Difference between revisions of "Gross Weighers"

[[Gross Weighers]] are a type of weighting machines that weigh the Product in the bag. Note that most  electronic weighing in the bag will tare the empty bag off and  technically be a nett weigher.  

==Compared to [Net Weighers]==

Low headroom. Discounting the  height of the top surge hopper, a gross weigher and feeder can take up  less than 2 metres of height (including the conveyor). Lower cost.No weigh hopper is used and therefore less ancillaries / metal parts are required, reducing the cost. Slower than nett weighers. The  next weighing cycle cannot start until a fresh bag is fitted into the  clamps. Generally the speeds that can be achieved are up to 8 cycles per  minute with good accuracy, depending on the material. For an  application where accuracy is of less importance, higher speeds can be  achieved, of up to 12 cycles per minute (may involve fast feed only). Slightly less accurate. The  operator can fit the bag at an angle, which will affect the inflight  amount. The inflight amount of material is higher due to a longer drop  between the feeder outlet and the bag. It is easy for the operator to  tamper with the weigher parts during filling, which will affect cut-off  and the subsequent inflight adjustment for the next weighing cycle. Can be in a mobile format more easily than nett weighers.