Section 1: The MicroBlaster MB1006
MicroBlaster MB1006
Comco Inc.
1-4
Issue Date: September 2003
How the MicroBlaster MB1006 Works
(c
ont’d)
Stepping on the footswitch used to operate the MicroBlaster causes two things to
happen:
1)
The hose pinch (shut-off) assembly for the selected tank opens, which
allows air to flow from the nozzle. Refer to Figure 1-3, item 1.
2)
An electrical signal is sent to the coil of the modulator assembly which
energizes and de-energizes it 60 times every second. Refer to Figure 1-
4, item 2.
At the beginning of the operating cycle (as shown in Figure 1-3, below), the hose pinch is
opened. Before the modulator has had a chance to energize, regulated air flows freely through
the open modulator valve, the mixing chamber, and out the nozzle.
Figure 1-3: Modulator Open
Since the air flowing from the regulator into the mixing chamber is at basically the same
pressure as that in the tank, the upward force of air keeps the abrasive in the tank. At this point,
little or no abrasive is being injected into the air stream.