# Keeping zero position

**URL:** <https://forum.onefinitycnc.com/t/keeping-zero-position/14115>\
**Category:** Original/PRO Series (Buildbotics) (Gen 1)\
**Created:** [July 13, 2022, 1:47pm UTC](https://forum.onefinitycnc.com/t/keeping-zero-position/14115 "2022-07-13T13:47:13Z")\
**Posts on this page:** 1\
**Showing post:** 59

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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:** [March 17, 2023, 2:44am UTC](https://forum.onefinitycnc.com/t/keeping-zero-position/14115/59 "2023-03-17T02:44:03Z")

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Hey Chris,

in fact you do the same as what @JDog does as [mentioned above](https://forum.onefinitycnc.com/t/keeping-zero-position/14115/49), which means to circumvent the unreliable [stall homing](https://forum.onefinitycnc.com/t/how-common-are-missed-steps/18352/8) by using the touch probe on a corner that is fixed on machine bed, thereby reducing the use of the touch probe to once per bootup period, and to achieve practically perfect repeatibility. Great!

But I agree to Derek @WaywardWoodworker that with [retrofitted inductive proximity sensors](https://forum.onefinitycnc.com/t/controller-software-tool-change-location-0-0-g54-g55-g56/10052/14) you would not even need this probing once, but just entering any value you like and it would be perfectly reliable.

As you can see on the datasheet of a typical inductive proximity sensor ([Omron E2B](https://www.ia.omron.com/products/family/3203/)), the moment when it is triggered is very predictable and therefore brings accurate homing repeatability.

 ![Omron_E2B__Proximity_Sensors_Datasheet_P010](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/2X/d/d4ea22b72a776b5d248e41a2e264723ce51b0a1e.png)  
Source: [Omron E2B Inductive Cylindrical Proximity Sensor Datasheet](https://assets.omron.eu/downloads/datasheet/en/v3/d116_e2b_cylindrical_proximity_sensor_datasheet_en.pdf)

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