As we know, some major x-ray units have automatic input compensation techniques that can handle "reasonable" variations in mains voltage. But those are usually big three-phase machines.
Which type of machine do you have there? A "small" Japanese unit? It may not have any built-in input compensation, apart from the line resistance that is (should be) set up during initial installation. I'm wondering if it would help to adjust this (and then re-calibrate the unit) under "worst case" (low mains voltage) conditions. But all that work may be a waste of time and effort if the machine is then out of cal during "normal" mains supply!
The bottom line is that you may have to live with things that are outside of your control (
eg, the utility company). However, if I were you I would check (as far as possible) the power connections coming into the machine (check for tightness,
etc. ... but please be careful).
