> For the complete documentation index, see [llms.txt](https://promega.printm3d.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://promega.printm3d.com/repair-and-maintenance/install-uninstall/limit-switch-holder/z-axis.md).

# Z Axis

## What is the Z Limit Switch Holder?

This is the Z Limit Switch Holder.

![](/files/-LQ6B2fMsVGqWsnnhQNK)

## Warning

Exercise caution if you attempt to fit your head underneath the bed. The frame could potentially cause lacerations.  

* Use protective headgear (e.g. tear-resistant fabric).
* Enter slowly. Do not rush. 
* Make sure the bed is properly restrained.

## Tools

* T10 Screwdriver
* Flush Cutter (or any cutting pliers will do)

## Additional Hardware

* Nylon Zip tie (1x)

## How to Uninstall

### All Versions

Unscrew previous Z Limit Switch Housing.

![](/files/-LIrt04Sp_ZJtpQJSDeV)

Remove (Clip) Zip Tie.

![](/files/-LIrsyDC3kXzxCjJKXYo)

Remove Limit Switch from previous casing.

* Suggestion: Use a long screwdriver to push the end-stop out of its casing (e.g. Philips head, flat head).
* Video Demonstration: ??

Disconnect Z Limit Switch from Duet Board

![](/files/-LIs-pqM-W8oBc-Tr8y6)

* Refer to " \[ Duet Wiring Guide Name] " for additional help.

## How To Install

### Notes

A zip tie must secure the Z Limit Switch wire. If not, it runs the risk of entangling (and potentially breaking) with a moving bed.

### Version: 051162\_B1

Fit the Limit Switch Wire through the side slit on the Z Limit Switch Housing.

![](/files/-LIs2lqSYGHH6eFk8Zm7)

Firmly press/slide the Limit Switch into Z Limit Switch Housing.

* Make sure to press it in fully in, until a hard stop is reached.

![](/files/-LIs2oSLT1StUVcCcgsY)

Route Limit Switch Wire through side slot.

![](/files/-LIs2q7suCJN51ACoST8)

Screw down the Z Limit Switch Housing.

* Face the lever toward the rails.
* Remember to check for Limit Switching Wire.
  * It must route through the shorter side slot.
  * Do not let the wire compress between the Housing & the Sheet Metal.

![](/files/-LIs1MpTt9zNt0zZOXnA)

Connect Limit Switch Wire to the Duet Board.

![](/files/-LIs-pqM-W8oBc-Tr8y6)

* Refer to “ \[ Duet Wiring Guide Name ]” for additional help.

Install Zip Tie.

* Using the previous holes.

![](/files/-LIs2-sKXMuh72DIfIPO)

* Refer to “ \[ Zip Tie Hole Guide Name ] “ for additional help.

### Version: 051162\_B2

Fit the Limit Switch Wire through the bottom slit on the Z Limit Switch Housing.

![](/files/-LIs2sv5hOjONSQ000AE)

Firmly press/slide the Limit Switch into Z Limit Switch Housing.

* Make sure to press it in fully in, until a hard stop is reached.

![](/files/-LIs2oSLT1StUVcCcgsY)

Route Limit Switch Wire through side slot.

![](/files/-LIs2q7suCJN51ACoST8)

Screw down the Z Limit Switch Housing.

* Face the lever toward the rails.
* Remember to check for Limit Switching Wire.
  * It must route through the side slot.
  * Do not let the wire compress between the Housing & the Sheet Metal.

![](/files/-LIs3CeKrwl15BhdNukx)

Connect Limit Switch Wire to the Duet Board.

![](/files/-LIs-pqM-W8oBc-Tr8y6)

* Refer to “ \[ Duet Wiring Guide Name ]” for additional help.

Install Zip Tie.

* Using the previous holes.

![](/files/-LIs3R8rLjgw5uxeKT0G)

* Refer to “ \[ Zip Tie Hole Guide Name ] “ for additional help.