Pick by Weight

The use of a precise scale in Pick-by-Weight order picking helps to count large quantities and ensures the quality of the order picking. The integration of different scales is LUCA-Server possible without any problems. A static scale directly in the picking process ensures the quality much better than a weight check in the final inspection.

The weighing process and calibration

With the help of different picking systems e.g. Pick-to-Light the removal tray and the number of pieces are signalled. The removal is confirmed on the display. The number of pieces on the picking tray starts to flash and the tare of the scale is set to zero. The employee places the pieces on the scale. The scale display shows the "piece count left". If the piece count is correct, the scale display shows "0" and the LED turns green. The possible remaining piece count can be put back into the looking storage compartment and acknowledged. The process is not very fast, but guarantees a very high quality.

If required, a weight calibration of the articles can be carried out at any time. We will be happy to provide you with the details in a personal meeting.

Weighing and counting, but correctly

The most important criterion for using scales at all in the picking or shipping process is the stability of the weights of individual items. For items where the weight cannot be determined precisely, the use of a Pick-by-Weight method is not possible. If the items are weight stable, the question then becomes when is the best time to weigh. Unfortunately, there is no simple answer to this question. There are many factors that need to be taken into account when dealing with this issue.

Questionnaire for finding a solution:

  • Are the weights of all articles comparable or do they differ greatly?
  • How large are the weight deviations in the tolerances of the individual articles?
  • What quantities are picked?
  • What performance must the process deliver?
  • How can the workplaces be designed?
  • Adaptation to any trolley possible

We can help you answer these and other questions in workshops.

Avoid common planning errors

It is often claimed that a checkweigher directly from the point of failure on the conveyor system is sufficient for quality assurance of the consignments. Unfortunately, this is rarely true. Without tare detection at the beginning of the conveyor line, correct net detection is hardly possible. With cardboard boxes, even the humidity plays a very important role. Sometimes the weight of the lightest article lies within the weight tolerances of the heavy articles, which makes correct weight checking impossible. For this reason, it is best to use the checkweigher directly in the picking process and not at the end.

When calculating the total tolerance, at least half of the lightest article should always be taken into account. However, the result is not satisfactory, because then almost every shipment becomes faulty.