So when I start a print, the level of the bed level should rise till it comes in contact with the nozzle and then move to the bottom left corner of the printer (on the x y axis). Instead, my bed level keeps on rising and does not stop! (jams up against the nozzle) I have to turn off the printer fearing that it will cause damage to the nozzle. I do not know how to fix this problem. Please help!!!