Étude de cas

Étude de cas

Les études de cas suivantes démontrent la valeur de notre solution à nos clients.

Hidden roll defect due to faulty valve connector

Rider roll load variations affect wound-in tension which can affect roll quality and resulting in poor performance in downstream processes. Detecting such anomalies can be challenging as they are intermittent in nature and their impact does not always translate into visual defects on the produced rolls..... Read more >

Incorrect selection of winding parameters

Winders run different grades, each requiring a specific set of winding parameters (torque, nip , tension), to produce rolls with optimal structure and free from defects...... Read more >

Bad roll quality due to a seized bearing

Abnormal deviation in tension due to defective tension control is likely to go undetected at the mill as the variations in the wound-in tension are often only detected when rolls are consumed at the press.... Read more >

Detecting a Sheared Motor Shaft

While the center press motor shaft had sheared, the machine kept operating with no signs or alarms alerting the mil of this issue. See how we  detected this which would have otherwise resulted in tremendous production losses. Read more >

Capturing Intermittent Abnormal Drive SCR Firing

Whether dealing with legacy or modern digital drives, there is always a risk of abnormal SCR firing which can be difficult to troubleshoot without high speed data (2,500 samples/sec), otherwise leading to frequent interrupted production. Read more >

Uncovering Defective Rider Roll Load Cell

Shifts in load cell calibrations or defective load cells can be tricky to detect in closed loop systems, since the control is continuously aligning the load cell feedback signal on the reference. Monitoring independent transducers signals can achieve this. Read more >

Detecting an Abnormal Motor Field Current Level

Motor field current level is one of these things which which is rarely monitored and while it affects available motor torque, it is a motor failure waiting to happen.  Read more >

Tracking Drum Slippage

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.…  Read more >

Slipping Motor Tach Coupling

A defective motor speed feedback  will not always show obvious signs in the absence of a continuous high speed data analysis based on machine specific algorithms.... Read more >

Intermittent Malfunction of Hydraulic Valve

Sporadic and intermittent valve anomalies make them almost impossible to detect in the absence of a high resolution data acquisition and automated continuous analysis of pressure stability.... Read more >

Troubleshooting Run Togethers

There are many things that can cause the wound rolls to run together at the winder. Troubleshooting is much easier if we have verified the controls are operating properly.... Read more >

"En résolvant la majorité de nos problèmes de production à travers leur service de soutien à distance, SPN Consultants a réussi à réduire considérablement notre temps d’arrêt et nos coûts d’entretien. Pour les problèmes qui nécessitent une attention particulière, les experts de SPN sont toujours disponibles pour régler les problèmes"
Marc Levasseur
VP Opérations
"Grâce au service de surveillance et à l’expertise de SPN, nous avons réussi à réduire nos pertes pour papier rejeté ; ces pertes s’élevaient à environ $220,000 pour les 12 derniers mois. La surveillance en continu par SPN nous avertit de tout problème potentiel qui pourrait affecter la qualité de nos rouleaux."
Jean-François Poirier
Superviseur
"SPN nous envoie des rapports d’état quotidiens. Cette information nous permet de demeurer à l’affut du rendement de notre bobineuse, de préserver l’uniformité d’une série à l’autre, de réduire les temps d’arrêt et de diagnostiquer rapidement les problèmes de production qui peuvent survenir."
Robert DeJong
Surintendant E/I
"Avec le défi que représente le vieillissement de l’équipement, les services de SPN nous procurent un portrait constant et fiable nous permettant d’entretenir efficacement les machines à papier, les bobineuses et les sécheuses, d’identifier les maillons faibles et de prévenir les problèmes cruciaux avant même qu’ils ne surviennent."
Nathan Gallant
Ingénieur de la fiabilité