How does our variable peck drill cycle calculate the depth of each peck?
Our ProtoTRAKs use a formula called sum of the digits. It calculates the depth of each peck by summing the number of pecks, dividing by the total and multiplying it by the total depth (Z rapid to Z end). Please see the example below: Using 4 variable pecks, the control will sum the number of pecks as follows: 1 + 2 + 3 + 4 = 10 (if it was 5 pecks, it would be 1 + 2 + 3 + 4 + 5 = 15). It then divides 1/10, 2/10/, 3/10 and 4/10 pecking more frequently as it drills deeper. If the Z rapid is .100 and the Z end is -1.000, the total depth is 1.100. The first peck will then be at -.440 from Z rapid (4/10 x 1.100); the second peck will be -.330 deeper (3/10 x 1.100) until the drill reaches Z end for the final peck.
