Here’s my shop-made version of a micro-adjustment jig for use as a router-table fence.

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Here's my shop-made version of a micro-adjustment jig for use as a router-table fence. I made mine out of inexpensive MDF to the dimensions shown. The threaded rod, which is epoxied into the grooves, has 32 threads per inch allowing you to position the fence in precise 132 " increments. The knob then locks it in place. To make minute adjustments, just unlock, move a step, and re-lock.
—Frank DiMezzo, Rome, N.Y.