Hi perpetual; Could be related, if so another issue to resolve!
Almost every print, we go through a phase of resin not covering the build area, in the first mm's of z rising. If we are using default settings, the vat and everything zips pretty quickly, so we have to quickly tilt and hope it's enough, then gently set the machine back before the settling time/exposure. We also have shims from whatever we found laying around, a pencil, a mould frame component, little things that help level/flow the liquid in the vat. We've used iPhone Compass app to confirm vat surface is level, don't know if that is accurate enough. Looking at the sides of the vat, without shims under the feet, resin appears level.
Should we maybe be using more overlift? Sometimes we leave it at over 6mm, which seems a bit excessive.
Can you offer an opinion or experience with initial/subsequent overlift and initial level height? Thanks!
ZLab3d, printing with B9Creator 1.1 & 1.2 since 2013