Re: Laser Tube CO2 PSU
So the only way I can think of is if you hook up a power meter in series on the negative end (which is a good addition to ensure you aren't sending too much power anyhow). See elsewhere on the how to part for that.
Work up to 100% power in the controller (and therefore power supply) and see if you are in the recommended long term working range of mA for the tube you have. If the tube is not using up to its recommended mA when the power supply is at 100% then its under supplied by the power supply. If it is in the right range, you are fine.
A common alternative problem is that the seller sold you a system where they advertised the max power of the tube (not the suggested working wattage, the max wattage that works but will burn out the tube in short order) and the power supply is matched to that working power, not the theoretically maximum power. You would need to research the model of the tube you have first. Either way the process is the same but one results in the power supply as the issue, the other is the tube.
One is an under built machine to save costs, the other is a seller that lied.
In case anyone is wondering, I'm the twin of the other gfacer on cnczone...