Thanks to all,
now that I think to, on my other machine the driver enable is left
unconnected, so I think I will leave them unconnected.
Valerio
On Tue, 2017-04-11 at 11:53 -0700, Peter C. Wallace wrote:
> On Tue, 11 Apr 2017, Valerio Bellizzomi wrote:
>
> > Date: Tue, 11 Apr 2017 20:25:04 +0200
> > From: Valerio Bellizzomi <vale...@selnet.org>
> > Reply-To: "Enhanced Machine Controller (EMC)"
> > <emc-users@lists.sourceforge.net>
> > To: EMC Users <emc-users@lists.sourceforge.net>
> > Subject: [Emc-users] mesa setup
> >
> > Hello,
> > I am looking at the 7i76 manual and at the TB2 connector pinout (page
> > 5), it is evident where to connect the step and dir wires, it is less
> > evident where to connect the enable+ and enable- wires for each motor
> > driver.
> >
> > What is the usual setup ?
> >
>
>
> Normally Step drive "enable" pins are actually disable pins
> so the drive functions normally without these being connected
>
> In addition typically step drives are fairly safe in that unlike servo
> drives, they will not move without step pulses
>
> So its most common that these pins are just ignored
>
> If they are actually enable pins (powered to enable drive),
> they can be driven by a spare step/dir pin or 7I76 field output
>
> If your enable pins are actually disable pins (and you must power them to
> disable the drive), and you feel you need to disble them for things like
> emergency stop, perhaps the best solution is to drive them with a normally
> closed relay contact so the drives are disabled until the relay is energized
>
>
>
> Peter Wallace
> Mesa Electronics
>
> (\__/)
> (='.'=) This is Bunny. Copy and paste bunny into your
> (")_(") signature to help him gain world domination.
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>
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