| 摘要 |
<p>The invention relates to a method for the operation control of motor-driven valves (6) for controlling liquid flows, especially for monitoring dilution water valves, such as they are used in fiber material web production machines, the drive (7) of the valve comprising a stepper drive (17) and the erroneous counting of the steps caused by a malfunction of the valve being used to determine a friction coefficient for the valve.</p> |
