I wrestled with this for a few days. I did a number of maintenance items and a couple of upgrades and ended up with a new printing problem and a symptom I had not seen prior: High and low first layer spots that were not consistent with nozzle location. These high and low spots have caused a lot of print failures in the last few days.
Makers will recognize that these hexagons were not all printed at once. And, this image shows how the 1st layer depth printing problem is not related to the hot end's location.
I found that if I moved the X carriage back and forth along the gantry, I could feel a very slight wobble. But, the hot end was not loose. I was not a wobble, but more like a waving. It seemed that one or more of the new wheels that I installed were out of round. But, which one(s)? And how could I determine this?
I found that if I moved the X carriage back and forth along the gantry, I could feel a very slight wobble. But, the hot end was not loose. I was not a wobble, but more like a waving. It seemed that one or more of the new wheels that I installed were out of round. But, which one(s)? And how could I determine this?