# BL-Touch bed leveling seems to produce tilted bed level around Y-axis

I have a Tevo Tornado that I've outfitted with an official BL-Touch auto level sensor. I can see the bed probing run, and I can see the Z axis slowly adjust during x/y moves, so it's doing something. However, you can see that there appears to be a systematic tilt:

Any ideas what could be causing this? The bed, gantry and print head is tight, no wobble. Here's my start code:

G28 ; home all axes
G29
G1 Z5 F5000 ; lift nozzle


I have mesh leveling enabled with a 5x5 grid and correct probe offsets. The bed itself is on PETG printed standoffs instead of springs to eliminate any jitter.

• would be good to know how it was before you've installed BL device :) was it better or worse before? as i suppose it was better than it is so my first idea is that the "correction" your device is giving has the opposite direction so it roughly doubles the difference – darth pixel May 16 at 5:34
• @darthpixel not sure why you think this made it worse, i made no mention of that. the behavior with the bltouch is better than manual calibration without. – kolosy 2 days ago