(1) The pellets are insufficient and need to be added.
(2) The sand is piled up together, resulting in no circulation.
(3) The selected model is not equal.
(4) The direction of the directional sleeve of the throwing head needs to be adjusted by 45°, and the steel shot cannot hit the workpiece.
Remarks: It is recommended to add some steel shot to the new equipment sandblasting machine to increase the liquidity.