Maslow 4.1 moves in XY even when jogging Z, old FW with 4.0 worked fine

I upgraded Maslow to 4.1.

Now, at the edges of my work area, when I change the Z axis by 5mm, it moves in the XY dimensions. The video link shows 2 Z axis chanes and 2 Y axis changes.

When cutting, it also does these weird moves and the cut is “jagged”.

Frame 255x160cm, working area 120x60cm.

Firmware v 1.20.

I tried to lower belt tension all the way down to 400 and no difference.

Previously it worked just fine, unfortunately I didn’t note down the firmware version (it was the one that still needed to enter the frame size).

Here is my maslow.yaml.

maslow.yaml (6.8 KB)

Any ideas? Possibly, does 4.1 work with older firmware?

The only seemingly related post is this one, but there is no solution and the behavior of my maslow seems a bit different: hippity hop the Maslow 4.1 goes - #6 by ian_ab

Thank you

When you are adjusting the Z height it looks like you are doing it manually i.e. not in a gcode file, which is fine. but what is happening here is the belts are tightened while it is moving the Z axis then they relax a little when the Z gets to the new value, and as the Maslow is in a corner this means it has unequal pressures on the belts. Does the same thing happen when you are running a Gcode?
You can try out this code, it won’t move the Maslow, just moves the Z up and down a few times. Check to see if it still moves the Maslow around while exercising the Z axis.
Move Z.nc (165 Bytes)

This is only used when you are running the find anchors, The lower it is (while still fully retracting) the better the results are from Find Anchors.

When you are cutting, are you using a GCode or jogging with the arrow keys?

Are your belt anchors down low or at the same height as each arm? As it looks like (from your maslow.yaml file) the anchor points are relatively close to your work area, it may be advantageous to raise them to be the same height as each arm. If you do this, make sure the is no sideways movement in the Anchor point (although the belts need to rotate easily) and you will have to adjust the tlZ etc values in the maslow.yaml file to suit.

If you do another Find Anchors, post a copy of the serial log so we have some idea of what is happening.

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