Load Cell Choice for dynamic checkweigher system

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Discussion Overview

The discussion revolves around the challenges of selecting an appropriate load cell for a dynamic checkweigher system in a chicken slaughterhouse. The focus is on the automation of weighing and sorting using PLC and load cells, particularly under high-speed conditions.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Experimental/applied

Main Points Raised

  • Zeshan describes the current setup involving a conventional S-type load cell and digital indicator, noting that it fails to provide accurate weight measurements due to the rapid passage of chickens.
  • Some participants suggest searching for "check weigher" as a potential solution, referencing Wikipedia for various methods.
  • One participant expresses concern that the weighing platform's mass may be too heavy, potentially affecting the system's response time.
  • Zeshan indicates difficulty in finding a specific load cell suitable for the system despite searching for checkweigher assemblies.
  • A participant inquires about the resolution of Zeshan's problem, seeking updates on any solutions found.

Areas of Agreement / Disagreement

The discussion reflects multiple competing views regarding the appropriate load cell choice and the impact of the weighing platform's mass. There is no consensus on a specific solution or load cell model.

Contextual Notes

Participants have not resolved the issue of load cell selection, and there are unresolved questions regarding the specific requirements for speed and accuracy in the weighing system.

Muhammad Zeshan
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Hello everyone, Greetings of the day.
My name is Zeshan, I am automation engineer, I am stuck in problem of automation of weighing and sort system in chicken slaughter house using plc and load cell. Everything is done right but load cell is not giving me the right weight to make the right decisions. I have a "moving line of hanging chickens" running at 8000 chicks/hr, the platform where the load cell is connected that has a length of 11.5cm and the time for one chicken to pass over that plat form is 350ms. now the problem is that the conventional s.type load cell and digital indicator combination which i am using is not fast enough to determine the exact weight of chicken in this short time. the min capacity of load cell should be 30kg(plat form assembly + 2kg chicken)
So please suggest me which type of load cell and indicator i should use to match the speed of the system.
 
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This problem has been solved by industry. A good search term is "check weigher". Wikipedia has a good entry here:
https://en.wikipedia.org/wiki/Check_weigher
It gives various suggestions for methods.

I also think your weighing platform is much too heavy compared to what you are measuring and that combined mass is slowing the response of your measuring system.
 
Bandit127 said:
This problem has been solved by industry. A good search term is "check weigher". Wikipedia has a good entry here:
https://en.wikipedia.org/wiki/Check_weigher
It gives various suggestions for methods.

I also think your weighing platform is much too heavy compared to what you are measuring and that combined mass is slowing the response of your measuring system.
Thanks for your response, I have searched with "check weigher" term but all platforms throw me with different company made checkweigher assemblies like CAS and others but I can't find a specific load cell which I can use in my system..
 
Dear Muhammad
did you solve your problem ?
can you tell us how ?
Yorgos
 

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