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Technopark Automation & Control has supplied numerous filling machines and batch weighing systems that are used in Gold Refineries and in the Jewellery trade for the precise weighing of Pure Gold in grain and powder form. Due to the high intrinsic value of the product, it is required to weigh the product to high accuracies i.e. down to 3 decimal positions of a gram!
In order to achieve this it is required to consider the materials handling properties of the product and means to feed the product so that these high levels of repeatability and accuracy are achieved. Force balanced transducers has to be used instead of load cells. These devices are capable of resolutions of up to 1 part in 100 000 where normal strain gauge load cells will only achieve up to 1 part in 4000. The control systems used on these filling machines are also fitted with sophisticated algorithms to ensure that every amount weighed off meets the accuracy required.
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