Diagnosing Hello World

[WillAdams (William Adams (Carbide 3D))]

Image here

http://www.shapeoko.com/wiki/index.php/Shapeoko_3#Bill_of_Materials_.28B.O.M..29

set screws are the small black screws in front. Two are used per pulley

Mystified by why one has a 5mm bore though.