Hi,
I just finished getting my mill cnc capable, and thus far have tried doing some engravings ect... just to get things figured out. I'm attempting to make a key chain, and I have some aluminum stock shims that are 1"x4"x0.06" for the material. I'm attempting to radius the corners and simultaneously cut 0.5" off one end. This also included a hole for the key chain loop. Well, the bit turned bright red, I stopped it, reduced the cut depth, turned the bit around to use the other end, and now have one ruined 1/8" endmill. Here is the setup:
-HSS 1/8" 4 flute endmill
-Spindle speed 4200 (I calculated 3055, but the belt steps between 2600 and 4200)
-Feed Rate 3 IPM
-no coolant (do not yet have the capability)
I have attached the G code file as well, PLEASE TELL ME WHERE I WENT WRONG!