SEQUENCE OF OPERATION
The filling sequence starts with a START input from the operator via push button on the controller. The controller automatically tares the gross weight to obtain a Net weight of zero. The material is then fed into the weigh hopper, a two-position sector gate controls the rate at which it is fed. The controller compares the actual weight with the target weight settings, when the Main/Coarse feed setting is reached the main feeder of the sector gate is latched, feeding continues in the Fine/Dribble feed mode. The material is fed in the fine feed mode until the Final Weight minus In-Flight value is reached, after which the Fine feeder is closed. Once the feeding is stopped a settling time (adjustable time, varies from 500ms to 2 sec) is given after which the end of batch is signaled, automatically the Totalizer and Bag Counter is updated.
The bag is clamped to the bag holder by a pneumatically operated clamping arrangement. Only if the bag is clamped the material is discharged into the bag from the weigh hopper. Once the material in the weigh hopper is completely discharged, the bag is de-clamped and the next cycle automatically starts. |
