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Reply by defrosted

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Posted on shooting board help

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defrosted

26 posts in 128 days


#1 posted 07-31-2021 02:11 AM

there are a number of videos and such about table saw sleds that talk about the 5 cut test. The gist is that you cut one side, then rotate that side to the back of the sled and make cut 2. then 3 and 4. and then recut the first side again. Then measure the corners. By rotating the stock all the way around like this the last corner will have magnified the error of the sled, making it easier to quantify the error and fix it.

You have accidentally recreated this effect and your last corner has 4 or 5 times the error of the others making it easier to see, while the others look pretty dead on to the eye. If we had the dimensions of the board, and we knew if the odd angle out was more or less acute than 90 we could calculate the angle error of the shooting board fence and/or the distance of error of one end of the fence. If you happened to wobble or pivot on the narrow endgrain while shooting either of the sides it may have made it even worse. Or covered up part of the error. odds are 50-50 or so.

I would think jointing one side, then the opposite side and making sure they are parallel with callipers or such, then shooting the ends would give more consistant usable results even with this shooting board, which guessing from the age of the post has either been fixed or trashed years since.


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