After reading many good posts here in the LightBurn forum about slate engraving, I have tried it myself, for the very first time. I have collected this slate tile from a dilapidated house which is at least 300 years old. It was used to protect the woodwork from snow and rain. I only have one and this one I turned into a gift.
I worked with 1600mm / min and 4-5 mA, cross-hatch 0.5mm, 45 degrees fill + line and with 2 passes. The slate has got (my own) beeswax before I engraved.
Without the overall experience from the forum regarding this topic, I would not have been able to complete the task without testing first, thank you. (… I do not have slates to test with either )