Greolt, what do you mean by switchmode? I'm used to the terms unregulated, unregulated doesn't keep the same voltage, regulated keep the volts the same no matter what.
Anyway, I was having the limit switch problem tripping, so I rewired the entire CNC with shielded cable (already had it on motors), made sure no wires laid on each other and kept the PS outside the enclosure so no 120V inside, grouped only like lines together. What a difference. I honestly believe it runs smoother!! The limit switch problem went aways and it's definately quiter. Thanks for everyone's help. It runs super smooth now.