ![endstop z sigma](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Draft/endstop%20z%20sigma.jpg?width=400&name=endstop%20z%20sigma.jpg) [Endstop issues and how to fix them (BCN3D Sigmax)](https://support.bcn3d.com/knowledge/endstop-issues-bcn3d-sigmax?hsLang=en)   --- ### Printing platform keeps moving up, producing a loud noise If when starting any process (printing, calibration, loading filament, moving the platform...) the printing platform keeps moving up and produces a loud noise, this is a sign of an endstop failure in the Z axis. Check out this guide to locate and solve this issue: ![endstop z sigma](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Draft/endstop%20z%20sigma.jpg?width=400&name=endstop%20z%20sigma.jpg) [Endstop issues and how to fix them (BCN3D Sigmax)](https://support.bcn3d.com/knowledge/endstop-issues-bcn3d-sigmax?hsLang=en)   **Conclusions** If your movement issue is not listed in this article, contact our support team to get it fixed by filling up this [form](https://support.bcn3d.com/knowledge/kb-tickets/new?hsLang=en). #### [Forum Community](https://support.bcn3d.com/knowledge/bcn3d-forum-community?hsLang=en) This article doesn't fix your issue? Check out our [**forum community**](https://support.bcn3d.com/knowledge/bcn3d-forum-community?hsLang=en) for more info about this   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)   | --- #### RELATED ARTICLES | | --- | | [![maintenance eng](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Related%20Articles%20English/maintenance%20eng.png?width=336&name=maintenance%20eng.png)](https://support.bcn3d.com/knowledge/maintenance-plan-bcn3d-sigmax?hsLang=en)   | [![clean axes EN](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Related%20Articles%20English/clean%20axes%20EN.png?width=336&name=clean%20axes%20EN.png)](https://support.bcn3d.com/knowledge/clean-lubricate-axes-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)** :) | | --- | - [Omega](https://support.bcn3d.com/knowledge/omega?hsLang=en#main-content) - [Manuals & Downloads](https://support.bcn3d.com/knowledge/omega?hsLang=en#manuals-downloads) - 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