I picked this printer up with a bunch of filament for $60. The build plate was really loose so I took it apart and found that the bearings are loose within the plastic part. Not really sure what to do here. I might epoxy the bearings in place. I saw that there is a y axis linear rail upgrade for $40 but that seems like a waste of money.
Resin isn’t that cheap either. Then there’s shipping. That said, if shimming works for test-prints, it may work for this. Personally, I can’t believe there’s not a wedge-centering end-cap or set-screws for dialing in the centering of the bearing just-so, but I’m no expert on this printer.
The bearing is supposed to self center on the shaft with the fitment between the bearing and the shaft. I can’t imagine the pain of trying to manually adjust those very tight tolerance parts for the perfect alignment. Far better to make the housing the bearing goes into correctly from the start.