This item came with a poorly calibrated X-axis belt that was so poorly adjusted that when it was initially set up the extruder assembly was just trying to return home. This is my second Flashforge printer, the second being the Finder (which I had no problems with and arrived perfectly calibrated). The problem with not being calibrated is that it weighs over 85 pounds. So. Before you unpack it, take it up the stairs and spend time setting it up, take a look at the belts that drive the extruder assembly and make sure they aren't loose. They should be tight, flexible, but still fairly tight. Do yourself a favor and check it out before you start setting it up. Now you can of course adjust the strap(s) as needed after a bit of tedious disassembly. However, you don't have to do this on a brand new printer (maybe after a few hundred prints). I decided the path of least resistance was to repackage and return this behemoth.
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