1.3.1.12 for MT2X

Just for MT2X updates,

Solved for laser bug.

if your MULTOO 3D PRINTER is MT2X, Please update this version.

filename,

1.3.1.12 500X500X500,   PRINT SIZE -  X = 500MM, Y = 500MM, Z = 500MM

1.3.1.12 500X500X600,   PRINT SIZE -  X = 500MM, Y = 500MM, Z = 600MM

1.3.1.12 500X500X800,   PRINT SIZE -  X = 500MM, Y = 500MM, Z = 800MM