force sensor accuracy

Dieter

Hello,

we are using an UR3e from Universal Robots. According to the manual the force sensor has an accuracy of 3.5 N. But in my experiments I feel like the robot is able to detect forces more presice being able to detect limits of 1 N in one direction and measuring values of zero point two or three digits. Do I understand the definition of accuracy in this context wrong? Can someone explain me what is meant by that? 

best wishes
Dieter

bcastets

The specification of UR sensing are quite pessimistic. As you noticed the integrated force sensor for eSerie is better in really than what can be seen on paper.

Here below are the specifications for UR3 eSerie:



Here are eSerie family specifications:



It would be interesting to have the UR definition for each of those specifications.