hi i have recently been trying to fix my 3d printer first layers because they have been wavy. i bought this printer second hand and it it is my second 3d printer. the person before fitted a piece of glass badly glued on top of the aluminium bed and then added magnets and had removable metal beds but this meant that when you got to the top of the bed most of the heat created had gone so i removed all of this an then my first layers started being wavy. i then changed to stainless steel nozzels and changed the ptfe tubes but this didnt solve the problem so i got a glass bed and the problem is still there. can anybody advise me on what to do.
i have added some pictures below shwing what the bottom of the models look like.(there is also some warping in the corners with pla but i am not too botherd about that at the moment)
