Drive System
The Micromouse will be using two-wheel drive system where the drive system will consist of two motors which will be connected to the drive wheels with casters providing balance. There are several types of motors available in the market. However, DC electric motors are the most appropriate for robotics applications because they are reliable and easy to use, come in small sizes suitable for robots and are powered by DC electric batteries. There are three types of DC electric motors commonly found in robots which are continuous DC motor, servo motor and stepper motor. Among these motors, stepper motor has an added advantage due to its capability to produce a precise incremental shaft rotation and can hold their position and resist turning. This is very important to ensure that the Micromouse is able to stop, speed up and turn quickly and precisely. Therefore, 2 units of Sanyo Denki stepper motors model 103H546-0440/1 with shaft rotation of 1.8 degree/step will be used with stepper motor driver to control the motors.
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| Sanyo Denki stepper motors model 103H546-0440/1 |
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| Stepper Motor Controller from Microrobot |
This stepper motor controller uses two units of SLA7024M a high current PWM, unipolar stepper motor drivers. The input to these drivers will be controlled directly from the microcontroller, PIC 16F877A.
Reference:
Reference:
http://www.robotstorehk.com/micromouse/doc/AIRAT2%20USER%20MANUAL%28ENG%29.pdf
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