Hi all, looking for some advice on carrying out trim balancing a Flakt woods fan unit. Let me try to paint a clear picture of the unit set up. It's a pretty basic set up with an electric motor and belt/pulley driving fan, the shaft for the fan has bearing pedestals mounted within the fan tunnel. Fan on one end of the shaft and pulley on the opposite. Nothing overly complicated. It's just tiny, fan is 400mm in diameter.
I'm about to revisit the site to carry out trim balancing using a One Prod Falcon from Acoem, which I've had great success with on other applications. Here's my issue, the unit is so miniscule that my single axis accelerometer has zero chance of fitting inside the unit to take a reading from either of the bearing pedestals. Not an issue I've encountered before in my short experience of this.
Would I be able to take a reading from the outside of the unit without chasing myself trying to balance it?
I've little options but to try that, I'm just interested to see if anyone has had a similar experience. Any advice would be greatly appreciated!