Min + Max power and power scale -> implicit behaviour?

[berainlb (PY)]

@misken

grbl controllers actually DO use a power gradient, but that one is calculated internally. So, the actual power output is not constant, but depending on speed. But external systems like LightBurn have no influence here.

I assume you’re referring to variable power mode introduced in 1.1f. There is one mechanism in LightBurn to affect this. You can effectively disable variable power by using Constant Power Mode in cut settings.

@misken

If grbl systems set min power to 0 implicitly

It’s not GRBL that’s setting the min power to 0 implicitly. It’s LightBurn. LB does this for all g-code based systems as far as I know. And it does this for anything other than grayscale images.

So in your example it’s the latter option, 50% output power that would be the result for all non-grayscale image power scales.

With grayscale images power would be scaled proportionately as in your first option but with even more nuance since power is based on black level. I did a writeup on effect if min/max for grayscale if you’re interested.

How does Lightburn scale power

Your question has a few layers of nuance. But the simple answer is no, LB doesn’t take the floor and ceiling darkness values of that particular image and scale the power levels proportionately across those values according to 65% power. It’s kind of the reverse. Yes but… … then don’t understand this part. Not sure I understand what you mean by translates as. Here’s a simple model of how I understand this works. I’ll preface this by saying that this applies for grayscale images on diode lase…