Patrick Spielman covers this subject in The New Router Handbook.
I don't have a scanner so I can't upload the drawings. I'm sure you can find it at your library. Basicly he uses an inclined jig block with a slot in it. On the bottom he uses sand paper so the guide won't move when you pull the router. He shows using both a Round Nose and "V" bits. The guide gives the 'tear drop' shape of wheat. He started by laying out the pattern on the wood and then moves the guide and router around.
I don't have a scanner so I can't upload the drawings. I'm sure you can find it at your library. Basicly he uses an inclined jig block with a slot in it. On the bottom he uses sand paper so the guide won't move when you pull the router. He shows using both a Round Nose and "V" bits. The guide gives the 'tear drop' shape of wheat. He started by laying out the pattern on the wood and then moves the guide and router around.
