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Reply by JBrow

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Posted on Porter Cable Dovetail Issue

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JBrow

1368 posts in 1432 days


#1 posted 05-02-2016 03:49 AM

RobAdkins,

I have to believe that misaligned edges when the dovetail joint is brought together is because the stock was not firmly against the stops or the stock is at differing widths. I suspect the workpieces are the same width; but if the workpieces align along one edge but not along the other edge, the workpieces are of differing widths. I also assume that the prior dovetail joints successfully routed are of the same type requiring the same jig settings as the one in which problem arose.

I have learned on my Craftsman dovetail jig that the even though the stock seems like it is firmly against the stops, when I look sometimes they are not. Debris from a prior cut can get trapped around the stops, preventing proper contact with the stops. As a result, when I dovetail, I keep the shop vac handy. After I remove stock from the jig, I vacuum things off before making another cut. I also visually check to ensure the vertical and horizontal stock is properly set. I am not familiar with the Porter Cable jig or its stops, so I also have to wonder whether the stops got out of whack.

One idea to troubleshoot the problem if you have not yet done so is to place the misaligned pieces back in the jig as if they had not been routed. If in fact the vertical and/or horizontal pieces were not originally firmly against the respective stops, it should become immediately clear.

The workpieces variation in thickness may affect the joint, but I fail to see how it would affect the alignment of the edges. Establishing alignment of the bottom edges of the workpieces is the job of the stops.


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