Drum slippage generally occur sporadically and for short bursts of time which can remain unseen while affecting roll structure and quality until further deterioration occurs. This would translate in variations this can be detection at first instance to take limit production loss
Detection
Among the 450 KPIs calculated on every production cycle approx. every 10 min., the drum speed diterental stability during acceleration KPI enables us to detect drum
In this specific case, severe drum speed differential instabilities were intermittently occurring for few seconds during the acceleration period
The SPN continuous and automated data analysis system alerted the mill and triggered our experts’ attention.
Our Intervention
Our specialists validated that this behavior was not related to a change in the winding parameters, but likely caused by dirt on the front drum surface following a recent set
throw incident, reducing its traction on the rolls.
A report was sent to the mill with specific recommendation to verify the front drum roughness and clean if necessary.
Benefits
The prompt detection and reporting enabled the mill to avoid producing rolls with loose tightness near core affecting the roll performance at the printing press during the flying splice operation.
Without the SPN continuous analysis service, this issue could have gone undetected resulting in significant losses due to defective products and deterioration of client satisfaction.