The main maintenance points for self-adhesive label printing machines include the transmission part. Check the tightness and usage of the transmission belt, and adjust its tension; check the status of each transmission part and each kinematic pair such as gears, chains, cams, worm gears, worms, pins, keys and other solid parts; check the working performance of the clutch and replace it in time Worn brake pads; check each joystick to ensure there are no abnormalities; the rotary labeling machine must ensure the accuracy of the transmission gear, and the intermittent labeling machine must ensure the accuracy of the one-way traction roller. In the printing part, check the tightness of each fastener; check the plate cylinder, impression cylinder, bearings and gears and their wear and tear. The gears and chains between the impression cylinder and the impression platform must be in good meshing state, so as to ensure Correct pressure closing, pressure separation and printing registration; check the working condition of the overprint detection device and deviation correction device; check the condition of the printing plate clamping mechanism; check the constant temperature control mechanism of the impression cylinder; the impression cylinder and the impression platform should be cleaned frequently Xian, keep it flat and smooth. In the ink transfer part, check the ink transfer working condition of the ink fountain roller, ink stringing roller and inking roller (or anilox roller) as well as the working condition of gears, worm gears, worms and other components (check the working condition of the scraper blade and the reciprocating moving mechanism of the scraper blade) ). ?