Over the past few years I have developed a number of Electronic Edge Finders (EEFs) to be used on both my lathe and mill. All of them tried to have a simple "idiot light" on them that indicated when the cutter (or equivalent) touched a conductive reference surface clamped to the rest of the machine.
This is easy when the change in resistance is greater than 3 ohms. Not too bad when the change is around 0.15 ohms, and down right hard when around 0.02 ohms.
Along the way I found that I...
When Sensitivity Means Precision
This is easy when the change in resistance is greater than 3 ohms. Not too bad when the change is around 0.15 ohms, and down right hard when around 0.02 ohms.
Along the way I found that I...
When Sensitivity Means Precision