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Has anyone made a ceramic mold for aluminum? Looking for a good surface finish out of the mold.

Took this logo from the internet, ran it thru Deskcnc, after about 3 seconds got over 42,000 lines of code & here it is (attach.) Could have got more detail with a smaller cutter but all I had was a 1/16" ball end mill. I have a Taig mill with a Sherline 4th axis all with servos from Imservice...

I have a 4 axis Taig mill with servos on it & was having problems making molds. I was getting irregular step over, detail areas were rounded over instead of sharp plus other types of steps in the part. After trying to figure out the gib thing, it helped a little but not what I wanted. After...