Ingredients

Creating a good animatronic figure that is able to perform constantly without fail requires many special skills and LOTS of technical know how.  Before assuming the task of creating an animatronic  figure, you  should have a strong hold on how these things are constructed and be willing to spend a pretty penny on equipment and materials.   Here's a rough list of things you should need and consider if you decide to build an animated figure.   

1.  Careful planning must be done.  Decide what your figure is going to look like and what it will be doing.  Sketch out a rough drawing of your dream animation figure.  Consider what will me moving, what will move it, how it will move and what will control all the movements.  You may choose to manually operate your figure or you may choose to have a computer operate it.  You may want to have it operate continuously or in intervals.  Will electric motors be used to make movement, air pressure (pneumatics) or will it be hydraulic (Pressurized hydraulic oil).  Will your figures internal structure support be made of metal or wood?  Metal is preferred for strength.
2.  Buy parts.
     A.  Metal is a must.  You need structural support.  Knowing how to cut and weld metal is a HUGE plus.
     B.  Bearings and bearing collars.  Size of the joints in your animation will determine bearing size.
     C.  Actuators or motors.  These will do the moving of body parts
     D.  Hoses, fittings and mounts (If pneumatic or hydraulic) for actuator mounting and connecting
     E.  Regulators and flow controls
     F.  Machine screws (all sizes) with nylon lock nuts and washers
     G.  Air compressor or hydraulic pump
     H.  Animation control computer (if automated movements are desired)
3.   Put it together!  I'm not gonna go into how and give all my secrets away.  I'm just giving you some starters here!   Use your imagination and develop technique and style.  Having good electrical and mechanical skills would be a good thing.
Note: Equipment that will make the job a lot easier include a band saw, drill press, grinding wheel with wire brush, a vise, a 110-120 volt 90 amp mig welder with face shield/visor and basic hand tools.
4.   Have Fun!  Be Creative!  Be Safe!

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Cylinders of all sizes

 

Cylinders or "Actuators" are the life blood of animatronics.  Cylinders can range in size from many feet in length to as small as a pencil tip.  In construction for example, large cylinders are used move cranes and dump the contents from a dump truck bed.  In animatronics, usage's can range from moving a giant dragon many stories tall to an eye blink in a small bird.  There are many companies that manufacture pneumatic and hydraulic cylinder actuators.

SMC, Bimba Clippard and Tolomatic  are the most recognized brands of hydraulic and pneumatic cylinders and accessories.

And they get even smaller!

 

Now where?