Grinding Intervals and Nep Level Management

First grinding after 80,000–150,000 kg; subsequent grindings every 80,000–120,000 kg for both cylinder and flats. The doffer should be ground only half as often (except for man-made fibres: more often but lighter). Licker-in clothing should not be ground but renewed after 100,000–200,000 kg. The best interval is selected based on the mill's nep limit, as each grinding reduces neps but the lower nep limit increases noticeably from one cycle to the next.