In order to make a 3D channel letter, you need various equipments to cooperate with each other in the traditional way, for instance, CNC router, cutting machine, engraving machine, bending machine, welding machine, etc. However, just one machine will be enough to make an entire 3D channel letter in the modern way. That machine is called 3D channel letter machine, or 3D signage printer, or just 3D sign printer, it can make the entire channel letter automatically and efficiently, including letter front (letter face), letter side (letter edge), and letter back (letter bottom).