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Tricks for truing lumber without a jointer

For a cupped board
Curve board with clamps
Enlarge Image
To flatten the board accurately,
cover your tablesaw with craft
paper and use it as a flat reference
surface when attaching the runners.
Curve board thru planer
Enlarge Image
On roughsawn boards like this one,
the flattened area becomes visible
as it exits the planer. Make repeated
passes until the face is completely flat.

For a cupped board

Cut a pair of straight runners the length of the workpiece and glue them to both edges, as shown at right. After the glue dries, remove the clamps and run the assembly through the planer -- crowned face up. Continue planing until the planer flattens the entire top face of the board. Then, flip the workpiece over and run it through the planer again to flatten that face. Use your tablesaw to rip away the runners and square the edges.

Continued on page 3:  To flatten a twisted board


Comments (4)
2ward2 wrote:

If one has no jointer, cutting the wide board into thinner strips will mean each strip is flatter to the table saw than the complete board. If one reglues the strips, the same cupping tendency will remain, but if alternate strips are turned over, that tendency will be evened out. Edge "jointing" the strips with the saw should help to achieve better glue-up. Of course, a hand plane, or even a router table can help those edges.

8/19/2014 01:35:18 PM Report Abuse
2ward2 wrote:

This method will guarantee a thin board. I think wood thickness can be better preserved with less wood loss by ripping the board into thinner strips, jointing the edges then re-assembling by edge gluing the strips back together. Most of the cup will be gone and irregularities can then be planed off manually or with a planer.

8/19/2014 01:28:13 PM Report Abuse
billself60 wrote:

Yeah. I saw that to (pardon that pun, hun). =-)

1/16/2014 11:02:43 AM Report Abuse
schneierm wrote:

"Too" thick

1/16/2014 09:53:10 AM Report Abuse

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