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MAKING THE BASE    123



                    Table 12-1  TinBot Parts List

                    1            Simpson  Strong- tie TP35 nail plate (measures 3-1/8″   5″)*
                    1            Simpson  Strong- tie TP37 nail plate (measures 3-1/8″   7″)*
                    2            Simpson  Strong- tie LSTA9 straps (measures 1-1/4″   9″)*
                    2            Standard- size R/C servo motors, modified for continuous rotation†
                    2            2-1/2″- or 2-5/8″-diameter wheels, with hubs for attaching to the servo motor†
                    2            Plastic servo motor mounts‡
                    4            Metal corner angle (“L”) brackets, approximately 3/4″   1/2″ wide§
                    1            1-1/4″ swivel caster¶
                    1            1/4″ plate for swivel caster
                    6            6-32   3/8″ machine screws
                    2            6-32   1/2″ machine screws
                    8            6-32 nuts
                    14           #6 washers
                    16           4-40   1/2″ machine screws and nuts
                    8            #4 washers

                   * These items are commonly available at most hardware and home improvement stores.
                   † Servo motors may be found at any hobby store selling radio control parts. You will need to modify the motor for continuous
                    rotation, or purchase the motor already modified for continuous. The wheels must have hubs that match the spline type of
                    the servo motor, either Futaba or Hitec. See Chapter 23 for details.
                   ‡ Directions for making these is found in this chapter. Or you may use most any  ready- made plastic or metal servo mounting
                    bracket. These are available from specialty robotics Web sites; see Appendix B.
                   § First choice is a Keystone model #619  tin- plated bracket (available through a variety of online sources, such as Mouser and
                    Allied; see Appendix B). Each “leg” measures 0.687″   0.687″ and the bracket is 3/8″ wide. Or you may substitute for
                    the slightly larger 3/4″   1/2″ wide corner angle bracket, commonly found at hardware and home improvement stores.
                   ¶ As necessary you can substitute the 1-1/4″ caster for a 1-1/2″ model.















                                                        Figure 12-1  The completed TinBot, made with
                                                        common metal plates found at the hardware or
                                                        home improvement store.









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