Low amperage readings on a centrifugal blasting machine may indicate which issue?

A low amperage reading on a centrifugal blasting machine is indicative of an abrasive starved wheel. When there isn't enough abrasive material being fed into the blast wheel, the motor doesn't have to work as hard to spin the wheel, resulting in lower amperage readings. This condition can lead to ineffective blasting as there isn't sufficient abrasive to achieve the desired surface preparation or cleaning.

Proper abrasive flow is crucial for maintaining optimal performance and achieving effective blasting results. If the wheel is starved of abrasive, not only does it reflect in the amperage reading, but it also can significantly impact the overall efficiency of the blasting operation, resulting in poor surface results.

In contrast, issues such as electrical connection failures, dust filter blockages, or misalignment of the wheel would have different implications and effects on the performance and amperage readings of the machine.