Vibration device purchase
Vibration device purchase
(OP)
Hello everyone,
I'm looking for a vibration analyser an a balancer to run some spindles up. I'd also like to use the vibration analyser for onsite troubleshooting. Can you tell me what would be the best price/performance device to buy? I know that there are some accelorometers that ouput directly a 4-20 mA analogic signal, is there a card that I can hook up to the sensor and then to the computer which will have a fft analyser sofware?
Thanks for your help,
I'm looking for a vibration analyser an a balancer to run some spindles up. I'd also like to use the vibration analyser for onsite troubleshooting. Can you tell me what would be the best price/performance device to buy? I know that there are some accelorometers that ouput directly a 4-20 mA analogic signal, is there a card that I can hook up to the sensor and then to the computer which will have a fft analyser sofware?
Thanks for your help,





RE: Vibration device purchase
If you can afford it get a 2 channel system, you'll find it is a lot more use for troubleshooting. Down the track you'll also want to reanalyse stuff on your PC so make sure it has some communications option, or else use a laptop as your data acquisition device. You'll also appreciate having a separate channel for the trigger.
I've used various balancing systems over the years, they all work (well, so does a scope and a pencil and paper), and to be honest there isn't much in it for ease of use.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Vibration device purchase
An accelerometer with 4-20 ma output is not intended for spectrum analysis. Perhaps you are thinking of ICP (constant current powered) accelerometers that provide an acceleration signal (AC voltage typically 100 mv/g) suitable for analysis. There are a lot of analyzer choices ranging in cost and hassle including:
Borrow
Rent
Lease
Buy Used
Buy Cheap
Buy Quality
Buy Components and assemble PC system yourself
Walt
w_f_strong {at} msn [dot] com
RE: Vibration device purchase
The Schenck is much better for us, or get good very fast laptop A/D card and very expensive accelerometers and write own routine...
RE: Vibration device purchase
BK
RE: Vibration device purchase
Sheesh
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Vibration device purchase
I looked for the VB-1000B. It seems that this device only works for balancing. I saw the VB-1000V which is a vibration analyser. Both components would cost 8000$ (VB-1000V) and 5000$ (VB-1000B)for a total of 13000 USD. I find that a little bit too expensive. Are those devices worth their price? I saw the LORD banlance Check from TEVA which is a combo as the Balance pac 1200 from Reliability direct. Did someone already used one of those ?
GregLocock
Now that you have the specs, would you give me some suggestions on what I should buy ?
Thanks everyone for your reply, it's helping a lot.
RE: Vibration device purchase
What grade balance are you aiming at? What level of vibration to you currently see?
You should only need to buy one instrument.
The vb1000v is a vibration spectrum analyser that looks as though it is designed for condition monitoring of bearings, it cannot (easily) be used for balancing.
http://commtest.com/index.cfm/vb1000v
Looks like a nice piece of gear, but not, I think, what you want.
The 1000b is a dedicated balancer, this has the positive aspect that it is designed for the purpose, and the negative that it isn't much use for anything else (according to the brochure). However, it can display spectra,that may get you somewhere with your troubleshooting task.
I'd spend a little more and get a general purpose two channel analyser with a balancing program and transfer functions myself. Is that the sort of troubleshooting you were thinking of, or would just spectra do?
I have not used any of the above, I am just going by the brochures. It is along time since I have used any of this gear, so I don't think I should make specific recommendations.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Vibration device purchase
RE: Vibration device purchase
h
For low cost balancing:
http:/
For a 4-20mA output vibration sensor that also includes the raw dynamic output for FFT, see the CMCP420VT:
http:/
There are various PC based DAQ cards that may work for you. www.iotech.com comes to mind.