Laser shaft alignment procedure

Laser shaft alignment is a precise method used to align two or more rotating shafts to ensure optimal machinery performance and prevent damage. Misalignment can lead to excessive wear, energy loss, and even mechanical failure. Here's a step-by-step procedure for laser shaft alignment:

Download PDF: Shaft alignment handbook

1. Preparation:

- Shut down the machine: Ensure that the machinery is off and locked out to prevent accidental startups during the alignment process.

- Clean the shafts and coupling surfaces: Dirt or debris on the shaft surfaces can affect the accuracy of the alignment.

- Inspect the machinery: Check for any mechanical defects or looseness in the mounting bolts, couplings, or bearings.

- Ensure thermal stability: Let the machine reach its normal operating temperature if the machine will operate under a heated condition.

2. Mount the Laser Alignment System:

- Attach brackets to both the motor (driving unit) and the driven equipment (pump, compressor, etc.) near the coupling area.

Download PDF: Laser shaft alignment handbook

- Install the laser sensor and detector units on the brackets. These units will emit and receive laser beams for measurement.

- Ensure secure mounting so that the laser system remains stable during the procedure.

3. Set Up and Power On the Laser Alignment Tool:

- Turn on the laser alignment system and check that the laser beam is aligned correctly to the detector on the opposite shaft.

- Input the shaft dimensions: Enter the dimensions of the shafts, including distances between the coupling and sensor, into the laser system's interface. These measurements are critical for accurate calculation of misalignment.

4. Measure Initial Alignment:

Download PDF: Shaft alignment pdf document

- Rotate the shafts by hand (if safe and possible) to different measurement positions (e.g., 0°, 90°, 180°, and 270°).

- The system will automatically record the laser readings at each position to calculate the current alignment condition (horizontal and vertical misalignment).

- Note the results: The system will show whether the shafts are misaligned in terms of parallel (offset) and angular misalignment.

5. Analyze the Misalignment Data:

- The alignment tool will show the type and magnitude of misalignment in both the horizontal and vertical planes.

- Depending on the analysis, the system will suggest how much correction (shim or move) is required for each plane.

Download PDF: Training manual of shaft alignment

6. Correct the Misalignment:

- Vertical alignment correction:

- Add or remove shims under the motor feet to correct any vertical misalignment.

- Re-check the measurements after each adjustment.

- Horizontal alignment correction:

- Adjust the motor position by shifting it sideways using jacking bolts or by loosening and tightening the mounting bolts to achieve horizontal alignment.

- Continue adjusting until the laser system indicates the shafts are within acceptable tolerance levels for both vertical and horizontal alignment.

7. Recheck Alignment:

- Once adjustments are made, perform another set of laser readings by rotating the shafts.

- Ensure the final readings show that the shafts are aligned properly within the manufacturer's specified tolerances.

8. Tighten and Secure the Machinery:

- Tighten all bolts securely while keeping the alignment results in check, as tightening can sometimes affect the alignment.

- Verify the alignment again after tightening to confirm no additional adjustments are required.

9. Documentation:

- Save or record the alignment report generated by the laser alignment tool for future reference and to ensure that the alignment was completed within specifications.

10. Restart the Machine:

- Once everything is secured and aligned, restart the machine and monitor its performance to ensure smooth operation and no unexpected vibrations or noise.

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