Laser shaft alignment method

 Laser shaft alignment method

  • Considered a precision-based performance strategy, the laser alignment method offers a quicker and more precise means of aligning equipment.
  • It is less prone to operator mistakes and perfect for long-distance equipment alignment. this article does not go into great depth on the stages involved in laser alignment due to the differences in technology across manufacturers.


  • The installation of a laser alignment device on an electric motor and pump. One mounting bracket houses the system's position sensor and laser diode.
  • A non-hazardous, pulsing laser beam is emitted by the diode and is aimed towards the opposing bracket. the laser beam is redirected back to the position sensor by the prism in the opposing bracket. the shafts are rotated to get the vertical and horizontal measurements for angular and parallel misalignment, much like with other shaft alignment methods.
  • A little computer receives the shaft locations and readings automatically. next, the computer determines how much relative movement is needed at the moving machine's feet.
  • The accurate determination of misalignment is one of the main benefits of using laser alignment. misalignment may be detected to ±0.00004" with laser alignment. furthermore, bar sag issues are resolved by using laser alignment.
  • Nevertheless, the laser alignment approach has limits and downsides. the average cost of laser alignment equipment exceeds $10,000. The main purchasers of laser alignment equipment are service providers or businesses with large or many pumps.
  • Another restriction is the setting in which the laser alignment is, the ambient temperature needs to be between 32degree and 131fahrenheit. additionally, there must be no air currents, steam, or dust in the area.
  • These obstructions will make it impossible to accurately interpret the laser beam. To protect the beam from steam, dust, or air currents, a plastic pipe might be used.

Final checks and works closeout:

Following the alignment of the equipment, A few further duties and inspections need to be carried out:
  • Verify that each shaft can spin freely while the coupling hubs are in place.
  • The equipment has to be turned on, and the safety devices have to be taken out.
  • It is necessary to "bump" the driver in order to ensure the correct rotation.
  • Reinstall the safety measures and finish assembling the coupling in accordance with the installation guidelines.
  • Make sure that the connected shafts may rotate freely by rotating them.
  • As required by OSHA or other relevant regulations, install the coupling guards.
  • The equipment has to be turned on, and safety devices have to be taken out.
  • The drained pipe and the pump should be filled once the pump is ready to run. check the system piping and the pump for any deformation caused by poorly supported piping as they fill. inadequate, pipe support might result in misalignment.
  • After the pipe is placed, the pump unit is turned on and allowed to warm fully. while the pump unit is still warm, stop it and examine its alignment. additionally, it guarantees that there isn't any extra pipe strain.
  • The extra pipe strain needs to be adjusted if alignment is needed to be greater than 0.002" from the pipe-free state.
  • After the final alignment is finished and satisfies the requirements, the pump and driver feet are drilled and dowelled at two spots, close to the thrust bearing end, for high-energy and petroleum pumps.
  •  For the equipment to be installed and operated, alignment documentation is essential. On an alignment form or datasheet, note the final alignment tolerance. this ought to be included in the history file for the equipment. this enables a starting point and historical data for the future, in addition to providing verification of the ultimate condition.
  • With this knowledge, subsequent work will be able to align more quickly and smoothly, reducing setup time. moreover, it will offer a foundation for operational time measurement.
  • Soft feet, pipe stress and strain, coupler, and shaft runouts, Installation problems such as bolts discovered loose, and defining the initial, intended, and final alignment information can all be included on reporting or recording sheets.
  • Additionally, the sheet needs to have a space for the names of the people finishing the task that needs to be recorded. this puts the onus of producing high-quality work on the individual and offers possibilities for learning in the event of failure.
  • Troubleshooting and root-cause analysis of equipment failures are made possible by the reported data. it is possible to compare the "as discovered" and "as completed" conditions using the data. for equipment that exhibits persistently aberrant behavior, this can be especially helpful.
  • Digital photographs are another helpful tool for data recording. images of the foundation conditions, base connection, and shaft may be preserved. these might be utilized to ascertain any unique requirements or the manner in which the installation was left during setup in the future.
  • Alignment should be rechecked when observations are made regarding the settling of the base, foundation, or soils, changing of the piping system, process changes, or seasonal temperature changes, even though it shouldn't be scheduled to be checked as frequently as a preventive maintenance procedure.
  • Three to six months following the original installation and alignment, a review of the alignment should be planned for a fresh installation.                         

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