weird mesh leveling

[StarPowered]

Hi, I have used a Duet Wifi board for a while now and I love it, but recently the heightmap has gotten weird, it hasn't looked like this before. On the image you see the zig zaggy nature of it, the bed was relatively flat before. Does anyone have an idea why this occured?

Link to image (got an error while uploading image) https://i.imgur.com/JOXE8pU.png

[dc42]

@starpowered, I am guessing that the printer is a standard Cartesian one with the print head riding on the X gantry. I suspect the following:

1. You are using a Z probe with a large X offset from the centre of the print head; and
2. The print head is riding loose on the gantry, so that when the belt pulls it from one side, it rocks/tilts one way; and when the belt pulls it from the other side, it rocks/tilts the other way. This tilt raises and lowers the Z probe slightly.

[StarPowered]

@dc42 Ok, I will try to tighten things up some more. I have the Ender 5 Plus

[StarPowered]

@dc42 Fixed it, thanks for the help! The X gantry was fine, but the x axis belt was a bit loose, after tightening it the height map got much better!