ME 581 – H03
Name ________________________
1) View the web cutter video “wc.mov” from the class web page. JPG images are provided in
“wc_images.zip”. Be certain to read the “read_me.txt” file within the ZIP.
Use suitable software to digitize the location of revolutes A, B, C and D for at least one full
revolution of the crank link 2. Compute the angles  2  3  4 as shown below.
2) Plot angles  3 and  4 as functions of angle  2 .
3) Calculate and plot 2 as a function of time using simple finite difference and using
Savitsky-Golay floating interpolants. Comment on the two methods. Determine the mean
value of 2 and root-mean-square (RMS) about the mean value.
mean 2 ____________________
VWEB
RMS 2 about mean 2 ____________________
P
C
Web
Q
4
3

 
2
 
B
A
 
D