What does the green knob on top of the Domino joiner do?
The green knob on top of the Domino joiner is the mortise width dial for setting mortise width. When using the stop-pins to index off an edge of the work piece, use the first setting. This will cut a narrow mortise for a tight fit to align the work piece. The wider mortise settings are for running Domino tenons in series using the Cross Stop when precise alignment is not needed. Using the cross stop to cut mortises in series saves time on layout.