Dear Sir ,
I attempt two single balances but added correction weights once .
1.Taken Reference run Vibration on both planes with phase .
2.Added trial weight on Plane 1 ,noted Vibration & Phase of both planes .
3.Remove trial weight on Plane 1.
4.Added trial weight on Plane 2 ,noted Vibration & Phase of both planes .
5.Calculated Correction weight and angle basing on each single plane response .
6.After adding correction weights , overall vibrations reduced but increased after next run .We do not added any extra weight .Customer wants to check once again .
7.Seven run method followed and added weight on plane 1 because no response on plane 2.again over all vibrations reduced some extent but not with in satisfactory limits .
8.Since the first visit, i them to verify bearings and coupling .But no use .
9.Finally i strongly said " Verify Bearings first " .
10. I had balanced so many equipment but not this kind of response .