following this question, I wonder how articulation sensor work? Or what force it will sense? stress, or external force.
I build a manipulator like this, with upper arm mass 1kg:
But I’m not sure what’s the force sensor has read.
When upper arm stand with joint 0 degree, the force sensor get -9.8N:
But when upper arm lie down with joint 90 degree, the force sensor get -2.77N
considering external force, this doesn’t make sense, neither nor inner force like stress.
And I change the joint position of upper arm from side to center, get more strange result:
The force get 9.8 at any degree.
Next, I put upper arm at higher postion with joint at the side of higher postion:
But the force sensor also get -2.77N. It seems that the reading is related to the relative position of upper arm and it’s joint.
So I want to know what value does this sensor read?