Semiconductor

Below you will find white papers on topics involving process control and automation.
Submitted by Oriental Motor
on Mon, 03/18/2019

Ideally, stepper motors should operate smoothly without vibration throughout all speed ranges. In reality, they run with some vibration at low, mid, or high speeds, causing unwanted noise. This type of vibration is called "rotation vibration" and developing the suppression system for the rotation vibration is a major challenge.

Submitted by Parker Electromechanical
on Wed, 02/06/2019

Mechanical rotary power given from a motor must be driven by an appropriate amount of electrical power provided by the drive. Rotary power is provided for by the electrical input power and the rotary power cannot exceed the electrical. Therefore, it is important to verify the power throughout the system from power supply all the way to the motor or gearbox output shaft.

Submitted by Tom Trinh || Valin Corporation
on Wed, 06/06/2018

In this white paper, Valin's motion control & automation senior application engineer, Tom Trinh,  will explain the different applications utilizing machine controllers and their requirements.

Submitted by Watlow
on Mon, 03/26/2018

The use of INPUT/OUTPUT software filters can provide enhanced performance of controllers to process systems conditions. The use of Input filters are to reduce the erratic fluctuations of the analog input signal due to either electrical “noise” conditions or rapid fluctuations of the analog input signal. It accomplishes this by slowing down the response of the analog input to a change.

Submitted by Watlow
on Mon, 03/26/2018

Occasionally questions come up with regard to calibration of Watlow controllers. This paper will attempt to address some of the more common questions on this subject. Many people want to jump in right away and begin performing a calibration procedure before verification. Before you would attempt to calibrate a Watlow controller, verify that the controller is in need of calibration. If you verify that readings of the controller first, you may not have to go through the more involved process of changing the calibration settings.

Submitted by Watlow
on Mon, 03/26/2018

Customers who wish to control three phase heaters require power controllers. How do you decide which method of control to select? ‘Two-leg versus three-leg control’ and ‘zero cross versus phase-angle control need to be considered.’ The following will help you decide when each method is appropriate.

Submitted by Watlow
on Mon, 03/26/2018

In Watlow catalogs, brochures and web pages there is a category of controllers listed as “Limits and Alarms”. It is not always clear to everyone when to use these controllers or which type of controller to use. This document is an attempt to clear up some of these issues.

Submitted by Watlow
on Mon, 03/26/2018

In today’s world, there is an ever increasing awareness and focus on safety. A system designer needs to understand all aspects of design that can affect the safety and reliability of the system they are implementing.

Submitted by Parker Process Control Team
on Wed, 02/14/2018

Graham Johnson, EMEA Product Manager for Parker Veriflo Ultra High Purity Fluoropolymer Valves, looks at the benefits of two point seal valves for semiconductor applications. The corrosive nature of high concentration acids and bases, clear chemistries and slurries used in semiconductor applications mean that pneumatic valves specified for these applications need to be particularly robust.

Submitted by Fit-LINE
on Thu, 06/18/2015

Operational efficiency is a critical factor in the fluid processing industry. The synergy of fitting components and assembly technology to achieve this objective is the focus of Fit-LINE, Inc. Applying extensive polymer technology and injection molding expertise, the company has analyzed the design, tooling and manufacturing processes required to create high-performance solutions for demanding high-purity fluid processing applications. Through extensive R&D, testing and evaluation, Fit-LINE has isolated three variables that need to be addressed to ensure leak-free fitting assemblies.

Submitted by Tim Tritch
on Mon, 02/02/2015

The purpose of a filter is to remove contaminants from a fluid stream either completely, or at least down to a given rating or specification. Filters are used to help control contaminants and are rated according to their ability to remove these contaminants from a liquid, gas or air stream. There are different methods in which the performance of filters are specified.