The illusive Boxford 260vmc

[irving2008]

Irving, your wish is my command.....
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Does this help?

Yes. with that number of holes was probably used for closed loop spindle speed control rather than just speed measuring. Have you retained the spindle speed controller and do you plan to reuse it? Even at this age it would have been 0 - 8v or 0 - 10v control signal and MACH3 can drive that through a suitable speed interface and that might be a lot easier than finding a suitable replacement speed controller. Any idea what the max spindle speed might be?

Yep,thats a RPM timing sensor.

Thanks for that in-depth insight...