I will try the different print temps, and I will also try to turn the fan off for the raft.
One thing is that I cannot use PLA because I need watertight prints. (Most of the things that these people are designing in the school are vases, pots, etc.)
My bed is perfectly level, I have leveled it numerous times. I used one of those tubes with the bubble in it to check, and sure enough, perfectly level.
Ok, first problem. You don’t use a level to “level” the bed. “Level” is an abstract generalized term. You need to use the leveling routing that is for the printer. When someone says “level” it means to make the bed a consistent and defined distance from the extruder nozzle. If this is not correct then you will have first layer problems.
Most of the time the leveling is run from the printers control panel and people usually use a regular sheet of paper. If this is not what you are doing then I advise to google it or Youtube to see how it is done.
Until you have the bed set correctly you will never get good or consistent prints.
I realize that, and it came with a specific paper for leveling, (the exact distance between the extruder and the bed) I just used the leveler to make sure it was flat, not to fix it. I have leveled it numerous times with the built-in leveling options.
I use PLA for watertight prints all the time. My house is full of self watering pots and vases made out of PLA. If your extrusion settings are good, your print bed is level, and you have enough solid layers you’ll be plenty watertight. It’s just word of mouth from people on forums and Reddit who only tried with weak solid layer numbers and extruders that aren’t calibrated or set right.
Total side note but but from the short time I used FlashPrint I thought it had a fan on first layer setting, but it’s been a while so not sure. Look forward to see how your next attempt is.
Also remember that ABS will absorb water if left unsealed for a period of time. You should seal it up, in between printing, in a ziploc bag with desiccant. If it gets wet, you will have all kinds of problems and you will probably hear popping sounds from the extruded material as the moisture heats to steam.
