Analog or PWM signal for psu

[Sascha Wald]

hi everybody,

I had response troubles with te PSU (water protect and laser on inputs were twisted). As I checked the rest of my wiring I saw two posibilities to control the laser power. You can send an analog or a pwm signal to the laser for controlling. Curently I use the analog output of the ruida controller and I read a lot of posts they have a pwm control for the laser power. Is there a big difference in response time or improvements when I change to pwm signal output? Thanks in advance.

regards

Sascha

[Dave Vigness]

For me, that would be a Russ question. You might post it on one of his latest videos in the comments and see if he gets back to you.

[Jeffrey Aley]

My feeble memory tells me that Russ' controller is set up to use PWM. He did a video from Florida, USA (and a few afterwards) where he showed oscilloscope shots of the two signals that go to the Power Supply. One is PWM - which controls the power, and the other is a digital "on / off" signal.

There's an index to his videos around here somewhere (search the forum) that should help you find it.

Sorry that this answer is not more specific. I do not believe he actually answers your question of "which is better?"

[Dave Vigness]

I'll add to that and say I seem to remember it was more PSU specific than anything, but not positive on that.

[Philipp Pap]

I think this is an interesting question. Is the adc in the ruida controller better or the one in the power supply?