We've all been told to flip a plane over and visually sight down the bed to check cutting depth and alignment of the blade, then make micro-adjustments and test cuts. That's often hit-or-miss, and it lacks precision and repeatability.
iGaging has a solution with its new digital tool to check plane blades. With Plane-Check, precise plane iron settings are a snap. To set the depth, place Plane-Check across the blade, then adjust it to the settings you want. You can literally watch your adjustments on the digital readout. To make lateral changes, set Plane-Check on one side of the iron and adjust as needed, then repeat on the other side.
Strong magnets hold the digital on the plane bottom while you slide the digital along the blade to check for cutting depth and parallelism.
James Hamilton explains the different ways to tune-up a plane.