TY - JOUR ID - 130780 TI - Maximum number of parts that can be accurately counted using a weighing scale JO - Journal of Applied Research on Industrial Engineering JA - JARIE LA - en SN - 2538-5100 AU - Extrand, Chuck AU - Hoskin, Janet AU - Eeg, Martin AD - Protolabs AD - Protolabs 5540 Pioneer Creek Drive Maple Plain, MN 55359, USA. Y1 - 2021 PY - 2021 VL - 8 IS - 3 SP - 195 EP - 208 KW - counting errors KW - weight counting KW - scale counting KW - balance counting DO - 10.22105/jarie.2021.271437.1248 N2 - Many factors may influence the accuracy of part count by weight, but one of the most ubiquitous and often overlooked causes is part variability. In this work, experiments were performed to quantify the weight variation of injection molded parts and to measure the maximum number of those parts that could be accurately counted by weight. A model and working equations that account for tolerances of both the mold cavity and plastic were derived to estimate how part variability affects the weight counting of a single set of parts. Within experimental uncertainty, the model gave estimates that agreed with the actual part counts. UR - https://www.journal-aprie.com/article_130780.html L1 - https://www.journal-aprie.com/article_130780_1cb77349015656a77c327bb2392a5b0c.pdf ER -