The factory depth gauges on most jointers aren’t very accurate. Even the best jointers seem to have flimsy and crude “pointer” style depth gauges. Here’s the simple improvement I made on mine: I fabricated a pair of aluminum brackets and mounted a dial calipers to one of them. The other bracket is a contact point for the caliper’s index pin. Now, I can set my jointer’s infeed table to thousandths-inch cutting depths with ease.
– Willie Sandry