Some problem encountered z leveling enforced
My last shield print failed 12 minutes before the end. When I tried to start a new print, I received the following error: “some problem encountered z leveling enforced.” The firmware is 3.8.1-2869. I checked the probe and reran the calibration wizard and everything went fine until I was setting the z for the steel sheet. It said it crashed then then laid down the first line of filament in the center of the heat bed instead of on the front-left edge as it should. It continued to lay down the filament in the correct locations and allowed me to finish with the z calibration. I tried to print again but, at the beginning of the print when it moves through the calibration points, it stops at the wrong locations and makes a ton of noise after point 4. then gives me the same “z leveling enforced” error. Please let me know if you need more information. Thanks in advance. Here's a dropbox link to video: Problem encountered z leveling
RE: Some problem encountered z leveling enforced
I think this is the real solution. Everyone is doing different things to fix the issue and the act of fiddling with the printer fixes it... not replacing the actual replacing of parts.
I got lucky and spotted the problem and both times the z leveling enforced error went away. Basically the z leveling enforced error is when the printer finds too much resistance to moving the carriage up and down. I believe many times this is cause by one side of the carriage being higher than the other. When this error triggers the printer raises the X carriage to the top of the printer so the two sides will "top out" at the top of the printer and when they both top out, theoretically one tops out first and still tries to raise the carriage while the other side continues to rise until it too tops out. Again theoretically leveling the two sides at the top of the printer.
While the printer was doing this z level enforcement over and over again, I spotted the problem...
On my MK3(not Mk3s) there is a strain/kink relief "filament" that runs with the wires that come out of the back of the print head. That strain relieve filament is located at a higher Z level than the actual wires coming out of the print head. This plastic filament strain relief wire hits the top of the inside frame of the printer first when the printer is raising the x carriage. Not only that, inevitably when the x carriage tops out first on this strain relief filament, one side of the x carriage keeps rising while the other is stopped. Then a few seconds later the motor on side the carriage that hit the top of the frame first starts to turn in the opposite direction while the other side is still rising. Then when the second side hits the top, that in turn starts turning in the opposite direction.
In short when the x carriage hits the top is does this asymmetrical little up and down dance. Instead of leveling the carriage it actually makes the level worse.
Solution: place two identical items on top of the orange(or black) printed parts on x carriage, so they top out the x carriage BEFORE the strain relief filament coming to of the back of the print head hits the top INSIDE part of the printer's frame.
I believe many people are taking their printers apart and the process of taking it apart and putting it back together again ends up making the user manually level the printer. So I believe in many cases it isn't the part that is being replaced but the act of taking the printer apart and putting it back together again that solves the issue, when all you need to do is make the printer top out evenly BEFORE the plastic strain relief hits the top of the inside of the frame, causing this little sided to side up and down dance.