500 E Global Operating Instructions
Maintenance
5
7.4 The blast pattern
Abrasive leaving the blast wheel blades is not thrown in all directions.
Scatter is restricted to an angle of about 80°. This is achieved through
the use of a control cage which surrounds the impeller. The position
of the window in the control cage determines the blast pattern.
Correct adjustment of the control cage and thus of the blast pattern is
the most important factor for optimum working with the 500 E Global
blast cleaning machine.
Incorrect adjustment of the control cage results in very high wear and
premature blasting-through of the liners in the blast wheel housing, as
well as reduced blasting performance and a possible loss of the
rebounce energy of the abrasive.
Fig. 7.1
1 Shot valve housing and feed spout rubber
2 cage clamp
3 Control cage
The adjustment is effected by loosening the cage clamps (pos.2) and
turning of the control cage (pos.3).
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