What Is Machine Train Alignment?
A machine train alignment is the process of aligning the shaft centerlines of two or more machines that are coupled together. Many mechanics approach this as two individual alignments, but it is important to note that all three of the machine components are coupled and act as one machine.
In this example, there is:
- An electric motor
- A gear reducer
- A split-case pump
Common Challenges in Multi-Machine Alignment
Some things to keep in mind before you start:
- Any movement of the gearbox affects the alignment condition of both the motor and pump.
- If you don’t measure the entire train BEFORE you start moving components, a bolt-bound or base-bound condition is likely.
When viewed as individual alignments, it may not be clear how moving the gearbox to align it to the pump will affect the alignment between the gearbox and motor.
| Motor to Gearbox | Gearbox to Motor |
|---|---|
 |  |
How the Machine Train App Simplifies Alignment
The Machine Train Application can calculate moves based on which machine you choose to be stationary. In this example, the mechanics determined that making the gearbox stationary allowed them to shim up both the motor and pump. Both machines were shimmed to the required amount simultaneously.
The horizontal adjustments were made using the Acoem AT-300, and the alignment was rechecked.
Why Mechanics Chose to Keep the Gearbox Stationary
The Machine Train App allowed the mechanics to determine that:
- Making the pump stationary would have required a 0.180” horizontal move on the outboard end of the motor, which would have caused a bolt-bound condition.
- There was sufficient flex in the piping to allow a 0.050” horizontal move on the pump, so the gearbox was left stationary.
The entire alignment job, from roughing in to final alignment, took 58 minutes!
Benefits of the AT-300 with the Machine Train App
The benefits of the AT-300 with the Machine Train App?
- A tablet-based solution to complex alignment problems.
- Clearly defined options on moving machines.
- Easy PDF reporting of the entire job, which can be emailed, texted, or saved to the tablet, smartphone, or USB.
- Reduced downtime.
- Increased machine reliability.
Get Started with Machine Train Alignment
Interested in learning more? Reach out to Acoem for details or a closer look at how the AT-300 can support your alignment needs.
