# Lulzbot Mini 2 grinding during Auto Home

**URL:** <https://forum.lulzbot.com/t/lulzbot-mini-2-grinding-during-auto-home/25157>\
**Category:** LulzBot Mini\
**Created:** [December 19, 2022, 1:34pm UTC](https://forum.lulzbot.com/t/lulzbot-mini-2-grinding-during-auto-home/25157 "2022-12-19T13:34:21Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![joel\_graff](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/joel_graff/32/10792_2.png) [@joel\_graff](https://forum.lulzbot.com/u/joel_graff)\
**Post date:** [December 19, 2022, 1:34pm UTC](https://forum.lulzbot.com/t/lulzbot-mini-2-grinding-during-auto-home/25157/1 "2022-12-19T13:34:21Z")

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My Mini 2 has been making a lot of grinding noises as it moves, lately. It’s happening in several places, but most noticeably, it happens when I have it auto home (from the printer control panel). There, it’ll move to the home position on the x-axis, grind loudly and stop. On occasion it’ll halt with a “homing failed” message.

Is there possibly a switch or something going bad?

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<div class="post-metadata">

**Author:** ![Wrathernaut](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/wrathernaut/32/13542_2.png) [@Wrathernaut](https://forum.lulzbot.com/u/Wrathernaut)\
**Post date:** [December 19, 2022, 8:07pm UTC](https://forum.lulzbot.com/t/lulzbot-mini-2-grinding-during-auto-home/25157/2 "2022-12-19T20:07:52Z")

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Check your Sensorless home (bump) sensitivity settings.

Settings → advanced → TMC Drivers → Sensorless Homing  
Default is X: 3, Y: 3  
The lowest sensitivity setting for TMC 2130 drivers used in the Einsy Retro Board is +63, and highest sensitivity is -64. First try at 3 if it’s been changed from stock, and if it’s already there, keep reducing the number until it’s reliably homing.