Engraving not dithering blacks

I have products that I repeatedly made on my K40 which has black with darker black inside and when I engrave mow its just engraving solid black. Is there something I am missing here? Thank you in advance

Quite a few details, yes. Which settings did you use (speed, power, dpi, dithering mode, etc). A picture of the source image and one of the result would help too.

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