First Layer inconsistent
Hi Everyone,
So I have had my mk4 since july and I absolutely love it, however recently I've been kinda annoyed with a problem that seems super inconsistent; my first layer being too high. As we all know, the mk4 has a loadcell sensor that probes the bed before each print to calculate its own z offset. Any disturbance can cause the offset to be calculated incorrectly, such as a piece of filament. This is my exact problem. I am using esun PLA+ and during the probing process, the nozzle is heated to 170 and then does a "nozzle clean" which is where it just taps the nozzle a few times to help squish any filament out of the way. The problem is that during this, my nozzle is already clean and nothing is oozing out. However, as soon as it begins the auto bed level process, a milimeter or so of filament oozes out of the nozzle. This is not everytime either which is why it is frustrating. As shown in the picture I created, it is such a small piece however it makes contact with the bed, making the loadcell thing the nozzle hit the bed itself. I've tried setting my nozzle temp to 170 outside of a print and it never oozes. I changed the start gcode to retract 2,5, and 10mm and non of that helped. Tried lowering the probe temp from 170 to 160, didn't help so I lowered it to 150, still didnt help. I also did some pressure advance tuning and that didn't help either. Like I said its super inconsistent and oozes about every other print. It's also difficult during the actual probing to clean the nozzle as it already sits pretty low and then taps quickly, which if I touch it, the load cell will interpret that. I honestly don't know what to do next. Its quite frustrating as I basically have to watch my prints up until the first layer to make sure the automatic leveling works, and if it fails I have to cancel my print, clean the nozzle, and then pray the restart of the print doesn't fail again. Any help would be heavily appreciated.
