Why does it smell?

If there is insufficient power and speed, it takes more time to cut. In this case, it is more likely to cause black edges and a bad smell, sometimes even burnt wood, which gives a burnt smell.

How to reduce the smell？

Increase the working power and speed. This can accelerate the cutting process and reduce the chances of black edges and smell.

Use masking tape. By doing so, the cutting surface would be the tape, instead of the board.

Use an air pump. It can blow away the particulate emission from gasification during the working process.

Wipe and rinse the charred piece. You can also wipe the small molecules with a nano sponge.

If there is still a residual smell, try airing it out in an open space.