jolphil: Hi, How much variation is in the wire itself or the thickness of the insulating coating? How would this effect your project? Goodluck, jolphil
There is enough variation that taking several 0.001 precision measurements of the wire and using an average to calculate the amount of turns (coil_length / wire_diameter) yields inconsistent results. This can be due to the coating or other imperfection in the wire. This affects my project because I aim to make "multi-layer" coils and so I need to be able to stop exactly at the "lip" of the coil before reversing the direction of coiling.
If there is still a gap left between the wire and the coil lip, the reversal is problematic.