Dear Experts ,
did you ever balance oval or bend fans successfully on site with in the tolerance . i have faced difficulty to balance so many times after repairs done onsite due to bending of fans Base plate and shroud .
Yesterday i tried to balance a fan onsite and it did not respond well after i removes the fan pulley belts and balanced statically .After the Vibration reduced from 55 mm/sec to 17 mm/sec .After the fan not respond for balance if additional weight added and vibration increasing .Actually it is a old fan and it has repaired onsite after hub cracks developed .
Need your feed back .