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Keith, It was a turn the knob affair.. Best Regards.

If only the vendor would have worked with us when we brought them the printouts from this forum.. it wouldn't have taken 8 months!! Thanks again..

I just wanted to follow up on the thread237-151895 that was started last May by yours truly. The issue was FINALLY resolved in December of 06, thanks to the help of a great elevator consulting company who forced our vendor to try something that was suggested for months. The noise is now gone...

Finally, I've got an onsite visit from the vendor supervisor tomorrow. I will be sure an share all of your input. Vendor still denies there is a problem..

Vendor will not help.. says we need to go through licensed elevator company.. the same one who thinks there is no problem..

Keith, Update, Drive was changed to Flux Vector. Noise is still there, loud as ever. Our maint. has not done anything to move this forward. A large punch list was sent to this vendor in Mid April w/ a 30 day time frame, it included this issue. Next step, litigation. Other issues on site here...

Just an update.. looks like the drive was set to Flux Vector sometime this week. Noise is still there. I did notice something however on the display screen. It seems like the noise is corresponding to a value called Torq Ref.- It hovered around 8%, but when then when the noise got really loud...

I had our building manager ask our elevator techs (who were working on another issue) if the drive/controller was running in open loop vector. The modernization supervisor said "he didn't know", their "troubleshooter" told him, it is running in "AC Mode"... Does "AC Mode" correspond to any...

Also saw this in the drive technical guide.. A. d 3 - 0 1 : Prohibited Frequency 1 Factory setting (each): 0 . 0 d 3 - 0 2 : Prohibited Frequency 2 Range (each): 0.0 to 400.0 Hz d 3 - 0 3 : Prohibited Frequency 3 These parameters allow programming of up to three prohibited frequency points for...

From notes I found on site.. C5-01- ASR Proportional Gain 1 --- 20 C5-02- ASR Integral Time 1 --- .200 sec (Factory setting is .500) C5-03- ASR Proportional Gain 2 --- 20 C5-04- ASR Integral Time 2 --- .500 sec C5-06- ASR Primary Delay Time --- .004sec C5-07- ASR Switching Frequency --- 0...

Keith, good idea. Any drive wizards out there care to have me list parameters? afr/asr settings etc? let me know what you need and Ill have my consultant write them down.

Keith.. Thanks for the review. so what do you think? Should I still chase down the drive pulsation? The second file is the best one, with the AC motor noise filtered out, it's obvious the droning happens the whole run except for accell/decell.

Sorry about the bad links folks.. file factory copied the wrong URL's.. Here are the new good links.. The site will make you wait a few seconds and then you click "Don't want a premium download? Click here to access our free download links" You'll again have to wait a few seconds after...

Keith.. Great idea.. Here it is. file a- no filter recording http://www.filefactory.com/25650e file b- bandpass filter (center freq @ about 300hz cutoff 2 octave up and down) http://www.filefactory.com/7477c8 Screen Capture of Wav File w/ Sound. Note: you'll need the following Camtasia...

Also w/o the bandpass filter applied.. there is a major peak at around 22Hz as well. http://onfinite.com/libraries/852426/b42.jpg

Kontiki, I did a spectrum analysis of the sound and it looks like the loudest peak is between 330-340Hz with another large peak at around 220Hz or so. This is with the bandpass filter applied. I've posted the screenshot here. http://onfinite.com/libraries/852424/73c.jpg The motor is rated at...

Mark and everyone else, Thank you SO much for all of your insight. This is great info to pass to our consultant. As I think back to when the hoist was originally installed and look bag at my logs... there were some "problems" with the controller/drive and the tech had to re-program a number of...

I think it's got to be mechanical.. AC Motor Area, no droning, just AC motor noise. Brake area, no droning.. Area where worm contacts ring gear.. bingo. Going down to the end of the hoist @ the bellhousing, little to no droning. The loudest section where the droning/humming is coming from the...

jraef- There is an encoder on the end of the imperial ac motor and it is hooked to the controller/drive.

jraef- Open Loop Vector.