Diagnosis checklist of symptoms to match against known issues

Sources of printing issues: this is a list of the common kinds of things that can be wrong with your printer, at the bottom of this page is a list of symptoms matched to possible causes.

Wobbly build platform: this is caused by a loose screw in the buid platform locking latch and can cause dramatic print failures 

Stained PDMS layer in resin tank: this will inevitably happen after a given number of prints with pigmented resin, and can cause "soft" print failures

Broken laser : you might not expect this, given the laser has no moving parts, but they can break

Part bases too thin : the resin tank is mounted on tensioned springs, adjusting these will fix this, or perhaps your resin VAT has too much PDMS

X and/or Y dimension inaccuracy : see galvo adjustment