In this guide, I will be using the T20 biscuit jointer.
The review for the T20 biscuit jointer can be found here.
First you have to decide which biscuit size to use (0,10 or 20). I’m going to use no. 20 biscuits.
You now need to draw witness lines across both of the boards to be joined. These witness lines are where the biscuits will be. It helps when marking the witness lines if you take a biscuit and roughly mark a center line on it. (Just to help you layout the witness lines.)
Make sure you set the biscuit jointer to the correct depth. In my case I’m setting it to 20, for No. 20 Biscuits.
The blue arrow is pointing to a small lever; turn this anti-clockwise to loosen the fence. Set the fence height to about half the thickness of wood you are joining, so the biscuit slot will be in the center of the wood. Tighten up the fence by turning the lever clockwise.
When setting the height of the fence, make sure it’s level. The red arrows are pointing to two scales, If they read the same the fence is level.
The biscuit jointer is now set up and ready to use.
Place the biscuit jointer onto one of the pieces of wood and line up the witness line with the red mark as shown on your right.
The pieces of wood I’m joining together are short so I’m not clamping it down, just holding it firmly with my hand. Make sure the fence is flat against the work piece and double check you’re still lined up with the witness line.
Turn the tool on and plunge the cutter into the wood. Follow this step with all the other witness lines..