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Alex

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Hello,

has anybody tried some alternative methods for cardan alignment instead of classic laser alignment?
I am thinking about 4 point distance measurement with laser and manual calculation having some precise board attached on one side.
The second option that comes to my mind is dealing with magnetic brackets for pulley alignment.

Any good results, experience, suggestions?
Dave Reynolds

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https://www.pattersonpumps.com/assets/pdf/FM%20Patterson%20Driveshaft%20IOM.pdf

Even though this is for a fire pump, it is an alternative method to align a drive shaft

Dave
Alex

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Thanks Dave. I find this method somehow too basic and have some thoughts if it is possible to measure those distances accurately enough. In the meantime I was thinking about a reverse dial indicator method that would consider two cardan joints as two couplings. I could measure static side joint as a coupling, get H and V angles. Thereafter I would check the movable side joint and correct the motor position in a way that H&V angles would be the same for both cardan joints.
fburgos

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never had to align cardan shaft... lucky me [rofl]


I only know of pruftechnik optaling capable of measuring the angle directly from driver to driven machine, wonder how its normally done with laser
OLi

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You dismount the cardan and mount a expensive straight "cardan adapter alignment plate(s), fixture" so you get the laser heads looking direct at each other at the center of one shaft and on the plate on the other compensating for any static offset and then you run a standard alignment procedure but only rotating the heads on the fixtures so if it is a huge cardan at a rolling mill it is a real pain..... Hardly ever any one spend the money on doing that part from initial assembly, maybe. As you know the goal is to make sure the shafts are parallell and in angle so the only thing the cardan sees is the offset it is made to take care of.
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Vibe-Rater

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Reply with quote  #6 
As far as I know - and I have never done one - special brackets are needed to describe what Oli said. rgds
John from PA

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Reply with quote  #7 
Quote:
Originally Posted by fburgos
never had to align cardan shaft... lucky me [rofl]


I only know of pruftechnik optaling capable of measuring the angle directly from driver to driven machine, wonder how its normally done with laser


See https://www.efficientplantmag.com/2011/05/cardan-shaft-alignment/.
Dan Timberlake

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Reply with quote  #8 
A face measurement with a dial indicator at each end lacks the visual sizzle of lasers, but if the distance between joints is long 1990s vintage lasers were pretty much out of their element.

Walt Strong

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Reply with quote  #9 
Nice video Dan, but it is not a Cardan shaft!

Walt
John from PA

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Reply with quote  #10 
Quote:
Originally Posted by Walt Strong
Nice video Dan, but it is not a Cardan shaft!

Walt


Dan needs to look at my link in response #7.
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