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SCAIME Manual : NU-eNod4B-ETH-E-236708-D.docx
In
weight feeder
mode, when
PID activation
option is activated,
eNod4
will adjust the flow of extraction function to maintain
constant flowrate regarding the flowrate set point. The measured flowrate is compared to the set point flow rate and the on-
board PID controller makes necessary corrections to the belt speed or materials feed.
The configuration of this plan of regulation can be made in a totally automatic way.
We can stop and restart PID at any dosing cycle step. If we stop PID, the extraction command value is fixed to nominal.
So that this plan of regulation works, it is necessary to realize weight calibration indication and flow rate calibration
beforehand.
11.2.2
Weight section length (mm)
Effective weight section length is defined as length units in
millimeters (mm).
The effective weight section length
corresponds with half of the distance between the belt rollers which are found before and after the roller with the belt scale.
The effective weight section length is calculated as follows:
11.2.3
Conveyor inclination (degrees)
“Belt tilt angle” (angle of conveyor in degrees) allows correcting the effect of inclination on the weight. If the belt is mounted
horizontally, the definition is 0. The belt can be tilted to a maximum of 35°.
Always ensure that the definition corresponds with the current tilt angle, otherwise the belt load is incorrectly calculated.
