URGENT NEED:TO and fro moving mechanism
actually i need a mechanism in which i want to move a small iron rod to and fro in a space of 3cm.actually its like batsmen running to take runs.i just want them to run to and fro faster.in 1 sec i want them to run 30 to 40 runs.so 30 to 40 rounds of iron rod i want in 1 sec.actually i want to exploit the persistent of vision phenomenon just lik in TV screens or monitors but in mechanical aspect.
PLZ help its urgent!!!!!!!!1