APRIL 7--ISRA Vision Systems (Norcross, GA; www.isravision.com) has provided three Advanced Surface Inspector systems to two paper suppliers. The systems have superior resolution of defect images at paper machine speeds in excess of 4800 ft/min. The Advanced Surface Inspector was selected by these suppliers due to its 60-MHz processing speed--reportedly 50% faster than competitive systems.
Defect images enable accurate classification for root-cause analysis resulting in reduced defects from the paper machine and reduced sheet breaks at the coater and/or super calendar. The source of defects is quickly identified and eliminated. By accurately determining the types of defects within the reel, reels can be optimally segregated for rereeling. In addition, specific defects that will cause sheet breaks can be identified for removal at the rereeler. The combination of accurate classification of defects with the Advanced Surface Inspector System and the Rewind Manager results in the automatic control of the rereeler to stop on preselected defects. This system increases machine uptime and improves throughput.
The system provides three times the number of pixels for each defect image over competitive systems, according to the company. The advantage to the user is more accurate classification of defects--for example, round holes do not appear flat. The user can classify and mark defects that will cause the web to break. The white LED illumination module allows for optimum red and brown spot detection.
