Some modifications must be made to the cabinet lock to allow the shaft of the rotary encoder to be securely attached:
- Drill out the screw hole in the cabinet lock body to allow the shaft of the rotary encoder to be inserted snugly into the body of the lock. A washer or two may be needed to ensure the bar on the cabinet lock is securely pressed against the square mount on the cabinet lock body.
- Drill a hole in the side of the cabinet lock body and tap it to allow a hex set screw to be secured against the rotary encoder shaft. A hole must also be made in the cabinet lock barrel to allow access to the set screw
- Remove the rotational stop from the cabinet lock barrel. This design uses the stops of the rotary switch instead.
The five positions of the key switch. The last position (START) is spring loaded and returns to BOTH when released.