- [Instructor] Now that we have our gears
made it to the mounting plate,
we're going to use the gear mate to mate the three gears
to one another so they can rotate in unison.
The first thing we want to do is ensure that the teeth
are properly positioned between the mating gears.
This helps in creating a realistic motion
when the gears rotate.
We want to make sure that the teeth are not overlapping.
And they appear to be good between gears one and two.
And they're also good between gears one and three.
To create our gear mate,
we're going to go to the assembly tab of the command manager
and click on the mate icon.
We'll go down and expand out the mechanical mates tab
and select gear.
For our mate selection,
we'll select the bore surfaces for gears one and two.
We now must enter in the gears ratio.
For spur gears, this is simply the pitch diameter
for the two gears that you're attempting to mate
to one another.
For this example, gear one has a pitch diameter
of 60 millimeters.
Gear two has a pitch diameter of 32 millimeters
and gear three has a pitch diameter of 45 millimeters.
So we will enter in 60 millimeters
for the first ratio box
and 32 millimeters for the second.
Note that the left ratio box is linked
to your first mate selection and the right ratio box
is linked to your second.
You can also verify that the pitch diameters are linked
to the correct gears by checking the indicator windows
in the assembly.
We have the option to reverse rotation between our gears.
We'll keep that selected for now
since the gear should rotate opposite from one another
and hit the green checkbox to create our mate.
Now we're going to test our mate by rotating gear one
and gear two appears to be rotating in the correct direction
with the correct ratio.
All right.
So now we'll line up gears one and three
to make sure that the teeth are not interfering.
If the gears had moved in the incorrect direction
we would have to go back to our mate
and uncheck the reverse direction option.
Now let's repeat the process to create a mate
between gears one and three.
So again, we're going to select the bore for gear one
and the bore for gears three
and click on the gear mate icon.
For a ratio we'll enter in our pitch diameter for gear one
which is 60 millimeters
and our pitch diameter for gear three
which is 45 millimeters.
And we'll keep the reverse box checked for now.
And create our mate.
As we test the mate, we find that the gears
are moving in the incorrect direction.
As one gear rotates clockwise,
gear three should rotate counterclockwise.
But they're both moving in the clockwise direction.
We'll open up the mate
and uncheck the reverse direction option
and hit the green check box to close out the mate.
And test it again.
Now as gear one is rotated, we see that both gears
two and three rotate while maintaining proper gear ratio.
This concludes our lesson on gear mates.
But I invite you to take some time to create more
elaborate gear arrangements using the remaining space
on the mounting plate and the three gears provided
in the exercise files.
You could also create new gears by modifying the module
and number of teeth variables in the gear part files
global variables under its equations.