I bought this because I have an Ender 3 V2 and they are notorious for having beds that are not flat in many ways. I've tried hundreds of times and different ways to align the bed but never got the print quality I was hoping for. I found BLtouch after searching the internet for ways to level my bed and finally pulled the trigger. First of all, this device is 1000% absolutely amazing and has enabled me to do things I could never do perfectly, every time. The only problem is that the instructions are frankly bullshit! I highly recommend you check out a YouTube review or setup video. With the Ender 3 V2 you have to at least make sure you hit the z-offset and I initially had a big issue with the max z-offset nozzle being an inch from the bed and it drove me crazy when I found that you need to set the nozzle to its home position then go into the settings and set the z axis to 0.00 this will bring it closer to the bed then go to adjust the z -Offset and choose the offset so that the nozzle hardly scratches the paper. and that's it, the BLtouch will always keep the nozzle at that height above the bed, no matter how flat the bed is, so bed wrapped or not, your prints will be perfect! I also strongly recommend that you try to use the Jyers firmware for the Ender 3 V2 instead of the default Creality firmware as it has many, many great features and updates. Overall I will never use this print without BLtouch as it has changed my life in printing. If you're tired of constantly making your bed and fiddling with it to make your prints look pretty, only to do it over and over again once you're ready for your next print, then this is just what you need .
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