Worn leadscrew?

[Husky1]

I have engraved multiple rulers (10mm spacing) on a blank plate. First i engraved with x axis (from right to left and then vice versa) and the the same for y axis, overall 4 rulers. The result is the same as it was on my 5 parts with the error. X axis has 0.5mm error, y axis is ok. Engraving from left to right and vice versa doesnt show any error when comparing those two cuts. So i guess no mechanical error.

On the pics bellow it shows where the error appears. It is in the middle area, approx 0.5mm error. I circled where the camera shows correctly because of its lens.



On following pics i fixed the ruler in the center of the engraved ruler and it shows the same error as on the part:



This must be something with the servos. Is this fixable with servo tuning considering i have no clue how to fine tune the servos?

[JAZZCNC]

That just looks like your steps per setting is wrong. It's not moving the amount you think it is.? The first thing you need to do is check that it moves the amount you tell it with one move. Using a ruler to measure against isn't accurate enough you need to measure with digital calipers at least or ideally linear scale.