Machine Train Shaft Alignment-To Move or Not to Move

Blog posts   •   Jun 17, 2016 06:36 GMT

It is always the question with machine train shaft alignments: what needs to be moved? The best way to approach a multiple machine set shaft alignment project is to know where everything is and where everything needs to be.

This particular auxiliary generator set has 10 pieces of rotating equipment to align. An induction motor in the middle with five pieces going to the north and four pieces going to the south, all rotating at 1800 rpm

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This assessment is tackled by measuring the alignment condition from the induction motor to the first piece north. After this is measured, then the remaining pieces going north will be measured by using the Machine Train program. With the Fixturlaser XA Pro, we can make the machine template with machine names and dimensions and store it in the XA’s memory before the shaft alignment conditions are assessed. When the alignment assessment is needed, just recall the saved fie from memory and measure the rotational centerlines from machine to machine.

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The Results

The induction motor to delivery bridle top generator alignment is clearly within the 1800 rpm tolerances of 0.7 mils/inch angularity and 4.0 mils offset.

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As for the remaining pieces of equipment, the results again meet the correct shaft alignment tolerances.

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VibrAlign Machine Train Shaft Alignment-8

Best Fit coupling Values

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Best Fit Foot Values

Now the south generator set needs to be assessed. Remember the induction motor has a shaft that connects to both the north and south stands. After measuring across four couplings, the results are a bit more interesting. The XA Pro has a default “Best Fit” solution that is displayed after the measurements are completed. There are two machines out of alignment (designated by orange values), both Stand 1 and Stand 2 Front Screw Down Generators. The best fit solution has the Stand 2 Front Screw Down Generator with the least amount of correction (shimming less than 90 mils). Let’s not forget that the induction motor is also coupled with the north generator set and that is completely within tolerance. If the induction motor is moved, the north generator set will be out of alignment. The best solution (not necessarily the ‘best fit’) is to select the induction motor by touching the lock over the induction motor and now the assessment can be done to see if there is enough movement both vertically and horizontally to meet the alignment specifications.

As seen in the report below, if the induction motor is now the “fixed” machine, the vertical and horizontal values are recalculated to show the corrections needed in this scenario. The farther away from the fixed machine, the more the correction. The horizontal adjustment will be easily met with a correction at the back foot of Stand 2 Rear Screw Down Generator (far right) of 114 mils. The vertical correction could be more dubious; but, there were over 500 mils of shims at both of the Stand 2 Front and Rear Generators and over 300 mils of shims for both of the Stand 1 Front and Rear Generators.

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In conclusion, a machine train alignment can be completed with much less frustration if the proper tools are utilized. It is always better to see where you are before you start moving equipment around–plan your work then work your plan.

By Brian Shanovich

By Brian Shanovich It is always the question with machine train shaft alignments: what needs to be moved? The best way to approach a multiple machine set shaft alignment project is to know where everything is and where everything needs to be.

Read more »

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News   •   Jun 16, 2016 12:26 GMT

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Elos Fixturlaser AB changes its name to ACOEM AB

Press Releases   •   Sep 17, 2014 14:53 GMT

In June 2014, the ACOEM Group, France, acquired Elos Fixturlaser AB, the world leading developer and manufacturer of laser based alignment systems.

As of September 15, 2014, Elos Fixturlaser AB changes its company name to ACOEM AB. Please note that this is only a name change. The company’s corporate identification number, addresses, as well as all company contact information remain unchanged.

"With the ACOEM Group, we have found a new owner within the same industrial segment as us. Although Fixturlaser at large will remain unchanged, the name change to ACOEM AB will clearly show that we today are a part of the ACOEM Group", says Hans Svensson, CEO of ACOEM AB.

The ACOEM Group, seated in Lyon, France, is a global player within maintenance and reliability with brand names such as 01dB, OneProd, and Metravib. The change of ownership and name will not affect the distribution of Fixturlaser products. Fabien Condemine, CEO of ACOEM Group says: "ACOEM will continue to support the existing distributors of Fixturlaser's product range to ensure a continued growth of the market. We are convinced that the benefit of the strong Fixturlaser distribution network will help the ACOEM Group to reach its goals.”

For further information, please contact: Hans Svensson, CEO ACOEM AB, tel: +46 31 706 28 00, e-mail:

For editorial inquiries, please contact: Anchi Jonasson, Marketing Communications Officer, tel: +46 31 706 28 67, e-mail:

Fixturlaser is a global player and a leader in developing innovative, user-friendly equipment for shaft alignment. By helping industry worldwide to become perfectly aligned, and eliminating anything that might not be, we minimize unnecessary wear and production stoppages. This will ultimately make our customers more profitable and our environment more sustainable.


As of September 15, 2014, Elos Fixturlaser AB changes its company name to ACOEM AB. Please note that this is only a name change. The company’s corporate identification number, addresses, as well as all company contact information remain unchanged.

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Contacts 3 contacts

  • Press Contact
  • CEO
  • +46 31 706 28 00

  • Press Contact
  • Area manager
  • Responsible for the Nordic markets
  • 031-7062808

  • Press Contact
  • Marketing Communication
  • +46 31 702 225690


Welcome to our world of shaft alignment

Since the very beginning in 1984, ACOEM AB (former Fixturlaser AB) has helped industry throughout the world to achieve more profitable and sustainable production. We have reached where we are today by having the courage to think beyond the norm and follow slightly unconventional paths. We have had the courage to make mistakes and find new directions. Through our resolve, ambition and knowledge we have become a global player and a leader in innovative, user-friendly shaft alignment.

Sustainable innovations
During our almost 30 years in the industry, we have drafted, adjusted and experimented more than anyone. Some might say we are incurable innovators whereas others might say that we are highly focused. They probably have a point. If we hadn't been devoted and ambitious, we wouldn't have been the first in the industry to have a touch screen. Nor would we have been pioneers in the use of visible lasers and dual measuring heads.

Over the years, we have learnt to never compromise on quality and we are constantly in search of new, unexplored opportunities by combining advanced technology with design and function. By doing so, we have become the leading innovator in our sector. Not only do we minimize wear, production stoppages and costs, we also help save the environment. Natural resources are in short supply and if we can contribute to a more sustainable world by making it a little bit straighter, we couldn't be happier.


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