Yep that's similar to what I do.  All enables are tied to machine on Hal
signal

On Fri, Oct 16, 2020, 7:51 AM Alan Condit <condit.a...@gmail.com> wrote:

> Hello All,
>
> I periodically try to start Linuxcnc without turning on my CNC controller.
> When I do I get the error message that indicates it is not finding the
> 7i76.  However, when I turn on the controller before Linuxcnc is
> initialized my steppers growl until Linuxcnc is initialized.
>
> So, I have been thinking about putting a power relay in the controller
> that would not turn on the power to the stepper power transformer until
> after Linuxcnc initialized using some signal like “machine-is-on”. So I
> would turn on power to the controller box before starting Linuxcnc but that
> would only turn on the 24v field power. The 5v power to the 7i76 comes from
> the 5i25 board.
>
> The lathe spindle power is currently controlled by a relay activated by
> machine-is-on, but I would probably change that to spindle-enable.
>
> Does this idea make any sense?
>
> Alan
>
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