方向稳定性（漂移）是由进给机构的不规则性造成的，作为一个单独的机器功能，不使用缝纫线。该方法适用于电动家用缝纫机，但也可能适用于手动或脚踏式缝纫机。除定义、原理、缝纫机的准备、产品、结果表达和试验报告外，还包括一个附录，其中规定了材料和设备。

The directional stability (drift) is caused by irregularities of the feed mechanism as an individual machine funktion, without using a sewing thread. The method is applicable to motor-operated household sewing machines, but it may also be possible to apply it to hand- or treadle-operated machines. Includes additionally to definitions, principle, preparation of the sewing machine, prodcedure, expression of results and test report an annex which specifies material and apparatus.