Ender 3 pro issue

[jimkwaj 0]

My Ender 3 Pro build plate has warped after about 10 builds.  It is now high centered.  Is this common?  Can it be corrected?

[GregValiant 1,342]

I've had mine for 3 years and that hasn't happened.

You can try shimming the corners up with pieces of aluminum foil.  It may take a bit longer to get an even temperature across the surface but other than that it should be fine.

You didn't mention what build surface you have.  I bought the Creality glass plate and it's been fine.

 

A "four corner" leveling system can actually cause something like that.  If two opposite corners are pulling the plate down then the other two corners can hold it up and the result is a bow running katty corner.  Occasionally I will pull my glass plate off and level the metal by itself because I level by hand and over time I will get that bow.

If the center is high and the four corners are drooping then that is different.  Shimming is easy and can work so long as you don't need to stack 8 washers to eliminate the rocking.  Two or 5 thicknesses of aluminum foil should work and aluminum has excellent heat transfer.

 

[1GreatMan 0]

You may have to reverse the bow if it is too much. 

Start by removing the bed from the printer. take a piece of 3/4" plywood and cut it 2" larger than the build plate.

With the build plate upside down mark the hole pattern on the plywood, then drill the hole pattern 1/4" dia.

using fender washers and 1 1/2 x1/4 -20 with nuts and 1/4"washers.

put a 1/4" washer the screw. put the screw through the plywood.. X4

put the build plate onto the screws. and then the fender washer onto the screw, then the nut onto the threads

now slide a large nut approximately 3/4" between the plate and the plywood to the center of the build plate 

then even up the 1/4-20 nuts so the build plate stands off the plywood evenly

and using  a straight edge, start tightening the screws one turn at a time around the build plate evenly

when the build plate has approximately 1/16" bow in all directions loosen it and check it with the straight edge

repeat these steps, slightly increasing the bow until it is straight again.

re-install the build plate and re-check it for trueness.

If possible use a glass plate atop the heated build plate because glass is usually flat