If you google MACH3 Interface Board you will get a large number of hits with photos of a Break Out Board that looks like this and depending on the source can be as low as $4.?

Needless to say documentation is found wanting and even labeling is suspect.? For example I tweaked the attached photo so that the Z limit is marked with P15 rather than P14.? When I was connecting to slotted sensors for spindle RPM measurement I found that the limit switch inputs weren't pulled to 5V but to 10V.

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So after spending about a day doing some reverse engineering I created a schematic.? Not all components have designators so I didn't bother.? It also wasn't worth the time creating a quad resistor array component so I just used an 8 resistor unit twice. ?Instead of 3 of the 4 resistor unit ones.

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Some of the traces were a bit hard to follow but I think I got the gist of it right.

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John

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"ELS! Nothing else works as well for your Lathe"

Automation Artisans Inc.

www dot autoartisans dot com

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