Pin Router Duplicator

Results:

The finished 4 bar linkage system produced the final applied forces, which are as follows: Position w/out router (25.8lbf), neutral position 35.8lbf, 45.8lbf, 55.8lbf, and 65.8lbf. For each applied force, the deflection was measured to determine the spring rate. With the spring that is provided by Professor Beardsley, the spring rate came out to be 14lbs/in, which was under the predicted value of 15.5lbs/in. For the second test, the new spring came out with a spring rate of 18.34lbs/in, which meets the success criteria of the project. One testing issue that occurred is that the first spring that's provided by Professor Beardsley was too short, so welding wire was used to attach the spring to the two plates. Overall, the predicted and calculated values are within 10-15% of each other. The testing was valid because the spring deflection was measured five times to ensure accuracy. In conclusion, the purpose of this test was to determine the spring rate of the springs, to be used as a counterbalance, which came out to be a success.