Turn the pile on the table with the greatest care; do not lift it between cuts or jog it vertically. To test a pile for rectangularity, turn part of it one-half way around and match the edges.
To Square a Pile
First—Set the back gage about one-eighth inch further from the cutting edge of the knife than the desired dimension of the square. The extra distance the back gage is set beyond the dimension of the square will depend upon the amount necessary to trim it to a true, clean edge.
Second—Jog an uncut edge of the pile against the back gage and make a clean trim.
Third—Jog this clean trim against the side gage and just "feel" the back gage for distance. This trim is at right angles to the first.
Fourth—Now draw the back gage up to the exact dimension of the square desired.
Fifth—Jog either of the clean trimmed edges against the back gage (keep the pile away from the side gage). This trims three sides.
Sixth—Jog the pile against the back gage and trim the remaining uncut edge, keeping the pile away from the side gage. This completes the square.
To test a pile for squareness, turn part of the pile one quarter way around and match the edges.