1. Introduction-
This is a primer project which covers following concepts-
This is a primer project which covers following concepts-
· Power Supply.
· DPDT switch operation.
· D.C. Motor.
· Basic motion of Robot
2. Tools & Components –
There are following tools are required for this project-
· Soldering iron
· Hack saw/ blade
· Screw drivers
· Multimeter
· Pliers
· Wire stripper
· Spanner
· Hammer
There are following components are required for this project-
· Battery (6 volt , 4.5 Ah) - 1 nos.
· DPDT Switch- 2nos.
· Ribbon wire strip- 3 meters+
· D.C. motor- 2nos
· Chassis(having holes for motor) - 1
· Remote box 1
· Metal strip 12
· Wheels 2 nos.
· Castor wheel 1nos
· Soldering wire - as required
3. Procedure-
1. PAPER PLANNING:
Before you start making your robot you need a paper plan.
Measure length of the motor (excluding shaft), diameter of
shaft of the motor, inner hole diameter of the motor. Draw a
rough sketch of the base you need to cut keeping in mind
the placement of motors and wheels.
Holes to fit caster wheel
Holes for wiring
 |
| Top View |
Caster wheel
Holes to fit caster motor
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| Side View 2. Mechanical Assembly Fit the caster wheel at position show in above diagram with 1.5-2 inches (approx.) screw. Fit the dc motor into the holes of chassis and couple the wheel by using screw or rubber tube.  Bolt is to fit outside of chassis Coupling motors and wheels 3. Remote Designing- Before designing remote we have to learn basic movement of robot which is shown in following table.
To make anti-clockwise motion of motor, the polarity of supply must be inverted of polarity of supply in clockwise motion. For "Polarity Reversal" DPDT switches are generally used. This can be done by using following circuit.  DPDT Switch Connections for REMOTE The wire should solder on metal strip not on switches directly (as shown in fig 3). This precaution helps us if there is wrong connection occurs in circuit. So we can change the circuit by changing metal strip position (fig 4). The procedure is shown in figure below-  DPDT Connections 4. Motor connections- There are 4 output wires from remote which is to solder on motor by ribbon wire strip. Switch1's output should connect motor1 and switch 2's on motor2. This means switch1 controls motor 1 and switch 2 controls motor2. Before connecting motor by soldering, the polarity of motor should be check buy giving direct supplyfrom battery. 5. Power Supply- The rechargeable battery of rating 9 Volt and 4.5 ampere rating should connected with remote switch (as shown in fig). 4. Speed calculation of robot- Speed of robot can be calculate by following formula- Velocity = circumference * rpm Velocity = diameter * pi * rpm OR Velocity = 2 * radius * pi * rpm The RPM of motor will perfect match with its specification if only is power rating of motor is provide by power supply. |
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