Originally Posted by
Rick Kirchner
Chris - have you swapped bed springs for silicone spacers yet? Those are huge - no resonance to loosen them up.
Remember, just like on our spring perches they need sufficient pre-load to keep from backing off.
I made a device that allows me to put a dial indicator in where the extruder goes on the carriage. Then I run the leveling program, and I can get it to a half-thou across the build surface. there's more variance in the build surface due to getting the decal to lay flat with no bubbles, than there is in my leveling process. Then I replace the indicator with the extruder, set z with paper/friction, and fine tune with z-offset. I used to have to do that in the slicer but Qidi now offers live Z adjustment at .02mm/step with a firmware upgrade.
Some build plates aren't flat, especially when hot, and that causes people a lot of headaches. you'd have to build a fixture with a power supply, heat it up, and then flycut it to get it flat if you have that problem - or buy new parts.