# New Z-20 Slider Not Stall Homing Properly

**URL:** <https://forum.onefinitycnc.com/t/new-z-20-slider-not-stall-homing-properly/28651>\
**Category:** Troubleshooting (X35/X50)\
**Created:** [September 17, 2024, 2:23am UTC](https://forum.onefinitycnc.com/t/new-z-20-slider-not-stall-homing-properly/28651 "2024-09-17T02:23:52Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\
**Post date:** [September 17, 2024, 9:06am UTC](https://forum.onefinitycnc.com/t/new-z-20-slider-not-stall-homing-properly/28651/2 "2024-09-17T09:06:18Z")

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Hey Kaladin,

you could install [inductive proximity sensors](https://forum.onefinitycnc.com/t/controller-software-tool-change-location-0-0-g54-g55-g56/10052/14) as limit switches and this way get rid of unreliable [stall homing](https://forum.onefinitycnc.com/t/how-common-are-missed-steps/18352/8).

> [@Homing sensors for build botics](https://forum.onefinitycnc.com/t/homing-sensors-for-build-botics/27374/4):
>
> The buildbotics-derived Onefinity Controller supports retrofitting [inductive proximity sensors](https://forum.onefinitycnc.com/t/controller-software-tool-change-location-0-0-g54-g55-g56/10052/14) to get rid of unreliable [stall homing](https://forum.onefinitycnc.com/t/how-common-are-missed-steps/18352/8). E.g. you can use [Omron E2B](https://forum.onefinitycnc.com/t/how-common-are-missed-steps/18352/22) but also others are available. The [25-pin I/O port](https://buildbotics.com/manual-v1-0/#25pinioport) has pins to connect them, preferrably over an [optocoupler](https://en.wikipedia.org/wiki/Optocoupler). The accuracy and homing repeatibility is excellent (see [here](https://forum.onefinitycnc.com/t/machining-fixtures-making-short-run-production-a-piece-of-cake/13316/20) and [here](https://forum.onefinitycnc.com/t/machining-fixtures-making-short-run-production-a-piece-of-cake/13316/22)). What you still need is some means to attach them, preferrably made with a 3D printer, to be able to print [these parts](https://forum.onefinitycnc.com/t/masso-g3-based-build-f360-pics-and-1f-photos/7107) (see also [here](https://forum.onefinitycnc.com/t/proximity-sensor-help-needed-aftermarket/22226) and [here](https://forum.onefinitycnc.com/t/how-common-are-missed-steps/18352/23)).
> 
> Unlike photoelectric limit sensors like in the Elite Series, inductive proximity sensors are not affected by humidity and wood dust.

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