Reply by JBrow

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Posted on Router table cabinet

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1368 posts in 2212 days

#1 posted 10-21-2016 01:37 PM


A dry fit on basement or garage concrete floor could account for the errors observed. These concrete floors look flat and smooth but in my experience they are not. In the photo there appears to be a slight shadow near the right side between the floor and plywood on which the cabinet sets, suggesting the plywood of the floor is not setting perfectly flat. In addition a dry fit that is not clamped can also leave the impression of small errors. Lastly the dry fit in the photo suggests the cabinet top setting on two different pieces of plywood. If the two pieces of plywood are from two different sheets of plywood, then the thicknesses of the two pieces of plywood may not be the same.

Before deciding on a game plan, redoing the dry assembly might be a good idea. The table saw would offer a flat surface. When redoing the dry fit, orienting the cabinet right side up could also eliminate some potential error. Before assessing for any errors, measuring the diagonals of the dry fit would ensure the assembly is square. An out of square assembly could leave the impression of error when none exist. With these steps taken, greater confidence could be placed on an evaluation of the various dimensions.

If an error in the height of the sides persists, then the center dividers that define the drawer bank sides could be trimmed by some amount, perhaps a ¼”. Then shims of the proper size could be added to the top of the dividers, much like edge banding plywood. If the shims are made of solid wood, planing and scraping could be used to achieve the perfect height.

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