PID [temperature] control causing PSU noise aka lights dimming, will autotune fix?

Controllers Smoothie
1

I tried PID mode for my bed, but that gave my PSU some nasty noise, which caused issues all around with the extruder.

Will PID autotune help fix this or should I just stick with bang-bang mode?

Imported from wikidot

2

This shouldn’t happen and is probably a symptom of your PSU being bad quality, or some big problem with your wiring or electrical installation.

3

Thanks for the insight, I’ve been considering upgrading my PSU.
I also read about resistors being added for the bed as well.

The PSU I have is Bronze rating @ 300w, I’ve already combined both 12v rails.
It’s not a brand I’ve heard of before, so I can’t really say if it’s good or bad either way.