Mechanism Design and Mechanism Dynamics > Mechanism Dynamics > Other Measures > About Comparing Net Load and Connection Reaction Measures
  
About Comparing Net Load and Connection Reaction Measures
Be sure you understand the difference between the values that you obtain when you apply net load measures or connection reaction measures to motion axes.
A net load measure for a motion axis measures the sum of all the applied loads defined on the motion axis. It only includes friction force or force due to springs, dampers, force motors, and servo motors.
The connection reaction measure along the degrees of freedom is the sum of all the forces on the connection due to friction or due to reaching a motion axis limit. For example, in a pin connection, the axial moment measure provides friction and connection limit force, whereas in slider connections, the axial force measure provides friction and connection limit force. The connection reaction measure along the degrees of freedom does not take other applied forces into account.
If you lock the connection in an analysis, the measure value includes the force from all other load entities, including springs and force motors, that act along this motion axis. Damper forces are zero in this case.