Saws for woodworking, how to sharpen the teeth what are the methods?

Woodworking saws are generally divided into three categories:

1 Saw large material saw teeth are generally right-angled, so that the saw is more laborious, more efficient.

2 Saw teeth relatively fine work, 90 degrees less than a little, sawing relatively not jump.

3 Saw teeth back, the angle of the back needs to be slowly adjusted, saw relatively fine work, such as saw cross-section, mainly saw mortise and tenon shoulder. ? Saw teeth need to be adjusted to the saw will not jump until. Simply put, such a saw amateurs can saw.

4 ? Such a saw teeth back angle is relatively large, the saw will not jump when sawing, anyone can saw. Generally buy online, basically disposable, there is no way to grind the business.

Saw path arrangement: 1 left 2 center 3 right.