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Frequency estimation on Mobius bearing fault simulation
RM Registered Member
Registered Member I like the SKF calculator. Excellent tool. [ more ]
Registered Member Interesting online calculator indeed. Also, interesting question. I guess your question is about observing a change in the calculated frequencies on the lower left part of the calculator when you tick or untick the box for Estimate frequencies. I've played with the calculator to reproduce what you saw. Ticking or unticking the box actually changes the values and my explanation for this is below. The way the calculator was programmed is based on two cases which are taught in the vibration... [ more ]
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Exploring Machine Learning Book
RM Registered Member
Registered Member Thanks for sharing your resource, I have purchased Andriy Burkov author book which is very useful to me with the help of this reference machine learning books . [ more ]
Registered Member Hello please see here this recommendation https://reliabilityweb.com/bookstore [ more ]
Registered Member Machine learning might be a subject that is not very much discussed here. Many people here however learn a lot about machines. Regards- Ali M. Al-Shurafa [ more ]
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Welcome to AMPBook and Article Discussions
Vibration Analysis Level 1 (or 2) Practice Question Q 45
RM Registered Member
Registered Member Jake, Thanks for the chart. I've comments that might be useful for some readers. There is a fundamental difference between the two waveforms (in Jake's post) which is physics. To explain this, let us use a third illustration. [source: https://www.researchgate.net/f...ia-18_fig1_262450664 ] Jake's upper plot is the amplitude (elevation of a point of the string) in the y-axis versus the location of points (examples are A, B, C, etc) along the length of the string on the x-axis. So here we look... [ more ]
Registered Member Dear colleagues here a Vibration poster that might be of your interest. ( no cost to download) https://reliabilityweb.com/steal-these-graphics [ more ]
Registered Member Hi, here’s a good visual of exactly how to find the period or frequency of any graph. [ more ]
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Welcome to AMPBook and Article Discussions
Batch Sugar Centrifuge Vibration problem
RM Registered Member
Registered Member We can balance only in single plane because we don't have access to other side,Those side movement might happen due to assembly error. We have successfully balanced onsite in single plane . I suggested before to check, if any assembly error might happen. Because I did not get any looseness in spectrum but 1X. [ more ]
Registered Member I have seen shop balanced rotors (but I havenever worked on a sugar screen) that had to be trim balanced when installed in the actual, on-site driven position. I am still confused about the visible movement in your video of the one, I guess your are currently working on, that has so much side movement when the brake is applied. Is this a common thing in all of these type basket designs? Appears that the mounting and driver is loosely mounted. The video does not seem to show any side movement... [ more ]
Registered Member I have balanced before centrifuges and batch sugar baskets on site. But mostly they sent for shop balancing. [ more ]
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critical speed
RM Registered Member
Registered Member It is the Speed which is equals to its natural frequency. e.g-if a pump has 1st natural frequency of 20 Hz (A natural frequency is a band of frequencies so it wont be a exact value ) then , then the 1200 cpm or anyway nearer 1200 cpm will be its critical speed and we will recommend to operate at-least +/- 20 % from the critical speed.B [ more ]
Registered Member critical speed is the speed when the natural frequency is excited by the mass residual unbalance force. at this state the mass factor and the stiffness factor are against each other in direction which cause to lower the system resistance to vibration force. any type of rotor will have one or more critical speed. so it will be like 1st critical speed 2nd critical speed and so on. [ more ]
Registered Member Dear The reason is that when an equipment is operated at critical speed resonance occurs shooting vibration amplitude. Which can lead to failure. Zaheer [ more ]
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Audit it. Improve it! Getting the most from your vibration monitoring program
RM Registered Member
Registered Member All MRO-Zone books are available with a 30-day money back - even from Amazon.com I just re-read this book - and yes, our company is the publisher, so we are huge fans of Alan's work, but I think this book and workbook is a must read for anyone managing ANY type of condition monitoring program. If you have read the book and agree - please post a review at Amazon.com to encourage Alan to keep writing and to spread the word. [ more ]
Registered Member Thanks for your interest. I am sorry, but I don't have parts of the book in a format I can share. You can purchase here though: http://www.amazon.com/Audit-Im...rogram/dp/1941872247 [ more ]
Registered Member ❤️
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Asset Management, Asset Mortality, and Sustainability
RM Registered Member
Registered Member I thought the RCM report by N&H already said so because most failures (about 80%) are random and the remaining are those failures due to uniform degradation mechanisms like wear or corrosion which are applicable to tires and light bulbs. [ more ]
Registered Member Read the article but didn't really get anything out of it. What did I miss? [ more ]
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PdM Related Magazines
RM Registered Member
Registered Member Just got my first issue (print) of Waves from Bruel & Kjaer (bksv.com/waves). Although it is more slanted to sound/noise, it includes articles on vibration as well. The articles are very interesting. [ more ]
Registered Member I seriously miss Reliability Magazine. It was worth paying for. [ more ]
Registered Member Got my October issue of "Electrical Apparatus" yesterday. Thanks for the recommendation Pete. [ more ]
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Maintenance and Reliability Books
RM Registered Member
Registered Member Asset management focusing on developing maintenance strategies and improving performance, edited by Alan Wilson, follows on from the original Asset Management book published in 1999. http://www.maintenanceonline.org/article.asp?id=6987 [ more ]
Registered Member I have been following Vee and Terry since long. Not only in this website but as well as in AMP. I would have to mention the work of Ricky Smith and Joel Leonard in the field of Maintenance & Reliability. Request Vee and other Authors to ensure that 'Indian' editions are released too so that it becomes viable for us to grab or order that copy which the whole world is going ga-ga over. Vee can appreciate this better. I am now preparing for CMRP and have somehow managed to read RCM II,... [ more ]
Registered Member Danged interesting idea.....there are so few references on the subject, and I don't know of any great flow of new information, and many of the good ones are either out of print, or will be soon....... I would be willing to put my two cents in.....some prime candidates (IMHO) are: Any of Jim Taylor's stuff - I don't think it is print any more, but there is (I think) a signficant inventory of his books stockpiled and available Art Crawford's wonderful Vol I and Vol II, which may still be... [ more ]
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Best maintenance books
RM Registered Member
Registered Member Alright ! Thank you very much. I've found a way to estimate some KPI! How can I close this post ? [ more ]
Registered Member Actually, i am also looking books that what are you looking for. D. Polmer as a good writer, but i can not find any MTBS, MTBF, and how to calculate it. Otherwise, some maintenance books did not mention and discussed it in their book [ more ]
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About EMF
RM Registered Member
Registered Member Avoid rainy days while raising your hand or holding an umbrella or your exposure limit will be instantaneous! Walt [ more ]
Registered Member Is that before or after the cell phone gives you brain cancer? That still remains a question. [ more ]
Registered Member EMF's are characterized by frequency or wavelength into one of two radioactive category : non-ionizing and ionizing.electric magnetic field is not perceptible in energy area.It affect behavior of charged objects in the vicinity of the field. [ more ]
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Suggest Book
RM Registered Member
Registered Member Thanks John [ more ]
Registered Member Review the thread at http://maintenanceforums.com/e...089011/m/71620966173 . Note that the last entry (as of this moment) mentions a book by James Taylor. This may be the book (http://www.amazon.co.uk/Vibration-Analysis-Handbook-James-Taylor/dp/0964051702) although I can't be certain of the book Bill Kilbey is referring to. [ more ]
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Vendor's Tech Notes, etc.
RM Registered Member
Registered Member PRÜFTECHNIK [url]Shaft Alignment and Vibration Guide[/url] - found this link broken - now you need to fill the form to get access Practical Guide to Shaft Alignment Technical notes: Registration is needed [ more ]
Registered Member CSI Technologies Knowledge Base Articles: Registration is needed There are also white papers here: Choose brand and document category [ more ]
Registered Member Brüel & Kjær Technical Reviews Accel Handbook (Russian) [ more ]
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Machinery Malfunction Diagnosis and Correction seminar
RM Registered Member
Registered Member This 4-day seminar will again be offered starting on 22 July 2013 and running through 25 July 2013. It will be held at the Hilton Garden Inn on Padre Island Drive in Corpus Christi Texas. The area is a popular vacation spot and while you attend the seminar during the day the family can enjoy Padre Island and Mustang Island. The seminar uses the book Machinery Malfunction Diagnosis and Correction as a foundation document, and includes many additional topics to stay up to date with this... [ more ]
Registered Member John, if consideration to have a session in Malaysia will be materialized, i will wait for that one. [ more ]
Registered Member Valve, you still have time to sign up for the course and get a copy on CD and 4-1/2 days of facetime with Bob Eisenmann all for about the same price. [ more ]
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100 Years in Maintenance & Reliability by V. Narayan, JW Wardhaugh and MC Das
RM Registered Member
Registered Member I have read Vees book and its recommended reading for the students on Robert Gordon Unversity's MSc in Asset Integrity and Management. As Terry as highlighted its one of the few easy reading books where you can pick it and read a chapter that delivers a case study. One I liked was how pump reliability went from 10 months to 40+ months and the tactics that were used. There is also another interesting chapter on achieving a reliability culture among the workforce. [ more ]
Registered Member Vinay, Any news on your market research? I am in in India (Pune) now, so if you are coming over during the holidays, let me know. [ more ]
Registered Member Vinay, Either system will do; thank you for the effort. I will be in Pune, india in the Dec/Jan period. Are you likely to be there in that period? [ more ]
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Welcome to AMPBook and Article Discussions
Beware of Technology Slavery?
RM Registered Member
Registered Member Quote: I have long been concerned with the dangers invoked by Kaczynski, so I hope there will be journalists with the guts and independence to review this book -- it provides a perfect framework for analyzing the uncontained Gulf disaster and subsequent reform efforts, attempts to regulate the financial/market system, political paralysis on global warming and nuclear proliferation, panics about obesity and mental illness epidemics, and it is highly relevant to a recent sudden burst of `who... [ more ]
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Welcome to AMPBook and Article Discussions
Victor Wowk
RM Registered Member
Registered Member Jeremy, use the following contact information and email or call him. John from PA Machine Dynamics Inc. www.machinedyn.com 1021 Commercial Drive SE Rio Rancho, NM 87124 PO Box 66479 Albuquerque, NM 87193-6479 (505) 884-9005 Email victor@machinedyn.com [ more ]
Registered Member Wowk mentions another book in his "Machinery Vibration: Measurement and Analysis" titled "Machinery Vibration: Corrective Methods". I have not been able to find this book and a small search only returns the "Balancing" book. Does anyone have this book or know where to purchase this book? [ more ]
Registered Member Thanks, my copy did not have the radius multiplier either. Have corrected it. Now when I get to using this formula it won't throw me off balance.... rgds [ more ]
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