Dillon DynaSwitch - Manual (Page 11)

11
2-4
Other Installation
Possibilities
Figure 2-E and 2-F show other uses for the Dynaswitch when either
tension or compressions loads are present.
Batching operations at preset load
points are greatly simplified by
means of economical Dillon
Dynaswitches. Figure 2-E shows a
typical hopper with 3 point suspen-
sion. Dynaswitch under one sus-
pension point is set for 1/3 maxi-
mum load. It opens hopper gate
automatically at this point. Contents
of tank should preferably be liquid,
since solid materials tend to pile
and cause erroneous results.
Figure 2-E
Figure 2-F
Figure 2-F shows an example of using the Dynaswitch in an automatic
control function. Sand used in foundry operations is brought up from the
floor below by conveyor. It falls into the chute and then spills into the
hopper. The hopper itself is suspended from the Dynaswitch at upper left.
The Dynaswitch is set to open the conveyor motor circuit at 1000 pounds
which represents a full hopper. At the same instant, a trap in the bottom of
the hopper also opens permitting contents to flow out into a mixer below. A
time delay switch on the hopper trap holds it open until all sand has been
discharged at which time the reduced load on the Dynaswitch causes it to
again close the conveyor motor circuit and repeat the cycle endlessly.
The Dynaswitch is also acting as a precision scale since it is set to func-
tion at a specific load point. Any form of batching operation can be easily
automated by this simple arrangement.