Calculating the Degrees of Freedom

[jojosg]

Homework Statement

Compute the degrees of freedom of the mechanism in Figure 1, and specify if there are any coincident joints, redundant constrains and idle degrees of freedom.

Relevant Equations

Gruebler's Equation: 3(n-1) -2 jp - jh
n= total number of links including frame
jp = total number of primary joints (pins or sliding joints)
jh = total number of higher-order joints (cam or gear joints)

Just unsure if I did it correctly. I identified G as an idle Degree of Freedom. Should I exclude it from DOF calculation? But is I do that The Current DOF would be more than 2 which is definitely the wrong answer.

 

[sbrothy]

I'm the site's autodidact mascot (or court jester , if you will) I realize this is a first draft, and I have no idea what level you're at, or what is expected of you in the articulation of your solution. But it seems to me that it wouldn't hurt training towards formulating your solution in more serious terms.

Sorry, I should really stay out of stuff like this, but sometimes I can't help myself. If nothing else your thread got bumped to the top.

 

[wrobel]

The mechanism ABCD by itself has 2 degrees of freedom