Luban carpenter formula

Luban carpenter's formula is as follows:

1, about carpentry: long carpenter, short blacksmith, neither long nor short stonemason.

Explain the characteristics of different industries and processing objects. It also explains the ingredients of carpentry and some working procedures (such as the length of tenon, cupboard door and drawer, etc.). ) there must be a certain margin, rather long than short, rather big than small.

2. About wood: dry for a thousand years, wet for a thousand years, dry, wet and wet for two or three years.

It is about the relationship between wood moisture content and wood service life. When the moisture content is very small or large, the service life of wood is very long, while semi-dry and semi-wet or sometimes dry and sometimes wet, wood is easy to decay.

3. I have an axe for three years.

It is not easy to master the plane, and it is more difficult to play with an axe than to use it well. Similar to the proverb: a thousand-day hammer, a hundred-day axe, you have to learn sawing all morning.

Distinguish the principle of wood, see wood grain clearly before cutting along the stubble, and chop the axe along the stubble direction.

4, stand in one room and nine, don't push yourself, stand in one room and eight, it's useless.

Refers to the angle between the planing edge and the planing bottom. If the vertical side of a right triangle is one inch and the horizontal side is nine points, the plane is installed on the hypotenuse. The included angle of two right angles 1: 0.9 is 48.0 1 degree, and the included angle of 1: 0.8 is 5 1.34 degree. The angle is small, the planer can be laborious and labor-saving, but it is easy to leave stubble.

5. Whip the fast cow and see two heads.

Slow and steady, don't kill lightly, don't slow and steady, go straight gently. Use the saw smoothly, lightly and straight. The teeth should be sharp, the material should be uniform, the use should be labor-saving, the sawtooth should be sharp and the material path should be uniform, so that the saw can be used.