A planer will plane wood down to a specific thickness.

The manual can be found here

• Safety glasses are always required.
• Hearing protection and dust masks are highly recommended.

• Only use the planer with clean, new wood free of foreign objects (like nails). Pallet wood and barn wood should not be used in the planer.
• Make sure that the opposite face of the board is flat. This can be done on the joiner.
• Adjust the height to a little bit less than the current thickness. You should never remove more than about 1/16“ during one pass.
• Turn the planer on.
• Feed the piece through.
• Adjust the height again and repeat.