Ray 10W horizontal lines photo engraving

[bulldogbob (Jan Wijkhuisen)]

Hello everyone, I am new here and hope to learn a lot via this nice forum. I have a Longer ray5 10W for a few months now. I am trying to engrave photos on slate and vanvas. During this engraving, horizontal visible stripes appear. I have tried everything such as adjusting the wheels and belts correctly. But that makes no difference, I suspect it has to do with my settings in Lightburn. Can someone share his settings so that I have a starting point to continue. I proces my images on imagR website. My settings are now:
speed 4800
power 35%
overscanning 2.5%
lineinterval 0.1000
dot widht correction 0.0.30

[JessN (Jess)]

I suggest you try out different line intervals as mentioned in our docs on how to achieve good image engravings: 5 Steps to Perfect Image Engravings - LightBurn Documentation

Don’t forget about utilizing the preview window before sending a job!

Can we see a photo of what your laser did to your more material for more context?

[Woodcraft (John Matteson)]

To expand on this thread, while it doesn’t directly answer your question, you can find more insights about photos here:

How to engrave portraits in wood

Engraving photos is the holy grail of lasering. It will take countless tries, hours of frustration and tons of wasted pieces until you will be completely satisfied and can handle a broad variety of materials and picture types. That being said, there are many excellent tutorials out there that will give you a starting point, but it won’t release you from the basic three steps of lasering: Test Test Test I collected some guides and videos here, but there are many more:

[MikeyH (Mike Hembrey)]

@bulldogbob

lineinterval 0.1000

This is 254 lines per inch. Your 10w might be capable of 318 LPI (.08mm interval)