Theoretical problem - looking for general rules-
you have a material - wood or heavy cardboard, leather, acrylic, whatever and your cut did not go through, and your engrave burned. For the moment you have a lot of detail so you don’t want to change the LPI or the depth of the cut.
You can change the speed, the power (assuming the cut was not full power before), or make up to two more cuts making it 3. Which will have more effect? Which will increase the amount of burn more than help? as much as I have experimented with various settings I don’t think I have more answers.