Ciao Valerio,
It is a new machine or used? Because actually the emergency law (uni -
direttiva macchine) talk about 4 level of emergency ... in one of these levels
we talk specifically about enable. In any case by the law yuo're making a new
machinery, did you know that? In UE retrofit understood as the mean in other
part of the world no longher exist. [☹]
These only for your info ... in real world many system integrators not very
strictly comply with CE laws on security ... in fact sometimes are overly
restrictive. unfortunately the risk becomes all of those who break the law. Not
worth it.
regards
giorgio
________________________________
Da: Valerio Bellizzomi <vale...@selnet.org>
Inviato: mercoledì 12 aprile 2017 19.44
A: Enhanced Machine Controller (EMC)
Oggetto: Re: [Emc-users] mesa setup
Ciao Giorgio,
my other machine was actually sold to me without the enable pin in the
safety chain.
On Wed, 2017-04-12 at 16:19 +0000, giorgio foga wrote:
> Hi Valerio,
>
>
>
> Peter suggest obviusly is right,but in our laws (CE) if there is you must use
> the enable pin in the safety chain .... obviously if the machine is for you
> and only you can do as you please. I know it's something to be pedantic
> people ... but I think it is correct inform you since you're still under
> development.
>
>
> regards
>
> giorgio
>
> ________________________________
> Da: Valerio Bellizzomi <vale...@selnet.org>
> Inviato: mercoledì 12 aprile 2017 10.07
> A: Enhanced Machine Controller (EMC)
> Oggetto: Re: [Emc-users] mesa setup
>
> 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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