On Saturday, 21 May 2022 08:38:01 EDT Nicklas SB Karlsson wrote:
> Den 2022-05-21 kl. 14:02, skrev gene heskett:
> > On Saturday, 21 May 2022 04:52:28 EDT you wrote:
> >> Den 2022-05-19 kl. 23:57, skrev gene heskett:
> >>> On Thursday, 19 May 2022 16:19:37 EDT Marius Alksnys wrote:
> Gene,
>
> how about setting min and max limits to zero (or other initial
> value),
> maybe also not enabling B drive?
> This can be done in a bash script like:
> halcmd unlinkp io-board-going-to-b-servo-drive.enable-pin
> halcmd setp ini.4.min_limit 0
> halcmd setp ini.4.max_limit 0
> halcmd setp ini.b.min_limit 0
> halcmd setp ini.b.max_limit 0
>
> or in HAL with mux_generic
> http://linuxcnc.org/docs/html/man/man9/mux_generic.9.html
> >>>
> >>> First I've heard of this, sounds like it could be usefull. ATM I'm
> >>> carving up an e-stop coupling between linuxcnc and a couple of
> >>> those
> >>> 3
> >>> phase drives.
> >>
> >> These 3 phase drives have STO Safe Torque Off you connect to a real
> >> emergency stop button? You use a safety relay?
> >
> > Not a relay in some cases, although on this machine there is a relay
> > because there's two power supplies. A 120 volt to run most stuff, and
> > a 250 for the spindle motor.
> >
> > The low voltage 127 feed and the 254 for the vfd are interlocked in
> > hal by being disabled when F2 is toggled off. In this machine by a
> > relay, but in most of my machines by BIG SSR's controlled by logic
> > level signals.
> >
> > The Fault outputs are simply linked into the E-stop to toggle F2 off,
> > and by cross linkage in the hal file, toggles F1 to the inactive
> > state also.
> A safety relay like this one in link
> https://se.farnell.com/pilz/pnozx4/relay-safety-3pst-no-240vac-8a/dp/43
> 01237?ost=pnozx4 missing before connected to the emergency button. This
> one seems to be German made, me myself have French pilz in my machine
> and guess it work equally well.
>
> It is common relay have an extra normally closed NC contact and plan is
> to connect these in series with a magnetic unlock mechanism to the
> door. If relays are correctly designed door will be locked until
> relays are fully closed.
>
No doors or housings on these beasts.
>
> Nicklas Karlsson
>
>
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> .
Cheers, Gene Heskett.
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