OSH Park ~ Sign up
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OSH Park ~ Sign up
By James Harton, Resistor. An electric ecosystem | |
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"Anyone who believes exponential growth can go on forever in a finite world is
either a madman or an economist."
-Kenneth Boulding, economist
Corporations are NOT people and money is NOT speech!
From: Gene Heskett <[email protected]>
To: [email protected]
Sent: Wednesday, December 14, 2016 8:53 PM
Subject: Re: [Emc-users] Machinekit? --> LinuxCNC computer
On Wednesday 14 December 2016 13:14:34 andy pugh wrote:
> On 14 December 2016 at 15:47, Gene Heskett <[email protected]>
wrote:
> > Haven't tried, its been screwed for close to the time limit of my
> > backup storage setup.
>
> You said:
> "But uspace-linuxcnc is
> running, gfx and all, on the R-Pi 3b, smoothly enough for this picky
> old man. "
>
> On the 29th November. That's 2 weeks ago.
well, so much for that Idea. tar was cleaning house, getting ready to
overwrite everything non-volatile from / up, and its crashed. No
bootable card left.
Convinced as I am that I've somehow blown a gpio pin anyway, I just
ordered 2 more pi 3b's, with heat sink kits from mcm @$35 each plus tax
& shipping. And Jeff Epler has not replied as to whether he has any
spares of the spi adaptor board he designed and put on OSHPark share.
And I can't get it from OSHPark because there is no place to create an
account, only to login if you have one. Strange way to do business IMO.
Or my cataracts are worse than I thought. Shudder. I'll put another sd
card in the writer & put another copy of Jessie on it, but nuke the
passwds for root and pi before I stick in back in this pi so I can at
least set a longer root pw, and a user pw that is the same system wide.
But as unstable as the stock install is with the rt kernel, I'll have the
next 2 pi's on hand for insurance before I get serious about loading up
lcnc again. Or just say screw it and bring the old Dell & its 5i25 close
enough to work it. If I could find some breakouts usable. What I have
has 1/3rd of its ports screwed up with something or other for Machs
bastard setup. And CNC4PC has discoed their good board. Rev 4 of the
C1G. I thought I was getting one from John T., but it was a rev3, with
half a bushel of 20 kilohertz max opto's on it, Rev 4 has no opto's, and
a 10ns propagation time in either direction. Great card even if it was
$90. With a nice brite led on every line going both ways, makes a great
troubleshooting tool when first hooking stuff up... Encoder acting
funkity? Roll the chuck a few degrees and watch the leds.
I am about done with re-inventing these wheels only to have shitty
hardware like these female-female jumper cables destroying something
damned near every day. If I had been able to carve hal code with half
the time I've spent trying to stay half a skip ahead of these jumpers
and apt, I'd have been making swarf 2 weeks ago instead of going to bed
so damned discouraged I am not getting enough sleep every night for the
last 2 weeks.
I am not kidding about these jumpers, you can peel one off the bunch,
plug it over a pin on an old 40 pin ide interface card, slowly turn the
card over so its hanging down, and it will fall off the pin before its
hanging straight down. I saw how cheap they were, and bought some from a
different vendor for a dollar more, same exact crap.
I just found an old 40 wire IDE cable with 3 connectors on it. So I'll
cut one end off with about an inch of cable I can strip and stick it in
some solderable perfboard, make up another 8" 26 wire with the 26 pin
IDC header plugs to fit the 7i90 if and when they find my mailbox, and
make up an adapter cable, with series terminating R's on the perfboard,
that cannot be installed wrong as long as the pin one arrows are obeyed.
Not your fault Andy, but that Murphy that wrote all those laws lives
here. Apparently for free.
So I'll get started on a new cable tonmorrow.
Take care, Andy.
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)
Genes Web page <http://geneslinuxbox.net:6309/gene>
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