The Robot in this instructable was a participant in the Ontario Technological Skills Competition Robotics Team of Four built by a bunch of grade 12 high school students with no previous experience in robotics. As the title suggest the robot is based on the design of a forklift. The purpose was to create an engineering project to encourage individuals with different skill sets to form cooperative teams to design, fabricate and operate a robot. It was expected of us to use some newly purchased and recycled parts or components (motors, gears, etc.) to fabricate a robot consisting of mechanisms which would allow it to complete the simple task of picking up wooden cubes with dimensions 3.5 by 3.5 by 3.5 inches and dropping the cubes in a bin with diameter of 36 inches and height of 18 inches.Apart from the motors and the electrical system everything else was designed and built from scratch.
Step 1: Task
Step 2: Parts Needed
One of : Spektrum DX6 DSM 6CH Park Flyer System
One of : Sabertooth Dual 25A Motor Driver
Two of : HM-50 Waterproof Marine ESC Electric Speed Controller for R/C Model Boats (50A)
Two of : Scooter Motor 12Volts120W, DC Motor.
One of : 12V Brushless Motor
One of : 12volts 50watts Windshield Wiper Motor to be used as a winch
Two of : 15 amp 32 volts fuse
Aircraft wire rope
Scrap pieces of wood
Two of : Small Tires.
Two of : Trolley wheels(shopping cart wheels)
Step 3: Design and Measurements : Sides
Step 4: Design and Measurements : Top
Step 5: Mounting the Wheels
Step 6: Mounting the Body
Step 7: The Rails and Lift System
Step 8: The Arm
Step 9: The Gripper Unit
The threaded rod passes through a nut which is secured inside the piece of wood.
When the motor is turned on, the threaded rod spins making the piece of wood move.
Step 10: Wiring Schematic
All the Negative Wires were connected to the Battery in Parallel.
Here is a link to help with the wiring of the Sabertooth dual 25A motor driver :
We soldered a 1N4004 Diode to a push switch which connected to the gripper motor. Whenever the piece of wood would move back to drop the cube, it would make contact with the switch shutting the motor off.This was only done to facilitate our completion of the task.
Step 11: Wiring
- Wire with the Blue tip connects to the Positive Terminal of the 12V Battery.
- The Wire on the Right side of the Blue tip connects to the Negative Terminal of the 12V Battery.
- Here is a link to better understand the wiring :