On Tue, 10 Dec 2019, Gene Heskett wrote:
Date: Tue, 10 Dec 2019 11:18:11 -0500
From: Gene Heskett <[email protected]>
Reply-To: "Enhanced Machine Controller (EMC)"
<[email protected]>
To: [email protected]
Subject: Re: [Emc-users] Need a power signal independent of linuxcnc.
On Tuesday 10 December 2019 10:16:16 Peter C. Wallace wrote:
On Tue, 10 Dec 2019, Gene Heskett wrote:
Date: Tue, 10 Dec 2019 06:46:16 -0500
From: Gene Heskett <[email protected]>
Reply-To: "Enhanced Machine Controller (EMC)"
<[email protected]>
To: [email protected]
Subject: Re: [Emc-users] Need a power signal independent of
linuxcnc.
On Monday 09 December 2019 22:45:26 Gene Heskett wrote:
Greetings PCW and all;
I find I need a way to do a powerdown reset on the interface box of
one of my machines. And it needs to be separate from linuxcnc.
That, or some way to tickle the 7i76D to reset it before I start
LinuxCNC the second time because hal can't find spinout.
I am finding that little power bumps, not enough to do a full
powerdown reset, are killing the 5i25 to 7i76's serial com. Short
of rigging a 3rd hand switch on the shelf to toggle the interface
power, or getting out a stepladder to access the one on the rear of
the shelf, once the 7i76 has been bumped, the seriel port is dead
until a full, several seconds dark powerdown, there seems to be no
other recovery method that works.
Ideas anyone??? Or do I go get a switch plus socket and position
it where I can operate it from the front of the machine?
Thanks all.
Shucks, I was hoping there was a secret handshake I could put in a
rapper for linuxcnc that would tickle the right 5i25 bit(s) to do a
full reset on the 7i76D just before linuxcnc was started.
I would verify that your field an 5V power are OK at the 7I76 end.
I dont see any way a short power failure/glitch should get the system
into a unrecoverable state.
The supplies are separate x volt by several amps little boxes, and
voltages are +- .1 volts of 5 and 12 volts(field power)
This has occurred several times now and has always needed a powerdown of
some seconds duration to recover from. About a week ago during a storm
20 miles north I experienced about 15 minutes worth of flickering
lights, but no bumps to total darkness of the overhead lights.
The next evening the mobo in this box went up in flames with the fire
starting at where one of the usb2 breakouts was plugged into the mobo.
I moved the boot drive to an old dell 745 I pulled out of the midden
heap, but it didn't have enough memory to do much more than email.
Took me a few days to order enough stuff to put a new mobo of
considerably higher performance in this box, and when I had it up and
running, by moving that same boot drive back into the drive cage in this
boxes tower, linuxcnc refuses to run over an "ssh -Y shop" link because
the 5i25 isn't talking to the 7i76D over the serial link. Because I am
switching power to other things around this interface with this
interface, the interface itself is powered continuously, with no means
to reset it other than taking a short ladder to the back of the shelf
where power comes to the shelf, and toggling the switch on one of those
long 6 outlets gismos.
At the moment, that ladder is blocking my access and has all the chucks,
tailstocks and goodie plates for a BS-1 table on it, so just to move the
ladder, I first have to move about 80 lbs of stuff someplace else. And
I'm going to have to invent a skyhook just to get the BS-1 onto the
milling machines table as its 56kg all by itself. And my back is no
longer up for that sort of weight at 85 yo.
IMO the watchdog timer should initiate a reset after making a gui entry
that its bitten. Clearing the gui should initiate the reset. Then
restart linuxcnc and its all working again at the restart.
I still suspect something else is going on here, as we have never seen an issue
like this. I'll try and duplicate by cycling power slowly to a 7I76 multiple
times, but Like I say I have never seen this behavior before. The PIC code has
brownout detection and a hardware watchdog so should never be able to get into a
state that requires power cycling to recover.
So I guess I'll have to stop at Lowes on my way home from the
horsepistol tomorrow, and get one of those combo switch and outlet
gizmo's and a handibox.
Thank you Peter.
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>
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Peter Wallace
Mesa Electronics
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