More Options
Use this section to set motion relative to another part, and to select
components for Load-bearing
Faces/Edges to transfer them to SolidWorks Simulation.
To set options:
Click the blank text area under More
Options and select a part on the assembly to which to reference
motion.
Click the reference part 
text
area and select the point on
the assembly for the reference origin.
Click the load-bearing face 
text
area and select the load-bearing face in the graphics area.
Notes
Motors move components in a selected direction,
but they are not forces. Motor strength does not vary based on component
size or mass. For example, a small cube moves at the same speed as a large
cube if you
set the velocity of the motor to a given value in both cases.
If something
causes the reference point of the motor direction to change, the motor
continues to move the component in the new direction. This can occur,
for example, if there is a collision between the component that is moved
by the motor and another component.
Do not add more than one motor of the same type
to the same component.
Motion due to motors supersedes motion due to
any other simulation element. If you have a motor moving a component to
the left, and a spring pulling a component to the right, the component
moves to the left, while the power consumption of the motor increases.