Tuesday, August 11, 2015
So far, I have machined white acetal, black acetal, and 6061 aluminum with the mill. White (or natural) acetal comes off in little tiny chips and looks pretty good. Black acetal produces long strings, like a very bad reggae style and seems to want a higher spindle speed to remove .030" at a time. But aluminum tends to clog the lead screw, so it requires oil. Acetal is self-lubricating, as it evaporates as it cuts.