To make Roomba go in straight lines, you can use the virtual wall accessory that comes with it to create a straight boundary that the robot will follow. Alternatively, you can clean the Roomba wheels and sensors regularly to ensure smooth movement and adjust the wheel sensors for better alignment. Additionally, using the robot’s built-in settings for straight line cleaning and limiting clutter in the room can also help Roomba make straighter lines.

Roomba uses a random pattern to clean floors. It moves forward until it encounters an obstacle, then turns and moves in a different direction. It continues this random pattern until it covers the entire area. However, newer Roomba models use advanced mapping technology to create a more efficient cleaning pattern.

To create a virtual wall for Roomba, you can use a virtual wall accessory or create a barrier manually using tape or cardboard. Place the virtual wall accessory or tape/cardboard in the path where you want to prevent Roomba from cleaning. Virtual wall accessories emit an infrared signal that creates an invisible barrier, while tape/cardboard creates a physical barrier. Roomba will recognize the barrier and change directions accordingly.