Delta RMC151 User Manual Page 93

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3 Controller Features
Notice that it is not possible to calculate resultant force on the rod with only one pressure
transducer because the pressure on the other side of the cylinder is unknown.
Differential force can only measure the force applied to the piston due to the hydraulic
pressure. The resulting force applied to the external load is also affected by the friction in the
cylinder. For this reason, a load cell may be more accurate than differential force.
Required Equipment
Differential force requires the following:
Two Identical Pressure Transducers
The measurement range and output ranges must match on order to use the scale and
offset wizard provided for differential force. For example, if one has a range of 0-300
bar, and the other has a range of 0-100 bar, the Scale and offset Wizard cannot be
used.
Two Analog Inputs On the RMC
Differential Force requires a pair of analog inputs on the RMC. The inputs must be next
to each other on the same module. On the RMC analog modules, the following input
pairs are valid:
o Input 0 and Input 1
o Input 2 and Input 3
Notice that Input 1 and Input 2 is not a valid pair of inputs.
Scaling a Differential Force Input
RMCTools offers an easy-to-use Scale and Offset wizard for differential force feedback. All
that is needed is the transducer data and the cylinder dimensions.
For more details, see Scale/Offset Wizard: Calculate Diff Force.
3.3.4.7. Input Type: Custom
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