压脚压力不合适 面线穿错了,导致夹线器调很紧、底线调到最松也还是不行。 重新正规穿线,但偶尔也会有轻微的底线“勾线”
|小黑屋|手机论坛|Archiver|缝纫客,工业缝纫机维修问答
GMT+8, 2025-6-17 01:37 , Processed in 0.035645 second(s), 13 queries , File On.
Powered by Discuz! X3.3
© 2001-2017 Comsenz Inc.