Checkweigher Systems

A typical checkweighing system is made up of:

• An infeed section (how the product is transferred to the checkweigher)
• A weighing section with weighing / load cell
• An outfeed section with sorting / rejecting device for products that don't meet pre-set specifications
• User interface for inputting specifications and checking results
• A solid and vibration minimizing frame - these can be built to stand up to a variety of environmental factors
  

There are many different checkweigher designs in common use. The components used to construct a checkweigher will vary in detail depending on how they are used. The characteristics of the items being weighed and their surrounding environment are also have a strong impact on the design.

The main differences between static and dynamic checkweighers are:

1. Static checkweighers measure the weight of products that stand still. Dynamic checkweighers weigh products in motion, on a checkweighing conveyor.
2. Static checkweighers are used for manual weighing of products or for sample spot-checking. Dynamic checkweighers automatically check 100% of the products produced.
3. Static checkweighing is a labor-intensive process. It requires manual product weighing, recording of the result and then product removal for the next weighing procedure. Dynamic checkweighing is entirely automatic. Products are weighed as they pass along a conveyor on a production line, with off-weight products rejected from the production line by automated removal devices such as pneumatic pusher arms or air-jets.

Static Checkweighers

• Bench scales, used for manual weight control and portioning of products or for sample-spot checking
• Designed to allow a fast and accurate weighing and portioning process
• Available in numerous variations and sizes for ergonomic working procedures
• Allow integration into data management systems for data tracking and analysis
• Fast and convenient label printing

Dynamic Checkweighers

• Weigh products in motion (i.e., checkweighers with conveyors)
• Automatically check the weight of 100% of the products
• Performing sample tests for net weight and tare weight reports that satisfy Weights & Measures compliance requirements and Weights & Measures package tare weight verification reports
  

Both static and dynamic checkweighers are to be found in most production environments, with static checkweighers commonly determining target weights for dynamic checkweighers.

The choice of type of checkweighing system used on a production line is usually determined by application requirements and processes.

Industrial checkweighers have long been a key element of production operations, as they are capable of far more than just weighing, and can actually optimize your entire production process. Benefits of implementing an industrial checkweighing solution:

• Avoid costly fines with 100% weight inspection
• Keep fillers operating in synchronization
• Save on wasted materials, allowing for the production of more products, leading to higher profits
• Improve production processes and equipment efficiency
• Save labor and personnel costs
• Reduce false rejects and rework
  
• Maintain the identity of your brand
  

In addition, an industrial checkweigher can effectively improve your overall equipment efficiency (OEE) and thus reduce your total cost of ownership (TCO).