Kalrez LS390 has been purpose-designed to overcome these common challenges by providing high hardness properties (Shore A3 88), low stiction
, temperature resistance up to 220-degC and outstanding chemical resistance to process chemicals, WFI (water for injection), and SIP and/or CIP processes.
Moreover, accurate models that allow the identification and quantification of stiction
are critical for their compensation by means of a model-based control strategy.
* Predict the valve positions by correcting the valve commands using empirically obtained stiction
and dead band data.
System identification applied to stiction
quantification in industrial control loops: a comparative study, Journal of Process Control 46: 11-23.
As a result, the torsional stiffness [K.sub.[theta]], preload friction torque [T.sub.f], stiction
transition velocity v and maximum stiction
deformation e are the key modeling parameters.
[T.sub.INT] - clutch shearing torque (in stiction
(5.) Bhushan, B, "Adhesion and Stiction
: Mechanisms, Measurement Techniques, and Methods for REDUCTION." J.
A critical point drying process is used to avoid stiction
between the parts due to capillary forces (Fig.
Adhesion and stretching were also affected by feature size, with deeper features exhibiting greater stiction
and stretching (ref.
Molders, designers, and OEMs are keenly aware of how stick-slip phenomena, or "stiction
," can affect the performance of devices such as auto-injectors, injection pens, stop cocks, and safety syringes.
Also at that time, we were mostly concerned with particulate contamination--and indeed cleanroom standards are based on this--but for disk drive manufacturing, other contaminants, particularly organics and ionics, are of major concern and have to be eliminated to prevent corrosion and stiction
, the term used to describe when the head sticks to the disk after a period of not being used.
"Instead of counting on Teflon and Formica to provide just the right balance of stiction
and friction," he explains, "I decided to start with bearings that move as freely as possible, and then increase the friction in a controlled manner."