Bobbin weight¶
Reference — Calculation: net and gross weight of a wound bobbin
Purpose¶
This calculation provides the net and gross weight of a wound bobbin from fineness, ply count and winding length. The gross weight (including the bobbin body) is useful, for example, for transport, warehouse logistics or a weighing check at goods receipt.
Inputs¶
| Field | Unit | Meaning |
|---|---|---|
| Material: | – | Optional selection of a material from the master data. Automatically takes over the stored fineness. |
| Fineness: | tex, dtex, den, Nr_metric, Nr_english | Fineness of the material with unit selection next to it. Must correspond to at least 1 tex. |
| Ply count: | pcs | Number of single threads wound together (at least 1, initial value 1). |
| Length on bobbin: | m | Material length wound on the bobbin. Must be greater than 0. |
| Empty bobbin weight: | g | Optional weight of the empty bobbin (tube/drum without material), up to one decimal place. If the field remains empty or at 0, only the net weight is output. |
Mandatory fields
Length on bobbin and fineness must be greater than 0 (fineness at least 1 tex), ply count at least 1. If one of these values is missing, the result fields remain empty.
Result¶
| Value | Unit | Meaning |
|---|---|---|
| Net material weight: | kg | Main result: pure material weight without bobbin body, to three decimal places. |
| Gross weight (with bobbin): | kg | Total weight of the wound bobbin including bobbin body, to three decimal places. |
Operation¶
The common structure of all calculation pages (input card, result tiles, Calculate/Clear buttons, history) is described in How calculation pages are structured — here only the special features of this page.
The Empty bobbin weight is optional: if you leave it empty or at 0, the gross weight equals the net weight.
Calculation¶
The exact calculation formula is not part of this documentation.