GE FGB-M05 manual Dispensing, Dispense is correct, Dispense not correct too little

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Rev. May 2001

GraviMaster-FGB-M05 (S)

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Gravimetric Blender

 

2.7.6Dispensing

Dispensing of the different components will start after the calculation of the related weights. The components are dispensed in the order as defined in the recipe (gravimetric only). In volumetric mode all components are dispensed at the same time.

Every mechanical valve has a reaction time. The controller uses the ‘Hardware Reaction Time’ to calculate the time which the dispense valve must be activated. The ‘Hardware Reaction Time’ is the maximum active time of the valve when no material is dispensed. The controller uses a pulse of 5ms in the following algorithm:

OpenTime = Weight [g] / dipenseSpeed [g/s]

OpenPulses = (OpenTime [s] / 0.005 [s]) + HardwareReactionTime [Puls]

After every dispense cycle the weight is measured. The weight bin must be stable before the weight can be measured, therefore a time delay is inserted between dispense and measuring. When the controller starts measuring the signal must be stable for at least 1 sec. (signal within the ‘Weighbin-variationband’)

After measuring the weight of the first dispense some calculations can be done, and with the results parameters can be changed. Result is a more accurate next dispense. After the first dispense of a material one of the following situation occurs:

Dispense is correct

The difference between calculated- and measured weight is less then the dispense accuracy. In this case extra dispense tries of this material are not necessary.

Dispense not correct (too little)

The difference between calculated- and measured weight is more than the dispense accuracy but there is less dispensed (measured) than calculated. In this case the controller reacts according to the chosen ‘alarm-type’. The following ‘alarm-types’ are possible:

IGNORE No extra dispense-tries. Relations within the recipe will corrected by re-calculations.

WARNING The controller tries to reach the dispense-accuracy by extra dispenses. The extra dispenses are limited by the parameter ‘dispenseTry’. When after a maximum number of dispense tries, the accuracy is not reached the controller sends a warning only to the user (= The controller continues with the next material).

ERROR The reaction of the controller is equal to ‘WARNING’ only an error is sent to the user when the accuracy is not reached. Now the controller waits for a confirmation (enter) to initiate new dispense tries of the same material. This process goes on until the dispense accuracy is reached.

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Contents Manual Serial No ISO 08.01.02.064.GB 986731 Rev. MayIntroduction Controls Installation Introduction Gravimetric Feeding Features are Options areInactive Blender start-upBlender status StandbyStop requested ErrorPause Machine-modeProduction-modes Weight-AlarmWeight-Error ContinueGravimetric VolumetricDispense modes CombinationExample Recipe to weight calculationMethod Standard TotalMethod Percentage Adding extra materialsRegrind control Additive to regrindAdditive to Regrind Empty regrind ControlStock Silo Control Dispense not correct too little DispensingDispense is correct Condition 2. The mixerchamber may not be full Dispense not correct too muchCondition 1. The mixbin-vale may not be open if present CalculationsDatalogging EQ-Net Certificate ISO Certificat Operator-interface Keyboard Function KEY in MACHINE-MODEKey Description Number input field User controlButton Text input field0OPERATING Auto Status Operating Mode AutomaticChange components Example Add a new component ActionsWhite Natural Regrind Additive ?WHITE? NaturalWhite Natural ? White ?ADDITIVE ?2 Add/change recipes Example Add a new recipe Field of a RecipeOption Menu in EDIT-RECIPE Step ‘edit recipes’ Enter StandardPercentage Additive WhiteChange current recipe Timely information Production screenMaterial usage screen Crates YellowCalibration of the weigh bin Adjustment of the gravimetric blenderInput & Output monitor Tare of the weighbinOverview of parameters Standard adjustmentHardware-reactiontime Public parametersGravimetric Parameter Description InitContinue PulseProtected parameters Protected Parameters Reports and overviews Change entrycodeMenu hierarchy Change date and timeRevision code of the system System ProductionController Services MountingRev. May GraviMaster-FGB-M05 S Gravimetric Blender Alarms Alarm reports and solutions Alarm-message Description Action to cancel alarm Rev. May GraviMaster-FGB-M05 S Gravimetric Blender Status Operating Maintenance Adjusting sensor sensitivityTransportation of the GraviMaster Replacement of parts Replacement of printed circuitCleaning the machine User-interface specifications Safety measuresGeneral machine specifications Valves specificationsEin Electrical diagrams Rev. May GraviMaster-FGB-M05 S Gravimetric Blender Rev. May GraviMaster-FGB-M05 S Gravimetric Blender

FGB-M05 specifications

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