vb.net barcode reader BUILD A ROVERBOT in Software

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332 BUILD A ROVERBOT
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Cross beam Top view FIGURE 21.11 Construction details for the top of the riser. a. Side view showing the crosspiece joining the two riser sides; b. Top view showing the cross beams and the tops of the risers.
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Cross beam
11/2" x 3/8 bolt
Fasterner detail Riser FIGURE 21.12 Hardware detail for attaching the risers to the cross beams.
FROM HERE
FIGURE 21.13 The finished Roverbot (minus the batteries), ready for just about any enhancement you see fit.
From Here
To learn more about
Constructing robots using metal parts and pieces Powering your robot using batteries Selecting a motor for your robot Operating your robot with a computer or microcontroller
Read
10, Building a Metal Platform 15, All about Batteries and Robot Power Supplies 17, Choosing the Right Motor for the Job 28, An Overview of Robot Brains
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BUILD A HEAVY-DUTY SIX-LEGGED WALKING ROBOT
et s be honest with each other. Do you like challenges Do you like being faced with problems that demand decisive action on your part Do you like spending many long hours tinkering in the garage or workshop Do you like the idea of building the ultimate robot, one that will amaze you and your friends If the answer is yes to all these questions, then maybe you re ready to build the Walkerbot, which we will describe in depth in this chapter. This strange and unique contraption walks on six legs and turns corners with an ease and grace that belies its rather simple design. The basic Walkerbot frame and running gear can be used to make other types of robots as well. In 23, Advanced Locomotion Systems, you ll see how to convert the Walkerbot to tracked or wheeled drive. The conversion is simple and straightforward. In fact, you can switch back and forth between drive systems. The Walkerbot design described in this chapter is for the basic frame, motor, battery system, running gear, and legs. You can embellish the robot with additional components, such as arms, a head, computer control, you name it. The frame is oversized (in fact, it s too large to fit through some inside doors!), and there s plenty of room to add new subsystems. The only requirement is that that weight doesn t exceed the driving capacity of the motors and batteries and that the legs and axles don t bend. The prototype Walkerbot weighs about 50 pounds. It moves along swiftly and no structural problems have yet occurred. Another 10 or 15 pounds could be added without worry.
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336 BUILD A HEAVY-DUTY SIX-LEGGED WALKING ROBOT
Frame
The completed Walkerbot frame measures 18 inches wide by 24 inches long by 12 inches deep. Construction is all aluminum, using a combination of 41/64-inch-by-1/2-inch-by1/16-inch channel stock and 1-inch-by-1-inch-by-1/16-inch angle stock. Build the bottom of the frame by cutting two 18-inch lengths of channel stock and two 24-inch lengths of channel stock, as shown in Fig. 22.1 (refer to the parts list in Table 22.1). Miter the ends. Attach the four pieces using 1 1/2-inch-by-3/8-inch flat angle irons and secure them with 3-by-1/2-inch bolts and nuts. For added strength, use four bolts on each corner. In the prototype Walkerbot, I replaced many of the nuts and bolts with aluminum pop rivets in order to reduce the weight. Until the entire frame is assembled, however, use the bolts as temporary fasteners. Then, when the frame is assembled, square it up and replace the bolts and nuts with rivets one at a time. Construct the top of the frame in the same manner.
FIGURE 22.1 Cutting diagram for the frame of the Walkerbot (two sets).
TABLE 22-1
PARTS LIST FOR WALKERBOT FRAME.
4 4 4 8 4 2 Misc
24-inch lengths 41/64-inch-by-1/2-inch-by-1/16-inch aluminum channel stock 18-inch lengths 41/64-inch-by-1/2-inch-by-1/16-inch aluminum channel stock 12-inch lengths 1-inch-by-1-inch-by-1/16-inch aluminum angle stock 1 1/2-inch-by-3/8-inch flat angle iron 24-inch lengths 1-inch-by-1-inch-by-1/16-inch aluminum angle stock 17 5/8-inch lengths 1-inch-by-1-inch-by-1/16-inch aluminum angle stock 8/32 stove bolts, nuts, tooth lock washers, as needed
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