Reply by splintergroup

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Posted on Is my INCRA Miter 1000HD defective?

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4141 posts in 2140 days

#1 posted 02-12-2018 06:58 PM

I get excellent results with my Incra, but I have learned that there are many parts of the cutting operation that can subtly alter the angle. This compounds when you try to complete a many-sided polygon..

The one trick I use for “perfect” joints is to cut the angles the best I can, and if there are an even number of sides I’ll do the following:

Join the segments together forming two halves of the circle. I like using blue painters tape stretched across the joints to pull the miter dead tight.

Now unless everything is perfect, these two halves will not join perfectly together. I place each half circle on a board that runs against the table saw fence such that the blade will take a small trim off of each end of the half circle (use double sided tape or toggle clamps). This establishes a perfect cut at 180 degrees which will mate perfectly with the opposite half.

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