The deviation of workpieces in a wire mesh belt shot blasting machine can occur due to various reasons, such as uneven distribution of workpieces on the belt, inconsistent belt tension, or belt misalignment. Here are the reasons and adjustment methods for workpiece deviation:

1. Uneven distribution of workpieces: If the workpieces are not evenly distributed on the wire mesh belt, it can cause deviation. Adjust the position of the workpieces on the belt to distribute them evenly. This can be done manually or by using automation systems, such as sensors or mechanical devices, to ensure proper distribution.

2. Inconsistent belt tension: Uneven tension in the wire mesh belt can lead to workpiece deviation. Check the tension of the belt and adjust it as necessary. Ensure that the tension is evenly distributed along the entire length of the belt. This can be done by adjusting the tensioning system or using additional mechanical devices to maintain consistent tension.

3. Belt misalignment: If the wire mesh belt is not properly aligned, it can cause workpiece deviation. Check the alignment of the belt and adjust it if necessary. This can be done by adjusting the alignment of the belt guides or using alignment devices to ensure proper positioning of the belt.

4. Belt cleaning: A dirty or worn-out wire mesh belt can also contribute to workpiece deviation. Regularly clean and maintain the belt to remove any debris or buildup. If the belt is worn out, consider replacing it to ensure smooth and consistent operation.

5. Belt speed: The speed at which the wire mesh belt moves can affect workpiece deviation. Adjust the belt speed to a suitable rate that provides proper transportation of the workpieces without causing deviation. This can be done by adjusting the speed control system of the machine.

It is important to regularly inspect and maintain the wire mesh belt shot blasting machine to prevent workpiece deviation. By addressing the above-mentioned reasons and making necessary adjustments, the deviation can be minimized, leading to improved efficiency and quality of the shot blasting process.