This new device helps the tissue manufacturer to monitor the development of the creping doctor vibrations during the blade life, thus allowing the blades change to be correctly programmed. This in turn significantly reduces the risk of chattering on the YD surface and better control of the coating distribution. The system consists of an accelerometer mounted on the nose of the doctor back at drive side (Figure 2 – Figure 3) and then connected by cable to a control unit. Signal is then carried via an ethernet or a USB cable to a regular personal computer. Unlike other similar systems, BONVIBES uses only one sensor to detect the vibration data from the creping system. Field tests have shown that the differences in measurement with two or three sensors are negligible. Having only one sensor in the working area guarantees more freedom of maneuver to the operators of the machine.
The display of the BONVIBES on the PC has two graphs and a numbering on the top left, all in continuous reading. The graph at the top (Figure 1) represents the amplitude of the vibration while the graph at the bottom shows the variation in time of the acceleration value that appears as a numerical value at the top left. The four windows at the top right of the display show the instantaneous measurement of the low, medium, maximum and overall frequency. In summary the system:
- Helps tissue manufacturers to monitor the development of vibrations to the creping system;
- Allows the correct management of the blade life;
- Provides valuable support to avoid chattering on the Yankee dryer.