Reply To: Twisted stock for laminated workbench top
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Tas,
Instead of starting from the left, try starting from the middle.
You might not obtain something like a “fully flush piece” but it is better to have irregularities spread because removing 1.5 cm on one corner is a lot (IMHO).
Removing 1.5 cm on the upper corner also means removing 1.5 cm on the other face. You would end up with a much thinner workbench-top.
With irregularities spread, you will remove less material (but on the whole surface – anyway you will have to flatten the top of the bench-top and its underside also)
In addition, you may try another sequencing of the various boards.
In fact, what you have obtained while dry clamping might be a “ruled surface” (see https://en.wikipedia.org/wiki/Ruled_surface).
You might be able to take the twist out of it.
It is a good exercise to flatten the underside before flattening the upper side. Although, strictly speaking, the underside needs only to be flat and out of twist in the two areas which will be resting on the leg-frames. (If not out of twist, the twist will be transmitted to the leg-frames and the workbench will rock – don’t ask…)