Thank you for this video. I watched about 8 really bad videos on this sirometer, and you are the only only to explain what I was to be looking for from the spring when the correct rpm I was looking was reached. Thank you again.
Thanks for reminder on the Briggs. Haven't used mine for some years (on garden equipment) and thought it was broken/ indeed of maintenance/ oiling. Nope, it was me that was indeed of oiling, so thanks for that!
I have the most experience with the Sirometer. However it does require developing a skill. But when you get it, you get it. It's cheap, and very accurate. Once you've dialed in the correct vibration. The wire will appear orbital.
Just found one of the resonant reed style ones in an abandoned industrial building on our facilities property that was scheduled for demo, glad i scooped it up before it got crushed, the one i found is the same brand as the one you show in the video however the indication is in RPM, it reads up to 75 x 100 rpm
The German design wire vibration analyzer is worth its weight in gold,, I use my extensively working in a small engine repair,, many time a customer will talk about a high vibration,, it cannot be easily diagnosed because of the moving parts,, I used it Many Times doing tune ups on engines on vehicles,, a little tricky at first,,, playing with them,,, when and where and how too place them,, had a customer one time complain about a vibration at 40 to 45 miles an hour (Truck) then it seemed to smooth it self out,, by process of elimination, attaching a water hose clamp to a Driveline,, rotating it every 1/2 of an inch we discovered she had a bent Driveline,, then she told me she replace her U-joints several times, I told her that was pertinent information that could save me a lot of time.🤤
Hi John, great stuff! If you have a tire with two high spots at 90 degrees apart, would this cause a second order vibration or two first order vibrations at a different phasing?
the mechanical fourier transform is so cool 😝 I’m trying to do some measurements on a car flywheel and I’ve built a piezoelectric sensor and I wired a tachometer to send bot signals to an portable oscilloscope. The oscilloscope works pretty well with 2 channel input. This one was like $600 but there are even cheaper ones available. Btw it has a FT function but it’s kind of slow. Your mechanial analog one seems to give you pretty crisp readings 👍 even the syometer is ingenious:)
Hi Professor Kelly, I try to find the relation in between dBg that are the scale for a Toyota NVH tool, compared to mg that e.g. Pico uses? Are you able to provide any information on that? Thanks in advance! Br. Sjakan
Thanks for your reply, I also never have seen this in reference on Vibration, but if you Google Toyota NVH training, you find a pdf doc. That states this on page 110. Direct link to the pdf is here. www.testroete.com/car/Toyota/mr2%20spyder/References/Technical%20Training/04%20-%20Noise,%20Vibration%20and%20Harness/04.pdf Br. Sjakan
sjakan123 here is a link to the ISO standard for dBg. It is used to measure sound pressure levels for frequencies lower than 20 Hz. www.iso.org/standard/13813.html
WeberAuto, what I found regarding the statement dBg. The scaling is also available in the Pico tool, when measuring vibration above the Infra Spectrum. Quote: Amplitude - The quantity used to express the level or magnitude of a vibration. When expressed in dBg (Decibels g) it relates closely to what the customer feels. Br.Sjakan
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
I still have a lot of respect for the reed tachometer! John, I always love your videos! Thank you!!!
Thanks Bill!
Thank you for this video. I watched about 8 really bad videos on this sirometer, and you are the only only to explain what I was to be looking for from the spring when the correct rpm I was looking was reached. Thank you again.
Thanks for reminder on the Briggs. Haven't used mine for some years (on garden equipment) and thought it was broken/ indeed of maintenance/ oiling. Nope, it was me that was indeed of oiling, so thanks for that!
Thanks for watching
I have the most experience with the Sirometer. However it does require developing a skill. But when you get it, you get it. It's cheap, and very accurate. Once you've dialed in the correct vibration. The wire will appear orbital.
Just found one of the resonant reed style ones in an abandoned industrial building on our facilities property that was scheduled for demo, glad i scooped it up before it got crushed, the one i found is the same brand as the one you show in the video however the indication is in RPM, it reads up to 75 x 100 rpm
Very cool find!
The German design wire vibration analyzer is worth its weight in gold,, I use my extensively working in a small engine repair,, many time a customer will talk about a high vibration,, it cannot be easily diagnosed because of the moving parts,, I used it Many Times doing tune ups on engines on vehicles,, a little tricky at first,,, playing with them,,, when and where and how too place them,, had a customer one time complain about a vibration at 40 to 45 miles an hour (Truck) then it seemed to smooth it self out,, by process of elimination, attaching a water hose clamp to a Driveline,, rotating it every 1/2 of an inch we discovered she had a bent Driveline,, then she told me she replace her U-joints several times, I told her that was pertinent information that could save me a lot of time.🤤
Awesome, thank you!
You do such a great job sir. So informative. Thanks. Who makes the reed tachometer?
Thank you for your instructing video! I really appreciate it!
Thank you!
Thank you very much for this video, very informative.
Thank you!
It's an interesting topic!
Thank you teacher!
Daniel Sinico Thank you!
As always really grt demonstration,.. thank u sir
aditya singh Thank you!
Extremely helpful, thank you very much!
Thank you
Hi John, great stuff!
If you have a tire with two high spots at 90 degrees apart, would this cause a second order vibration or two first order vibrations at a different phasing?
Thank you! It would be a second order tire speed related vibration
Thanks for the great info.
Paul C Townsend Thank you!
thank you for this...
The "Briggs" thing is 15:50 mins in.
Cool tool
the mechanical fourier transform is so cool 😝
I’m trying to do some measurements on a car flywheel and I’ve built a piezoelectric sensor and I wired a tachometer to send bot signals to an portable oscilloscope. The oscilloscope works pretty well with 2 channel input. This one was like $600 but there are even cheaper ones available. Btw it has a FT function but it’s kind of slow. Your mechanial analog one seems to give you pretty crisp readings 👍 even the syometer is ingenious:)
Hi Professor Kelly, I try to find the relation in between dBg that are the scale for a Toyota NVH tool, compared to mg that e.g. Pico uses? Are you able to provide any information on that? Thanks in advance! Br. Sjakan
The dBg is for sound through the microphone attachment. There is no conversion to mg (milli-Force of gravity).
Thanks for your reply, I also never have seen this in reference on Vibration, but if you Google Toyota NVH training, you find a pdf doc. That states this on page 110. Direct link to the pdf is here. www.testroete.com/car/Toyota/mr2%20spyder/References/Technical%20Training/04%20-%20Noise,%20Vibration%20and%20Harness/04.pdf Br. Sjakan
sjakan123 here is a link to the ISO standard for dBg. It is used to measure sound pressure levels for frequencies lower than 20 Hz. www.iso.org/standard/13813.html
WeberAuto, what I found regarding the statement dBg. The scaling is also available in the Pico tool, when measuring vibration above the Infra Spectrum.
Quote:
Amplitude - The quantity used to express the level or magnitude of a vibration. When expressed
in dBg (Decibels g) it relates closely to what the customer feels.
Br.Sjakan
I miss an answer on this statement, Thanks in advance.