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The purpose of the T1 is to help potential manufacturers evaluate production considerations involved in bringing a toy spider to market. A hands-on model makes imagining various possibilities much easier from a robotic version with cleats, armaments, and a cockpit for a small action figure to a realistic spider complete with glowing eyes, fangs and hair. There are a considerable number of possibilities.
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Most of the components for the T1 were machined but would be injection molded for high-volume production and designed around a manufacturers capabilities.
The T1 spider was initially designed with a two-part body, an upper and lower frame that separated along the center of the gears and motors. Limitations on the equipment required a redesign with smaller parts. The smaller frame pieces were sliced vertically. Four different components make up the frame and are used either 2 or 4 times. Each piece interlocks to the adjoining ones with screws used to secure the connections.
Eight legs (T1LG), connecting arms (T1CA), and upper rockers (T1UR) make up the rest of the body. The lower rocker has been replaced in the T1 with sliding joints cut into the frame pieces. As a reference, each grid on the cloth in the photo is approximately 0.130" square.
The left and right sides have completely separate drive trains. Each consists of a small motor (1.5 to 3 volt, variable speed, reversible), two stepper gears, and a crank gear. The crank gear is injection molded with a nylon gear insert and has two stems that are offset 180 degrees. All the gears are 48 diametrical pitch and 14.5 pressure angles. The final stepped gear drives two crank gears on each side. The crank is a 60 tooth gear and both stepper gears are 48 and 12 tooth with the gear attached to the motor shaft having 8.
 
The T1 is symmetrical front-to-back and mirrored left-to-right. It is held together with 12 small screws and assembled from the center outward.
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Functions for the JAVA-Challenged:
SPIDER HOME
,
PROTOTYPES
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© 2005 Klann R & D, LLC All rights reserved
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