Prints with Supports Fail but ones flat on Build Plate Work

[celtic007]

I've attempted about 5 or 6 prints so far but I've only had 2 that completed successfully. One was the rook test file. The other was a benchy. Both of these had no supports and were printed directly on the build plate.

Every other time I've tried to print a model that has supports, they all fail. The supports do not even get printed, just the raft. Is this issues with the slicer (I'm using lychee) or the printer itself? I don't think the bed leveling is an issue since I've printed 2 successful times on it and it has not been adjusted since.

Thanks

[celtic007]

I tried again today with a model I had previously attempted. This time, I didn't use a raft, and it printed great, no issues. I'll try again with some other prints I had attempted before that had rafts and remove them to see if they print successfully without them.

[cliffyk]

What exposure times are you using? the supports (hangers) have a rather small cross-section and need to be pretty robust to support the break-away forces between layers.