Robo3D warped bed fix (high center/low sides)

thingiverse

THIS FIX IS NOT FOR EVERYONE. If your bed is flat from front to back but you notice that extruder tip gets closer to the bed as it passes center of the bed and drops down toward the opposite end, then this fix is for you. Used old threaded rod left from Z axis. Nuts and adjusting bolt are specified in the picture. When tension is applied by the screw, screw pushes against the bed (there is a pushpin between the bed to keep it from scratching) it pushes center of the bed down or pulling the sides up (not sure which) flattening it for me. I only needed to put one of those at the front. You may have to use two. Try one out on both ends to see if one fixes the problem all the way. Good luck . I guess here is no such thing as FLAT in robo3d printers. This was my 3rd bed. 1st was broken, second was warped beyond acceptable and this one is no where perfect without this device.