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5.4
Adjusting the blast pattern
Correct adjustment of the control cages and thus of the blast
pattern is a very important factor for optimum working with the
2-30DS blast cleaning machine.
Incorrect adjustment of the control cages results in very high
wear and premature blasting-through of the liners in the blast
wheel housing, as well as reduced blasting performance, uneven
cleaning and a possible loss of the rebounce energy of the
abrasive.
The adjustment is effected by removing the feed spout (3),
loosening the cage clamps (1) and turning of the control cage
(2).
The control cages have lateral
windows indicated by the cast
grooves (1 + 3). The positions of
the windows determine where the
abrasive is fed onto the blast
wheels and where it hits the surface
to be treated.
The turning direction of the
blastwheels is indicated by 2 + 4.
Every time the control cage is
adjusted or replaced, the thread of
the blast wheel fastening screw
should be checked. Make sure that
this screw will be tightened
correctly. In addition, absolute care
must be taken to clean the thread
from dust and abrasive.
5.5
Setting the control cages:
The cast grooves on the control cage show the position of the control cage opening (1 + 3).
The following adjustment standard value is valid: the control cage opening is approximately opposite to
the throwing angle. The abrasive grain size plays an important role here. Different types of abrasive have
different throwing characteristics due to their different weights and frictional resistance.
This means that you must never use different types of abrasive at the same time.
The adjustment can be carried out as follows:
-
Determine the upper and lower edges of the windows. (watch the cast grooves 1 + 3)
-
Set the upper window edge of the left-hand control cage (1) to imaginary 11:50 of a dial.
Set the upper window of the right-hand control cage (3) in a laterally inversed way.
1
2
3
