PT Bunestar Sinar Dunia – The person in charge of scheduling has an uphill task when it comes to allocating time for technicians to perform precise alignment on a machine. In many cases, they may just guess, based on the previous average of the time taken. The answer is not that simple.
in an example of aligning the motor to the pump to demonstrate the correct steps when aligning the engine. in starting the alignment, all safety procedures have been carried out, and the machine has been roughly aligned. Soft foot values are within tolerance. in the example the engine alignment was completed in less than 45 minutes, within the tolerance specified for 1200 RPM.
in another example on a turbine engine. Some things are also going well. Safety procedures had been taken care of by the time I got there. The clutch guard and clutch element have been removed. The engine has also been roughly aligned. Custom order shims for generator legs are available on site. Even with all of this going according to procedure, this alignment took a day and a half to complete.
Soft feet can cause problems
There are things that arise during the alignment that cannot be planned. One of them is the condition of flabby feet. Not checking the soft feet can greatly increase the time it takes to align the machine, especially since the response to corrections set by your straightener will not be accurate. Therefore, knowing the condition of soft feet and minimizing them, is the key. However, that itself can take a long time, depending on the condition of the base plate, the condition of the anchor bolts, washers, pipe tension, etc.
Machine size is important
In both cases, they are single clutch alignment. Aligning a large generator is definitely more difficult than a 200HP motor. In the first case, start the motor with a rope wrench yourself. In the case of a generator, it needs to be separated because the two engines cannot be rotated together. In most cases, larger machines take longer to align as removing the bolts alone can take 20 to 30 minutes. In addition, there may be a large difference in the amount of time required to complete the alignment, between two identical sets of machines. The information obtained here can help reduce sync times.
The bottom line is that no fixed amount of time is required for machine alignment. If the scheduler makes a mistake, the scheduler should always be on the conservative side.