3 magnets provide a resolution of released line of 3 pulses per revolution. Depending on how much line is wound on the wheel and how much is released, the length of the line varies per magnetic pulse. The average length is 183mm per pulse or vice versa 5.45 pulses per meter. With 6 magnets, the precision is doubled. The precision of the calculation of emitted line is affected by the following factors.. How the line is wound up. For example, on one side or centrally. How tightly the line is wound up. How elastic the lineis. In addition to these, the diameter of the line and the amount of line wound on the wheel should be set in Ex.