CR-10 Gantry Levelling Blocks

thingiverse

use these gantry levelling blocks to make sure the gantry of your printer is level! place them on your frame, and lower the x axis gantry BY HAND (disable steppers and spin the z axis leadscrews by hand) as soon as one side of the gantry touches it, you can see how far from level it is, and lower the other side so they are both flat on the blocks. then use the control box to move the z axis up, which will engage the steppers and keep it in the proper position!