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Modeling, Scripting and Animating Gears

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Date Added: 7th May 2013
Software used:

Calculate the Size of the Teeth

If we take cog20 as an example, it is a cylinder with a radius of 10 units and 20 teeth (subdivisions). We can discover the size of the teeth by calculating the circumference of cog20 and dividing it by 20 (Fig.26).

1713_tid_fig26.png
Fig. 26

The circumference of a circle is calculated as: 2? * radius

Where ? (Pi) = 3.14159, the circumference of cog20 is:

= 2? * radius
= (2*3.14159)*10
= 62.831

Therefore, the size of the teeth is 62.831/20 = 3.14155 units each.
A door with 10 teeth (subdivisions) would be 31.1415 units in height.
A door with 50 teeth (subdivisions) would be 157.077 units in height.
And a door with 20 teeth (subdivisions) would be 62.831 units in height.

Select pCube1 and modify values by opening the Channel Box. In the Shape Node, set the values to as follows (Fig.27):

? Width: 10
? Height: 62.831
? Depth: 40
? Subdivision Axis: 20

1713_tid_fig27.png
Fig. 27


Select the alternate faces. Extrude and scale them as indicated in Fig.28.

1713_tid_fig28.png
Fig. 28

Delete History and Reset Transformation. Rename pCube1 as "door".

The gear system should now be set up as indicated in Fig.29, containing five gears ([A] - [E]) and a door. The aim is to rotate gear01 [A] and cause door [F] to translate (move) up and down.

1713_tid_fig29.png
Fig. 29





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Readers Comments (Newest on Top)
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Riccardo on Tue, 02 July 2013 6:11pm
Thank you very much! Great tutorial!
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SirFunk on Wed, 26 June 2013 11:15pm
Awesome, thank you man :)
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Kumar Jeetu on Tue, 07 May 2013 10:58am
nice tutorial
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