Calibrate IR

Using this block, the robot will move forward and reverse for a specific duration while collecting sample data from the IR sensor on both white and black lines.

Note:

• During calibration, ensure that the robot’s IR sensor passes over both the white and black surfaces to gather accurate reference data.
• Calibrate the IR sensor block to ensure accurate line following. This process will automatically set the threshold value based on the readings from the black and white surfaces.
• If the automatic calibration does not yield the desired results, you can manually adjust the threshold value yourself for optimal performance.

Calibration Process

• Calibrating Quarky’s Internal (in-built) IR Sensors

1. 1. 1. Prerequisite: Ensure the “initialize block” has been used before starting.
      2. Procedure: Position the Quarky Robot a few steps before the checkpoint. Begin the calibration. The robot must traverse the checkpoint and the adjacent white space (covering both black and white areas) a total of three times.
      3. Optimal Setup: It is recommended to perform this on a straight line in the arena that includes a single checkpoint.
      4. The threshold values for the left and right IR sensors will be shown on the Pictoblox screen immediately following calibration.

• Calibrating Quarky’s External IR Sensors (Pins A1, A2, or A3)

• • This procedure details the steps for calibrating external IR sensors connected to Quarky’s pins A1, A2, or A3.

• Prerequisites (Block Setup Order):

• • Start with the “initialize block.”

• • Designate the pins for the external sensors using the “change left IR to A1 pin” and “change right IR to A2 pin” blocks (use A3 if needed).

• • Only after the initial and pin-assignment blocks are set, trigger the “Calibrate IR” block.

Note: Failure to follow this exact sequence will result in the system displaying calibration values for the internal sensors instead of the connected external ones.

• Calibration Procedure:

1. 1. Placement: Position the Quarky Robot a short distance before the designated checkpoint on the line-following arena.
   2. Movement: Start the calibration. The robot must move back and forth, successfully traversing the checkpoint and the adjacent white area (covering both black and white surfaces) a total of three times.

• Optimal Physical Setup:

1. Ensure both external sensors are mounted at a consistent, low height.
2. The calibration should be performed on a straight section of the arena that includes one distinct, clear checkpoint to ensure accurate data sampling.

Result:

The resulting threshold values for the selected external pins (e.g., A1 and A2) will be displayed on the Pictoblox screen immediately after the calibration is complete.