Blastrac 1-8DECMKI, Operating Manual

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Operating Instructions 1-8DEC 230V
Setting the Correct Blast Pattern
5.1 Setting the Correct Blast Pattern
should be between 11:30 and 9:30 as indicated in the illustrations. The resultant-
cleaning path will determine the final setting.
These settings can vary with the abrasive size and the
surface being cleaned. Once the proper control cage
setting is obtained, the blast pattern should remain
consistent. If the pattern begins to vary, check the
blast wheel components for wear.
Control Cage “Trial & Error” Setting
The initial setting of the control cage for a machine
that has the blast wheel rotating in a counter-
clockwise direction is between 11:30 and 9:30. The
leading edge should be at 11:30. Refer to Figures A,
B and C. Place a 3/16” or 1/4” steel plate beneath the
machine and blast at full amperage for about 45
seconds. Do not move the machine during this test.
The resulting “hot spot” should be centered as it
appears on Figure B. If the “hot spot” is too far to the
left, rotate the control cage in a counter-clockwise
direction about 1/4” and recheck the blast pattern on
the test strip. Small changes in the rotation of the
contro
l cage can move the “hot spot “significantly. If
the “hot spot” is too far to the right, rotate the control
cage in a clockwise direction. Once again, move the
control cage in small increments until the blast pattern
(“hot spot”) is centered.
Note: If the blast pattern cannot be centered, check
the blast wheel and be sure it is properly mounted and
seated on the wheel hub located behind the blast
wheel. The two pins on the hub must be seated on
the back of the blast wheel before the wheel can be
secured. This check must be made whenever the
blast wheel is changed.
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