Friday, March 2, 2012

Stories for 2012-03-01


 This Week's Challenge Question 
The Case of the Big Spark: Newsletter Challenge (March 2012)
posted in Challenge Questions

This month's challenge question: The space between the plates of a capacitor is filled with a dielectric (insulator) to increase the capacitance. (Dielectrics can be air, paper, ceramic, glass, etc.) If a capacitor is charged and the dielectric is removed before it is completely discharged, a sp ... more

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Solidworks Certification...How Good Is It?
By bett4haze in Education

I am a mechanical engineering college student with three internship experiences. The official solidworks website offers a CSWA (Certified SolidWorks Associate) for $100. (http://www.solidworks.com/sw/support/796_ENU_HTML.htm?pid=446) I intend to take the exam and obtain the certificate in order to ... more

Tilt Position Indicator Sender Unit (Marine Outboard)
By mi3gto in Electrical Engineering

Folks I am looking to make a tilt and trim unit based on the CMC PT-130 which has a sender unit inside that sends the angle position of the unit back to a gauge on the dash. I am in the UK and am looking to source a sender that does this. Any ideas as to what sensor is needed to do the same job as t ... more

Need Information About Rubber and Plastic
By Byron Jay in Chemical & Material Science

I am working on a new invention the product will remain under water for its lifetime. Can someone help. I need to know what kind of flexible plastic or rubber material will not deteriorate when left submerged in ordinary tap water for many years?

Secondary CT Leads
By iochoa in Electrical Engineering

Usually, for a Power Transformer, the secondary ct terminal is a box near the ct bushing then a cable is laid to the ct junction box located in the transformer, as well. What can happen if we avoid the ct terminal box, i mean, making the secondary CT lead of sufficient length to terminate directly i ...more

How to Reduce a Fan Motor Speed
By herbie in Electrical Engineering

Hi all, Need some help. I have a room stand ventilator (220 v 250w), real nice and industrial looking, but hell it does blow. Even on the lowest setting it blows too hard. I thought of putting a dimmer switch to reduce the power even more. Can one do that or will it lead to problems like the motor ... more

Masking Nickel Plate
By Nigh in Manufacturing

I am looking at a part we need to make in thin molybdenum sheet. We want to braze this part to some metallised ceramics which we can do if we apply a nickel flash to the surface. My problem is that there will be an area in the centre which will have a series of fine slots, like a venetian blind, th ... more

How to Get the Right Number of Turns in an Undervoltage Coil?
By lknight22 in Electrical Engineering

Hi, I was asked to rewind a 110 volts dc undervoltage coil for a 600AT breaker. I found out that there is a two kind of wire (series connected). The first is #41 AWG with approximately 6000 turns and the second is #32 AWG with 1500 turns (I counted them myself). To illustrate further there is three ... more

About Servo Motors
By loyd in Electrical Engineering

Dear engineers, In one of our plastic bag making machine we have baumuller made (type: DSO 71M 7.9 kw 3000 rpm) servo motor, which shaft was broken inside the motor near to driving end bearing. If we remove this armature for welding the shaft, can we able to re-fix its incremental encoder correctly ...more

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Adrift On the Sea of Social Silence
posted in Left2MyOwnDevices

In 1971′s A Clockwork Orange, a patient is conditioned through aversion therapy, subjected to violent imagery and nausea-inducing drugs in the hopes of reforming criminals. In 1974′s The Parallax View, a subject is subjected to brainwashing beginning with sensory deprivation foll ... more

Honolulu, 1945
posted in Hemmings Motor News Blog

This video, which Richard Sullivan's father shot on V-J Day on Kalakaua Avenue in Waikiki, has been around the Internet a few times by now, but it still makes for an excellent carspotting exercise. What do you see here? Watch the Video

Gearboxes and Gearheads: A Lesson for All
posted in How to Select Industrial Products

They are the living dead of the mechanical world. A miracle of science, allows these androids to continue an existence beyond the world of flesh and bone. Their blood is 5W-30, and their organs are metal toothed disks. THEY ARE THE GEARHEADS! ...via Artinaart on Photobucket They know no sleep, ...more

So, Do You Want To Improve Your Manufacturing Process(s)?
posted in GEA's Global HVAC Technology Blog

Many small and medium sized companies want or need to change the way they manufacture due to increase production capacity, increase profitability and/or increase market share. This realization requires the start of a journey that begins with the development of a roadmap to outlines how to get ... more

Caption This for 03/02/12
posted in Caption This!

This week's image: Be sure to vote for your favorite caption!

 Latest Topics of Discussion^ Back To Top
Selection of Value of X-Capacitors that are Used in Differential Mode Filters
By iamakda in Engineering Projects

Dear All, I have a question regarding the selection of value of X-Capacitors that are used in Differential Mode Filters (EMI Filters). I have an Isolated Full Bridge DC DC Boost Converter of 3KW for which I have do design a input Differential Mode Filter. The inductor just after the dc source ha ... more

The #1 Idea to Make Electric Cars Viable (My Opinion)
By ElGuapo in Automotive

I've talked to friends about this a while ago but thought I would post up the only way electric vehicles will be successful. This is NOT my idea, I did come up with it on my own however after googling it I found Renault has attempted it and there is "talking" going on about it. Electric cars need a ... more

Traffic Safety
By snatr in Automotive

I thought I'd post at least two of these three topics here because of this being an engineering forum. The first two of these things are ideas I'd like to see happen. And the third is a recommendation I have. See what you people think. Maybe someone can pull the right strings. * Note: I live in the ... more

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