A CNC machine has been programmed to drill 10 blind holes in a piece of flat plate. Each hole has a
depth which increments from the previous one by an amount derived from an arithmetic progression
(AP).
Hole 1 has a depth of 2 mm.
Hole 10 has a depth of 29 mm.
Calculate, using an analytical method, the common difference of the hole depths.
Ignoring the pull back and repositioning times, calculate the total time spent cutting metal
if the spindle feed rate is set at 2 mm/sec.
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