Carbide 3d smooth finish cut...issues

My general guideline is to scale your finishing stepover to the ballnose endmill you’re using.
10% x Diameter or greater = rough finish.
5-9% x Diameter = Decent compromise of speed and quality
<5% x Diameter = Very good quality

This means that if for example you use a 1/32" endmill, you need to take super tiny stepovers that are going to take a very long time. If you want to save time, you should use the largest diameter ball endmill you can get away with.

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