You’ve just started a print and you watch like a hawk as the nossel just touches the bed. If it’s too high, it gets bloby and stringy. Too low and your extruder starts clicking as the plastic is jammed the wrong way. And you wonder to yourself, “What?!? I just leveled this thing what’s the problem?” Do I have the solution for you! Lock nuts! Let me describe what’s happening and how to fix it. http://ift.tt/2iojleB look at picture one. The only thing holding this whole thing together is the nut at the bottom and the spring pushing against it. This is not great because the screw is free spinning at the top where it connects to the plate. This makes it so when you tighten the bottom the top can still spin from the vibrations of the printer. So the next time you print, it’s too high or too low. Solution. Put a lock nut under the metal plate. This locks the screw in place and prevents any spin. Then you put the spring over top of it as shown. I placed a washer at the very top because the spring has the nasty habit of scratching into the bottom of the plate and destroying the heated bed. It’s unlikely, but for the cost of 4 washers you can protect yourself. This keeps the screw from moving and the wing nut at the bottom stays stable. I haven’t leveled my bed in months and print every school day. Not new information but I hope it helps you newbies! Welcome to the best thing ever… 3d printing. -Freerain http://ift.tt/2jJmeIN