Can someone explain me the knife wall method?

[tibi]

Hello,

Can someone explain me the proper use of knife wall method? It is described in Robert Wearing's book and also popularized by Paul Sellers and others.

Basically, I score a line around the board and chisel out a half V groove. Then I register my saw against the wall which should help me cut straight.

At the same time, I cannot register the saw against the wall, as the set of the saw would cut past the wall, so I have to cut just arbitrary distance away from the knife wall that I deem appropriate as not to disturb the wall with the set.

Or I can tilt the saw to cut a bit away from plumb to the outside.

So why bother with the knife wall, if I cannot register the saw plate against it?

Thank you.

 

[Ttrees]

The polished track should be remaining when the waste is cut off.

 

[niall Y]

If you cut vertically, with the set of the saw blade touching this wall you will have a square vertical cut. It is a convenient way for woodworking novices to achieve a good result.

Should you have a slight step, between the knife wall and the saw cut, then its a simple task to pare this away with a wide chisel registered against the knifed wall

 

[Blackswanwood]

This explains it:

 

[dzj]

At the same time, I cannot register the saw against the wall, as the set of the saw would cut past the wall

Best not to think about it. Somehow it works out in the end.

 

[Sideways]

Or just use a Japanese tooth saw with little or no set to the teeth and alternately ground bevels. You just drop the tips from one side of the blade into the knife cut and carry on down.