Dot width correction

[JVL (Jan VanderLinden)]

Can someone direct me to where I can find out what this button does?

[berainlb (PY)]

Oz explains it here:

Dot width correction?

It’s a new setting for images that is used to compensate for the fact that your beam has width. If you tell LightBurn to dither an image. On a 50% grey bit, it produces alternating on/off short line segments, like this: [image] If you draw the width of the beam, it looks more like this: [image] If you look at that 2nd image, the gaps between the lines are shorter now than the lines themselves, because of the shape of the beam. ‘Dot Correction’ is the total amount to shorten the line, t…

[JVL (Jan VanderLinden)]

Thank you, Very interesting read. Going to try it today.

[JVL (Jan VanderLinden)]

Does dot width correction work with passthrough?
I noticed that my line interval is greyed out when using passthrough.

[berainlb (PY)]

I haven’t tried it but I would expect not. Passthrough literally means “don’t do any processing on this and send to the laser as-is”. Then the controller just does the best with what it gets.

[JVL (Jan VanderLinden)]

What you’re saying makes sense.
However, in passthrough while my line interval is greyed out, i can still put in a value for the dot width.

[berainlb (PY)]

Trying to think how that would work but can’t come up with a solid hypothesis that doesn’t break down with some scrutiny. It’s possible that the field is ignored with passthrough but not sure.

Perhaps the @LightBurn folks can enlighten us.

[dkj4linux (David Johnson)]

I played with dot correction a bit here…

More fun with lasers, Lightburn... dot correction, ceramic tile, and window glass

An update on recent NWT efforts… and some tests with Lightburn’s dot width correction setting. As you may or may not know, it is an adjustment for a line’s true length, which when lasered is extended by 1/2 the laser’s “dot diameter” on each end. It is especially useful for dithered images which are made up of many extremely short line segments. The effect of no correction on a dithered image is a darker burn and some loss of detail while adding dot width correction lightens the image and brings…