Indexing refers to the movement of bottles or other containers into and out of the fill area of a filling machine. Using one of several methods, the indexing system will move one bottle under each fill head on the machine.
Once the bottles are in position, they will be held there until the fill is complete. The bottles will then be released to move along the power conveyor to the next packaging machine.
Proper indexing, be it through pins, a star wheel, a screw or some other method, is crucial to the efficient and reliable performance of an automatic filling machine. Without proper indexing, a packager can expect inconsistent fills, bottle jams, spills and other unwanted occurrences. Luckily almost all automatic liquid fillers include settings in the PLC and operator interface to make finding the correct indexing settings simple.