Endstop issues and how to fix them (BCN3D Sigma)

 

Tools  
allen-icon
Allen key 2.5mm 
allen-2-icon
Allen key 2mm
cutter
Cutter

 

When Sigma gets stuck in home position producing a loud screeching noise. This is a clear sign that you need to check the endstops, maybe 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, in the end of this article there are links with instructions that will help you in the process. 

 

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

endstops-sigma

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 in case of the Z axis one.

endstop-connection-check-2 endstop-connection-check-1

 

2: (Usually in 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 straighten it manually and do a bed calibration to check if the problem continues.

 

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

jammed-endstop

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

broken-endstop

 

Conclusions: 

If none of the article steps works, you will have to 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 maintenace procedures and how frequently these should be done. Maintenance Plan (BCN3D Sigma)

 

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

 

Parts   Buy these parts
x-endstop-component BCN3D Sigma/Sigmax X endstop SKU 10941
x-endstop-component BCN3D Sigma/Sigmax Y endstop SKU 10942
x-endstop-component BCN3D Sigma/Sigmax Z endstop SKU 10943

 


RELATED ARTICLES

check flat cable eng

 

check mainboard fuse eng

 

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