5. Movement of Hammer
• Generally the hammer of the rock drill moves 50~120
hertz, which means it finishes 50 to 120 cycles of
movement in a second.
• We set the cycle is 50,
and the amplitude is 0.2 cm.
7. Digging Depth
• The Rock Drill digs the ground about 0.6cm in a second
• However, as time goes, the depth of digging decrease
because the ground become harder as it goes deeper
12. With this graph…
• We can find how deep we can dig with the rock drill for a
previous time
• We can find the position of the Hammer of the drill at a
previous time