When operating on yarn machines, the breaking of one (or more) yarn has to be detected immediately and automatically. Yarn sensors play this part. To avoid a “wild” rewinding which could be cause of perturbations on neighbouring sites, even of breaking of the machine, it is recommended to mount CA9-TE onto the machines. First they cut off the broken yarns, second they grip them.
On winding machines, the yarn has to be cut when the bobbin is full. CA9-TE series have to be manually reloaded.