Z axis dial, nema17 step shift indicator

thingiverse

To verify that both NEMA 17 Z-axis motors are in the same step phase is straightforward. This ensures your bed level will be accurate, and you won't need to calibrate it if one motor accidentally moves a step or more without being noticed. You have three needle options: one with no screw or nut, another for M2 screws and nuts, and a third for M3 screws and nuts.