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CR4 - Recent Forum Threads and Blog Entries

Recent content from CR4, The Engineer's Place for News and Discussion

Published: Tue, 23 May 2017 04:50:57 EST

Copyright: Copyright 2017

earthing problem

Tue, 23 May 2017 04:50:57 EST

we have 120 kva ups in company, when we started it then our neutral to earth voltage getting vary. our neutral to earth voltage is o.6 or less then 1V in company, after UPS on its invertor section startup then suddenly neutral to earth voltage comes across 1.9 or 2 V. As we discussed with UPS compan

What is This Round Nut Called?

Mon, 22 May 2017 18:05:00 EST

I can't find the name or source of the round nut shown below. It is used in the door assembly of an equipment enclosure. The door assembly has a bar with a slot in it. As the door is opened the nut slides down the smaller diameter part of the arm's slot. When the door is fully opened the larger shou

Subaru Idle Air Control Valve

Mon, 22 May 2017 14:51:04 EST

Greetings! I have a '95 Subaru SVX with a 3.0L, 6 cyl. Boxer engine, AWD, that I bought some years ago as a beater car for my daughter. A nifty little car if I could get it to run right. The engine lacks all power on acceleration and will not idle without dying. It is throwing up (OBD1) codes for M

Autonomous Cargo Ships

Mon, 22 May 2017 11:34:36 EST

I came across this article and thought I'd pass it along. Pretty amazing how quickly autonomous everything seems to be approaching... The world's first self-sailing electric cargo ship will be built by Norway Norway plans to launch the first autonomous and fully electric cargo ship next year that

I Need Help

Mon, 22 May 2017 02:41:39 EST

I Knew I should Of listened more in school! This formula Has been giving me fits.I Recently Got into the Business Of sublimation Printing on T-Shirts Ceramic Tiles,Mugs And ect!But The issue seems to be the Coating of the items before they can Be sublimated..I Have The Formula But I am Not Sure wh

Help: Can this Transformer Handle a 50 AMP Outlet?

Sun, 21 May 2017 23:51:18 EST

Disclaimer: I'm not an electrician. I have an electrician who is doing a job for me and his mother in law passed away and he asked me to find out about this transformer. I have spent hours in the web trying to figure it out. What I need is an 50 amp outlet. Here's what I have access to: <a href

Bed Material

Sun, 21 May 2017 18:57:06 EST

Dear Sir, Is there any easy way to fill Bed Material inside the AFBC boiler furnace? (Time saving)

Fault Locating Feature with SEL Distance Protection Relays

Sun, 21 May 2017 12:14:18 EST

I have tried to set/configure the fault locator embedded in distance relays type SEL 421...with little or no success, much as the parameters used for configuring the locator appear straight forward. The fault locators always point farther than actual fault location. In the latest incident, the actu

I Need to Understand Some Installation Terms

Sun, 21 May 2017 09:02:01 EST

Can anyone please explain to me the main cables and sub main cables.I searched in google and I get a lot of wierd answers

Ms Excel

Sun, 21 May 2017 08:57:18 EST

Please can anyone give me the formular for PPF and TAX in Ms Excel cause I cant find it anywhere

Woman of the Week – Jane Goodall

Mon, 22 May 2017 20:30:00 EST

Jane Goodall is considered to be the world’s most knowledgeable chimpanzee expert, after spending over 50 years studying their social and family interactions. She has worked extensively on animal and general welfare issues. As a child, she was given a lifelike chimpanzee stuffed animal named

Is the Internet Stalking Us?

Mon, 22 May 2017 19:30:00 EST

Since you’re reading this blog post, I think it’s fair to assume you are an internet user, meaning that you’ve likely come across personalized internet ads or “online behavioral advertising” (OBA). It turns out these tactics may be doing marketers more harm than good.

Crowdfunding Campaign Aims to Restore Round-the-World Jeep, Send It to Finish the Trip

Mon, 22 May 2017 13:00:00 EST

Just a mile or so. Despite driving 56,000 miles down two continents and up two others in the same Jeep, a single ferry trip negated Loren Upton’s dream of driving the entire route over land. Nearly 30 years later, Upton’s family has started raising funds to restore that Jeep and send him

Troxler's Fading: An Early Optical Illusion

Mon, 22 May 2017 04:00:00 EST

This blog has occasionally focused on optical illusions and impossible constructs—here’s Part 1 and Part 2 of the impossible object series. This post will take a look at one of the earliest documented cognitive optical illusions, Troxler’s fading. Ignaz Paul Vital Troxler (1780-18

Bio Engineering’s Stunning Glimpse Into the Future

Sun, 21 May 2017 04:00:00 EST

Browsing through various scientific and engineering websites like provides a stunning glimpse into the future of bioengineering. A robot that prints tissue and an artificial heart that beats are just some of the latest success stories of physicians and engineers working together in the bioe

What's DARPA up to in 2017?

Sun, 21 May 2017 04:00:00 EST

The Defense Advanced Research Projects Agency (DARPA) projects that it will make great strides in 2017. From biotech, to vertical take offs and landings, the year will be packed with technology moving through various stages from concept to fruition. ------- Editor's Note: This news brief was bro

Call Your Mother!

Sat, 20 May 2017 04:00:00 EST

Since cell phone use has become widespread, it has changed much of how we conduct our personal relationships. We connect with our friends and family more easily than in the past via social media apps and texting, we even conduct our romantic lives with the device—using dating apps or sending i

Tips for Preventing Preventable Hearing Loss

Sat, 20 May 2017 04:00:00 EST

Hearing loss caused by prolonged exposure to music or a noisy work environment can be gradual with the first signs being missed background noises (a squeaking door, the ticking of a clock) to affected conversations. ------- Editor's Note: This news brief was brought to you by the Medical Equipme

Caption This for 5/19/2017

Fri, 19 May 2017 20:45:00 EST

This week's image: Thanks to Brave Sir Robin for the submission. Be sure to vote on your favorite caption!

ABM Drives: Custom, Continuous-duty Motors and Drives

Fri, 19 May 2017 04:00:00 EST

The design and manufacture of drives for almost every application is facilitated by ABM Drives’ comprehensive standard continuous-duty motors and drive product platform and flexible modular systems. A modular design process allows for cost-effective, low-volume production runs. ------- Edi