In This Issue:
Using Clutches for Superior Center Winding Tension Control
Product Spotlight: Micro Rotary Union
Using Clutches for Superior Center Winding Tension Control
Excerpt: ” … Clutches are not often chosen to control tension on center winders because their proper application and the advantages of using a clutch with a motor are usually not understood.
Usually, when one finds a clutch-controlled center winder, the clutch is “geared in” to run 50 RPM faster than line speed at core. The clutch is usually driven by a constant RPM AC motor, and therein lays the crux of the problem.
As the diameter of the roll increases, the torque at the clutch must be increased proportionately to maintain a constant tension profile in the web. As the torque and roll diameter increase, the slip speed of the clutch also increases as a result of diameter increase … ”
Product Spotlight: Micro Rotary Union
Micro Rotary Union
The Montalvo Micro Rotary Union (MRU) is a mechanical rotating device that allows the transfer of air to and from rotating equipment. It is used in machinery that requires a constant air flow during rotation and can operate at speeds of up to 7000 RPM with a maximum air pressure of 75 psi.
The small size is ideal for use in applications with limited space. The MRU uses micro precision instrument bearings and a carbon seal. The shaft is made of rugged stainless steel.
Visit the MRU product page for more detailed information, datasheets, drawings, and more.