Print time inaccuracies have been reported several times, two of them being
Issues arround resin sensing have been reported too.
I am under the impression that Formlabs is in a kind of a dead end with the resin sensing because it’s a mix between open loop and closed loop systems with very slow sensors and now they have to solve a bad hardware design decision with only being able to act on the software side…
The resin level in the cartridge is an open loop system so they are very conservative with the estimate (which leads to early / frequent / repetitive warnings) and the resin level sensing int he tank is very slow. Both of these issues put together make for a very slow resin sensing loop which has to be performed very frequently when resin level is estimated as low in the cartridge, to be sure to avoid not having enough resin in the tank.