You also have to take into account what resolution you want from the machine. For example, a 200 step motor attached to a 10 TPI will give you a potential resolution of 2000 steps per inch or .0005 of an inch per step. However, in reality, you won’t get that type of resolution. But you do need to keep it in mind. The fewer TPI, the more course your resolution will be.
--bb99
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