Introduction: Robot Wagon
It's a wagon that is a Remote control car on tracks.
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Step 1: Things You Need
List of things needed is not a long list this is a very simple build. I built this wagon 2 times before which is why I call it Beach Bot 2.0. the first time I made it I used wheels and bike chains and gears. now this made it fast but the chains would slip off. I also didn't weld anything and when it got bumpy the bolts would raddle off. so I just broke it all down and restarted. So Beach Bot 1.0 (2nd build) I welded everything and I created chair guards to keep the chairs on the gears. The problem with this build is that it was noisy and squeaked. The bike chains held up to the torque and the wheels stayed in line. overall this was a solid build and worked but it was so loud and was too fast to put anything in the wagon safely.
Things to build it.
1. wheelchair motors
2.Snowblower track system (any set is fine you will just have to use a little thought process to figure out how to connect the tracks to the motors. I'll show I did it.)
3. Saber 2x25 speed controller (this is useful if you are using a track drive or 6 wheels or anything that's not using a steering servo)
4. Remote control system ( I use spectrum radio for RC cars)
5. wagon bed (if you want. I got a radio flyer since I originally wanted it to look like a wagon.)
but if you want a cheaper model
6. metal ( I used weldable square tube and flat steel)
7. battery ( I use a lawn and garden battery but any 12vdc battery should work. I also used a car battery both worked fine.)
8. wires ( I used
9. weather proof switch box
10. switch (I used a light switch it worked just fine)
11. outdoors electrical light cover.
12. in-line automotive fuse holder and fuse ( I use 15amp fuse but you can use up to 25 amp)
13. odds and ends as they come up. (this is not a one day project I broke a lot before I got a solid working project.)
Things to build it.
2. tools randomly
3. Pen and paper I would draw and design everything many times before I would cut and weld and wire.
Step 2: Planning Wires
I planned everything from where wires were put and the structure of the base and motors.
Connect the positive and negative cables from the motors to the ESC to the M1A and M1B for the right and M2A and M2B to the left.
Connect the positive battery lead to the inline fuse and then to the positive terminal of ESC.
Connect the negative battery lead to the negative terminal of the esc.
Use the ends of servo connectors to connect them to the radio receiver one to ch1 and the other to ch2 (or THR and STR) use mixing on the radio.
The Mixing function lets Steering, Throttle or Aux Channel follow control input made to the Steering, Throttle or Aux channel. When a mix is enabled and the assigned input control is moved, the master (primary) channel sends output at the same time the slave (secondary) channel sends output. Output is sent to the model in the direction and to the position assigned in the Mixing Screen.
on the other end of the servo wires twist the two red wire together and connect them to the 5v terminal.
twist the black wires together and connect them to the 0v terminal of the esc.
the two white wires are left connect one of them to S1 and the other to S2.
now that everything is connected. test out the setup. if it operates as you want it then move on if not reconfigure the wires first switch the servo wires and test. then switch the mixing on the radio. I wish someone would of told me this it would of save a lot of time. The default setting of the radio is pretty close to correct as it can be some fine tuning is needed.
Step 3: Frame and Body Work
Now a lot of this is completely up to you and what you are setting it up for. I measured out the motor spacing and cut two square bars and welded them to the side frames of the tracks. I measured out the height I wanted for the wagon bed and cut another two square bars, welded them to the cross bars. when figuring out the height I also had to think of the height of the battery. after that I had to make something like a shelf to hold the battery. I wanted to keep the weight as close to even as I could so I kept the motors in the back and the battery up front. To build the shelf I used leftover round bars I should of used the square bars but I ran out. On the front of the bars I welded angle bars to use as a bumper and also to keep the battery in place. I welded flat bars across to make the shelf. now I welded angle bars along the top to create the frame for the bed. but after putting the bed on I realized that if I put weight on the bed it would tilt. So had to take it apart and weld some more support so at this point I would weld in some support bars just to keep it stable. Then I welded some cross bars to square up the frame and make it more stable. Now the frame is built and stable the next step completely up to you. How to mount the motors. Since I use motors that had mounts on them I tried to use them. I ended up just playing around until I got something to work and something to spin the wheels for the tracks. I could show you but i'm not sure how well mine are mounted so its up to you.
Step 4: Final Assembly
Start putting the tracks together and put them on. Mount the motors to the frame. Place the Battery up front. Mount the light switch box in the back along the cross bar. Place the Motor controller somewhere. I used another light switch box and mounted it behind the power switch box. Wire the motors to the motor controller. Wire the battery positive wire to the fuse the fuse to the switch the switch to the motor controller. Wire the negative battery wire to the motor controller. Mount the radio receiver to the motor controller box and wire up the servo wires. once everything is wired up start tucking away the wires with some zip ties now you should have a working frame and model. Once this is tested and working the rest is all just dressing it all up and making it all your own.
Step 5: Coming Soon Phase 2
Right now i just have some speakers in and on the beach bot but soon i will be fully integrating a car stereo and speakers.