55$ homemade arduino cnc milling machine 3D result

Homemade mini cnc...<br />Milling plaster (gypsum) block custom molded.<br />Arduino uno r3 + cnc shield with a4988 stepper drivers<br />28byj - 48 step motors<br />alu l profile for linear rails + small ball bearings<br />bunch of nuts and bolts<br />grbl arduino library