Should the Z-probe height need to be adjusted after manually levelling the bed.
I've been struggling to get my printer to print consistently without having to constantly adjust the z-probe height but I can't seem to manage it. recently I printed a number of prints until it stopped printing consistently and became unlevel. So I went through my manual be levelling process and then ran the bed-mapping function (software correction) and when I tried to print after doing that I found that suddenly my nozzle was over twice the distance from the bed (was 0.13, now 0.32). So in order to get it printing again I had to adjust my z-probe height to close that gap again. It seems like I have to constantly adjust the z-probe height between prints when I gets off and I'm struggling to understand why the z-probe height seems to get so inaccurate over time.
Comments
None the less checksum errors are not good also they get corrected. The amount really differs between printers and hosts and cables and baud rates. Some have normally no errors at all while other have errors every now and then (every 1000 lines or so). If you get ver frequent errors (every 10 lines or so) your settings are wrong.
You can change first changing baud rate between 115200 and 250000 - one of them normally works better. Don't forget you need to change it on firmware AND server to work. Also a different usb cable can improve - shorter and shielded are things having a positive effect.
You can also try to login over ssh if using a pi and remove modemmanager - it interferes at printer connection with communication as we found out.
sudo apt remove modemmanager
does the trick if installed.