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I have recently bought an Ender 3 S1 Pro and it has been a bit of a hit and miss so far. My main problem has been the Z offset. It keeps changing between prints. The first print turns out okay and then when I print the same thing again it just breaks.

I followed the steps for method one from

to level the X axis gantry which made things much better. For a while. But just recently a print failed after about half an hour. It seemed like the printer got the Z-offset wrong because the layers just wouldn't stick any more. I aborted the print and did a height map calibration: Height map calibration And this how it went. The printer also made some stuttering sounds when probing the plate at the far right.

I'm using Klipper with MainsailOS instead of the stock firmware. I have updated everything to the latest available version.

It seems like I need to make some adjustments, but I'm not sure what to do. Should I try to adjust the X-gantry again? I have levelled the bed and the four corners are pretty much level. I'm also using this model to get a good enough first layer. And that works, but only for one print. Then I have to redo the Z-offset calibration as well as perform the height map calibration. I don't think I should have to do that every time? The printer is placed in a stable location and I'm not moving it between prints. I also clean the bed with IPA before each print. And I have a PEI plate.

So I'm wondering what I should try to to adjust/tweak/calibrate to get the printer to work reliably?

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Try tightening the eccentric nuts on the Y carriage, they were lose on mine from factory which was causing it to rock side-to-side so made bed leveling impossible.

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