Stepper Driver Enable Pin

Hello all, I have a question about the enable pin on my stepper drivers, I have 4x DM542T stepper drivers from Stepper Online connected to my Mesa 7i76EU. Is it recommended to connect the enable pins to the Mesa, and if so where should they be connected to. Or should I leave them unconnected.

They are actually disable pins, not ensable. Its best to leave them disconnected as you have enough to worry about for now. Sometimes they are useful for estop but as Tommy says leave well alone for now;

Will do thank you. How would they be connected to estop, for future reference

I like to wire E-Stops to power, not enable pins, with as few steps as possible. Soft e-stop can control an enable/disable line, but "real" e-stops I want to pull power from motors. On my machine, it's set up so that the Mesa card is powered separately from the motors/spindle. The Mesa card directly controls the enable lines for the motors, but the power enable signal (to a relay controlling motor power) is also physically routed through the e-stop button such that pressing the button will remove power regardless of what the Mesa card wants. You can get e-stop buttons with multiple switches in them if you want/need multiple circuits being separately switched by one physical button.

I generally also like to wire things such that "power applied" is "enabled", so that a broken wire or loose connection will only disable the machine.

If you've got other safety hazards from just yanking power (eg, a Z axis that could fall), you may need to consider those.