Using the Jet JSG-6DC Sander is quite straightforward. First, make sure the power is off and the machine is unplugged. Then, adjust the belt and disc tables to the desired angles according to your sanding needs. You can use the dual thumbscrew belt tracking adjustment to keep the belt on track. To change the belt, use the quick release belt tension lever. And for disc changes, the quick lock dust cover allows for fast operation. When you're ready to start sanding, plug in the machine and turn it on. Remember to always wear safety goggles and a dust mask. As for maintenance, regularly check the belt for wear and tear and replace it when necessary. Keep the graphite-covered steel platen clean to ensure it runs cooler. Also, make sure the dust port is connected to a dust collection system to keep the workspace clean and the machine running smoothly.