Endstop Issues and how to Fix them (Epsilon Series)


Allen key 2.5mm 
Allen key 2mm


When the Epsilon gets stuck in the home position and produces a loud screeching noise, this is a clear sign that you need to check the endstops. There is a possibility that one of them is stuck or broken and needs replacing.


Note: It's possible that you need to disassemble the endstops from the printer in order to check them properly. At the end of this article there are links with instructions that can help you with this process. 


Below you can see where the printer’s endstops are placed:


The most common endstop related issues are:


1: Cable connection issues: Check that the endstop cable is properly connected to the
driver or extruder board depending on the axis.




2: (Usually the Z endstops) Bent flat flexible cable. Check if the hotend flat cable is bent on the extruder board connection. If it is, you can manually straighten it and do a bed calibration to check if the problem continues.


3: Jammed switch. It can be unblocked using a cutter or a needle.


4: Broken endstop. Replace the endstop for a new one, see the parts list in this article: Parts list.




If none of this works, replace the Endstop, you can learn how to do that in the following articles:

How to replace the X Endstop

How to replace the Y Endstop 

How to replace the Z Endstop 


Forum Community

This article doesn't fix your issue? Check out our forum community 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


bcn3d-recycle  Take your e-waste to a certified recycler. Check how we do it in BCN3D.


Parts   Buy these parts
x-endstop-component Epsilon Series X endstop SKU 10941
x-endstop-component Epsilon Series Y endstop SKU 10942
x-endstop-component Epsilon Series Z endstop SKU 10943



replace extruder board eng check flat cable eng


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