Rev. May 2001

GraviMaster-FGB-M05 (S)

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Gravimetric Blender

 

2.6Dispense modes

The blender has two ways of dispensing: gravimetric and volumetric. One mode can be selected or a combination of both. This can be defined choosing menu (F1) ‘controller / public parameters’.

Gravimetric

All component of the batch are dispensed and measured separately. Gravimetric is more accurate than volumetric, but takes more production time, ie., lower output.

Volumetric

All components of the batch are dispensed at the same time using the dispense time of each component (calculated by the system). The components are dumped directly in the mixer chamber. No measurement is done in this mode. Therefore this method is less accurate, but the production time is faster, ie., maximum output

Combination

When combination is defined, one gravimetric will be followed by a defined number of volumetric dispenses. This is defined by the parameter combinationRatio. This parameter can only be defined if ‘combination’ is chosen. This mode has the best of gravimetric and volumetric.

Use: normally the defined combination will be done (ex. 1:3). However, if the mixer chamber is full, the process will automatically do a gravimetric dispense instead of a (possible) volumetric one.

2.7Batch handling

2.7.1Production control

If a start command is given the controller will check if the blender actually can start. If a hopper has a low-indication (optional) the controller will alarm.

Also the parameters are checked. These can be in conflict with the recipe to be executed. The following items will be checked (if applicable):

*Empty Regrind control

-The controlled hopper must contain regrind (according to recipe)

*Stock silo control (optional)

-Controlled hopper must contain regrind (according to recipe)

*Additive to regrind

-Controlled hopper must contain additive (according to recipe)

The blender will not start unless all conditions are met. A message will be sent to the user interface.

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GE FGB-M05 manual Dispense modes, Gravimetric, Volumetric, Combination, Batch handling Production control

FGB-M05 specifications

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