The use of a precise scale in pick-by-weight order picking helps to count large quantities and ensures the quality of the picking process. The integration of different scales is integrated in the LUCA-Server possible without any problems. A static scale directly in the picking process ensures 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 picking compartment and the quantity is signalled. The withdrawal is acknowledged on the display. The number of pieces in the picking compartment starts flashing and the tare of the scale is set to zero. The employee places the parts on the scale. The "remaining number of pieces" is shown on the scale display. If the quantity is correct, the scale display shows "0" and the LED turns green. The possible remaining quantity can be put back into the visible storage compartment and acknowledged. The process is not very fast, but guarantees a very high quality.
If necessary, a weight calibration of the articles can be carried out at any time. We can provide you with the details in a personal conversation.
Weighing and counting, but correctly
The most important criterion for using scales in the picking or shipping process at all is the stability of the weights of individual items. For items where the weight cannot be determined precisely, it is not possible to use a Pick-by-Weightmethod. If the articles are stable in weight, the question then arises as to when it is best to weigh. Unfortunately there is no simple answer to this question. Many factors must be taken into account in this matter.
Catalogue of questions for finding solutions:
- Are the weights of all articles comparable or do they differ very much from each other?
- 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?
- Can be adapted to any trolley
To answer these and other questions, we can support you in workshops.
Avoid frequent planning errors
It is often claimed that a checkweigher directly from the fault location 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 is within the weight tolerances of the heavy articles, which makes a correct weight check impossible. For this reason, the checkweigher is best used 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 considered. However, the result is not satisfactory, because then almost every shipment will be faulty.