Detecting Interference
You can use Motion Studies to check for interference in your
design as the parts move. You can check any of the components in your
SolidWorks assembly model, regardless of whether
a component participates in the motion model.
Using the interference detection capability, you can find the
following:
Interferences that occur between the
selected components as the assemblies move through a specified range of
motion.
The place where the first interference
occurs between the selected components. The assembly is moved to the position
where the interference occurred.
To initiate an interference check between components:
Right-click the assembly in the MotionManager
design tree and select Check Interference.
The Find
Interferences Over Time dialog box appears.
Click in the graphics screen and select
two or more components to appear under In Parts and Frames.
Set Start Frame
to the motion frame to use as the starting position for the interference
check.
Set End Frame
to the motion frame to use as the final position for the interference
check.
Increment
sets the increment between frames checked. For example, setting the increment
to 2 checks every other frame, starting at the frame set in Start
Frame.
Select Find Now
to start the interference check.
The list at the bottom displays detected
interferences. The frame, simulation time, parts that cause the interference,
and the volume of the interference detected are listed.
Selecting the Index number
for an interference enables the Details and Zoom to Selection 
buttons:
If necessary, click Stop
to stop the check.
To clear all selections and select
new components to check, click New Search.