roller waste;roller wrapping;roller lap;lap-ups

Bad state of the roving top-roller will create movement of the nip of roller and toproller, and make the delivery yarn periodicity uneven and even worsen evenness.

粗纱皮辊状态不良，造成罗拉、皮辊钳口移位，使输出纱条产生周期性不匀，恶化条 干。