Whats are the benifites of milling mechanism?
Machines have to have parts, that's a given. As machines obtain more and more complex so do the parts that make them up. Since a lot of machinery requires metal parts, here are effectively two options to make complex parts: cast and machining. Unless the number of parts is extremely high, casting can be expensive. Molds own to be made, furnaces bought, exact casting mixes maintained, etc. On the other mitt, with a mill, you can take a single block of a given metal and cut away until it is the shape required.