December 19, 2012
What if you had to leave a machine slightly misaligned? What would you choose, angle or offset?
By Brad Case
As alignment professionals we all want to do the right thing and perform the best shaft alignment possible; however there may be a time when you have to choose and knowingly leave a machine slightly misaligned for the short-term until other corrections can be made to the equipment to get it to an “alignable” condition.
For example; while performing a Verti-Zontal Compound MoveTM on a motor pump set, during the OJT portion of a Fixturlaser XA Pro training class, the mechanics found the motor to be bolt-bound when making the live horizontal adjustment. The FeetLock Function of the XA was used to easily correct the bolt-bound condition with a small adjustment to the motor and pump.
Prior to that, the class found the motor was just “slightly” bolt-bound. They could adjust the rear feet to get the horizontal angularity in tolerance but the offset was slightly out of tolerance.
Conversely by adjusting the motor’s front feet they were able to get the horizontal offset in tolerance but the angularity was then slightly out of tolerance.
After several failed attempts to get both the angular and offset coupling values in tolerance, via only adjusting the motor, the FeetLock Function was utilized as previously stated.
This however let to the question: What if, at this point in time, you could not move the pump and had to leave the machines slightly misaligned until other corrections can be made to get the equipment into an “alignable” condition. What would you choose? Slight angular misalignment or slight offset misalignment?
So dear VibrAligners, we would love to hear your comments as to which condition you would choose and your reasons for doing so.