ABB PFEA 112 - Force Calculation for Measurement with a Single Load Cell; The most Common and Simple Solution

Tension Electronics PFEA111/112, User Manual
Section D.7 Force Calculation for Measurement with a Single Load Cell
3BSE029380R0101 Rev C D-7
D.7 Force Calculation for Measurement with a Single Load Cell
In some cases, it is sufficient to measure the tension with only a single load cell mounted at one
end of the roll. The roll should nevertheless be supported at both ends.
D.7.1 The Most Common and Simple Solution
The most obvious and simple solution is horizontal mounting with the web evenly distributed
and centered on the roll.
As long as the roll is supported at both ends, the calculations given in Section D.6, Mounting
Alternatives, Calculating Force and Calculating Wrap Gain are valid. Note that the output signal
is a summation.
NOTE
The accuracy of a single load cell measurement is highly dependent on how well
the center of force can be determined. Since the cross-directional stress
distribution generally is somewhat uneven, this is not easily done. The load cell
will, however, produce a stable and repeatable measurement.
Figure D-2. Cross-directional stress distribution