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Gravimetric Batch Blenders w/Mitsubishi Control Chapter 3: Installation 35
Load Cell Adjustment
The mechanical setup of the Slide Gate/Auger blending system involves the adjustment of the
weigh hopper load cells (Please refer to the figure below). This figure illustrates the proper
adjustment of the load cell mechanical stop bolt. The setting for the positive stop is necessary
to prevent the load cell from being “over-ranged” by excessive loading on the weigh hopper.
The setting for the load cell stop is forty thousandths of an inch maximum (.040”). A feeler
thickness gauge, with the weigh hopper empty, should be used to set this.
If a feeler gauge is not available, the weigh hopper should be filled with the material that is to
be blended, and the stop adjusted so there is just a very small gap (a couple of sheets of
notebook paper) between the load cell, and the blender base stop. This will allow the load cell
to operate without mechanical restrictions and provide an overload safety. To adjust the stop,
adjust the screw located on the bottom of the load cell. Adjust the screw up to increase the
gap and down to decrease the gap.
Note: THE WEIGH HOPPER ASSEMBLY MUST HANG FREELY AND BE FREE
FROM FRICTION, WITH NO MECHANICAL OBSTRUCTIONS OTHER
THAN THE LOAD CELL ITSELF.
Figure 20: Load Cell Mechanical Stop Adjustment
LOAD CELL
.040" GAP
STOP ADJUSTMENT
BOLT