Once a log has seasoned and you've scraped off the bark, you need to shape it into a usable form. To do this, you need what is called a chain saw mill. Step one is to set up the rails that the saw will follow to ensure that you make a straigh cut.
Once the guide rails are in place, you attached a special guide to your 90cc chain saw. This guide consists of adjustable rails and rollers which sit on the guide beams.