[Mr.Chips]

Need assistance in setting up Z axis auto zero.
Mach3, Warp9 SmoothStepper ESS, BOB C25S, Gecko 540 stepper driver.
15 year old scratch built CNC, linear rails, Ball screws.

Need some help in configuring Z auto axis zero, wiring in Mach3 and BOB,
Instructions from: guruBrew YouTube.

BOB: wire one to PIN 15,
Wire two to ground

PORTS AND PINS: PORT 2, PIN 15, Active low. SAVED AND RESTART

The digitizer light should light when wires are touched, but it is lit all the time.

What am i doing wrong?
Thanks

[awerby]

If the wires touch and conduct electricity between themselves by doing so, wouldn't that be "active high"? If it's lit all the time, with them disconnected and not doing anything, that would be the "low" position, no?

[Vlod]

Have you set it as “probe in” pin.
In Mach3 you can use autoset when you define your pins, it automatically finds and set it up ( port and pin) when you momentarily connect it.
I think it has to be define as “digital IN” pin other way it wouldn’t work