CNC Tool Probe
Description
This is a normally closed touch probe for your CNC milling machine. Mine is a Stepcraft 420. The contact point is a small (4mm) diameter rod that is spring loaded to keep the contacts closed until the tool presses it down which opens contact. This is not a probe for co-ordinate measurements or probing dimensions of a part, Thingiverse has lots of those too. There is a much easier "Quick and Dirty" sensor made by "kinasmith" as shown in their instructable https://www.instructables.com/Make-a-Tool-Length-sensor-for-Stepcraft-2-CNC/ Notice that theirs is normally open and they had to set the probe as *active low*. This is not needed for my probe which is active high.
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