The problem with X-ray units and such like is that they draw very little current in standby, but a lot during an exposure. As a result you cannot correct for voltage drop under load, because by the time your stabiliser kicks in, it is too late.
The problem is overcome by predicting the voltage drop that will occur, but this assumes that you know the mains resistance. Calibrating an x-ray unit is usually done automatically during the setting up of the unit, which makes a number of exposures, and then calculates what the settings have to be to give the operator the values that have been selected. Any change in mains resistance will mean that you have to go through the setting up procedure again.
Using something like a larger version of the VPower unit shown will change the mains resistance every time an exposure is made, which would give some very interesting results. You might do better to use an old fruit machine to calculate the exposure factors!
