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Posted on Incra Poisitioner - why set the scale to 0 for scoring pass when the bit protrudes?

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1554 posts in 3098 days

#1 posted 12-20-2013 11:00 PM

When you’re doing half-blinds, the zero isn’t really zero = edge of board. It just means that zero = same distance from edge for each board. If you continue watching the video you’ll see where he finishes that board, and then clamps the other board to the crosscut fence. By going back to zero he ensures that he starts cutting the same width in on that board as he did on the first. It might look confusing, but it makes sense once you do it a couple of times. If you don’t have the big instruction book, it’s much easier to understand than the videos and you can keep it open right there on your router table and go step by step.

Edit: Another way of thinking about it is that you aren’t going to be measuring in 32nds or 16ths. With the LS Positioner you are going to be setting a zero point and then using the ruler to go 1A 2A 3A, 1B 2B 3B etc.

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