There’s lots here and lots missing…
What material and what speed (in mm/min)?
Do you have an air source to assist the engraving process.
If the leaf is sharp and angular or has lots of corners or direction changes the motion control may call for power reduction. This corner behaviour can change the output of the laser and create poor cutting.
Pics of the project would help immensely.
This may be worth review:
How To Ask For Help