Reply by Kazooman

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Posted on Problem with dovetail jig

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1413 posts in 2564 days

#1 posted 10-29-2018 10:03 PM

I have a Leigh dovetail jig and can concur that your problem looks to be related to the depth setting. If this was a guide bushing problem I would expect to see more of a variation in the side to side fit of the joints. Some might be OK while others are too wide depending on how you held the bushing against the sides of the template when making the cut. They seem to be uniform suggesting that there was little or no play in the fit.

As others have suggested, you need to do trial runs on “scrap” to dial in the proper settings. I put “scrap” in parentheses, because the pieces you use for this are critical to the eventual outcome. Use test pieces that are exactly the same thickness as your good workpieces. That takes a lot of potential concerns out of the equation. Once you have the settings adjusted to give a well fitting joint keep the last set of test pieces and label them (thickness, specific cutter used, etc.). You can use them to get you very close the next time you need to set up the jig and router for the same joint.

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