Yarn sensor (quality control): MDL-B

MAIN FUNCTION: To produce bobbins of the same length (repeatability better than 0.5 %).

PRINCIPLE: The yarn length is calculated from the speed of the yarn. The electrical charge variations are measured by a capacitive probe. This signal is analysed and computed through a microcomputer located in each sensor.

When the bobbins are achieved, each MDL-B sensor gives order to cut the yarn or to stop the position.

Each spindle, each window or each machine side can be monitored separately. The average speed range should be from 200 up to 1400 m/mn.

The IS (interface supervisor) is linked to each sensor. It has been designed to get compatibility with most of the machines found on the market. The user has just to input the length, then starting time can be obtained through starting machine or through running of the yarn.

At each time and when all the positions are completed, one can read on the IS the bobbin lengths, the average speeds of each position, the cycle times and the standard deviation. When a yarn breaks during the cycle on one (or several) position(s), the position has just to started again.

Repeatability of the MDL set: The repeatability of a MDL-B sensor is the ability to reproduce identical lengths on x bobbins with a maximum length deviation of 0,5% between the x winded bobbins.

ELECTRICAL PROTECTION: MDL-B protection against reversed polarity and high level overload on output. MDL shows a very high level of electromagnetic compatibility: >4 kV.

Find out the technical datasheet(format PDF)...