# DIY Lulzbot Mini - Bed Leveling Problems **URL:** \ **Category:** Software\ **Created:** [March 21, 2016, 5:26pm UTC](https://forum.lulzbot.com/t/diy-lulzbot-mini-bed-leveling-problems/3171 "2016-03-21T17:26:40Z")\ **Posts on this page:** 1\ **Showing post:** 14
**Author:** ![ScottW](https://avatars.discourse-cdn.com/v4/letter/s/53a042/32.png) [@ScottW](https://forum.lulzbot.com/u/ScottW)\ **Post date:** [April 6, 2016, 3:37pm UTC](https://forum.lulzbot.com/t/diy-lulzbot-mini-bed-leveling-problems/3171/14 "2016-04-06T15:37:48Z")
> [@Andre B](#): > > I can not find it, me and the forum search do not get along everything i want to find is too common and the computer will not be bothered to search. I could be wrong but I remember reading a post where someone modified the firmware so that if the sensor was not detected within some small distance from where it was expected to be it then stopped with an error. You are probably remembering that from the discussion of a particular Marlin 1.1 RC3 build. The exact quote you read was probably this from the last message in the thread: > [@jrhubott's Mini Firmware Totally Rocks](https://forum.lulzbot.com/t/jrhubotts-mini-firmware-totally-rocks/2815/1): > > Making this a new thread to emphasize the point. wink The way his firmware does the probing is for the five prints I’ve used it on so far, 100% spot on. I’m using PETG which is a bit more gummy than ABS and I usually expect about 1 in 5 probes to fail. I just started my 5th print, printer totally cold, no pre-heat, 40F ambient temp in the garage, no pre-clean, blackened nozzle – his firmware did the job perfectly despite these contrary conditions. If you’re having trouble with probing, I’… > I think I read a description that his probing sequence check the z heights of the 4 washers from the current attempt against the results from the previous one and does something (aborts? retries? pauses for user input?) if the difference is too great. I may be remembering this incorrectly… The proposal that poster was recalling entailed comparing the previously stored compensation matrix to the current one, then stopping for nozzle cleaning and repeating the sequence after user input. With no standard way to get user input on the Mini (no LCD or knob control), the idea never really applied to the mini (but might be something that could work with the Taz6, or other printers with click-wheel or touchscreen input). --- _[View the full topic](https://forum.lulzbot.com/t/diy-lulzbot-mini-bed-leveling-problems/3171)._