On Sat, 27 Oct 2018, Gene Heskett wrote:
Date: Sat, 27 Oct 2018 03:40:48 -0400
From: Gene Heskett <ghesk...@shentel.net>
To: emc-users@lists.sourceforge.net
Cc: Peter C. Wallace <p...@mesanet.com>
Subject: Re: [Emc-users] 5i25 gpio's
On Friday 26 October 2018 23:26:38 Peter C. Wallace wrote:
On Fri, 26 Oct 2018, Gene Heskett wrote:
Date: Fri, 26 Oct 2018 21:17:29 -0400
From: Gene Heskett <ghesk...@shentel.net>
Reply-To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
To: emc-users@lists.sourceforge.net
Subject: [Emc-users] 5i25 gpio's
Greetings all;
I just hooked up a couple cables to the BOB on a 5i25's p2
connector. But gpio 31-32-33-34-35 apparently have no pullup.I
searched thru the hal file looking for gpio.013, which is the pin
all three switches formerly shared and is wired to p3-10. Those
pins have a pullup, to about 4.85 volts.
All I/O pins on P2 and P3 have 3.3K pullups
Thanks Peter. I think its time I bought/made a bigger box, and moved both
bobs out to where I can access them easier. This ones a mess, with an
ice cube relay on its lid controlling a vacuum cleaner and other
accessories that go with adding a 4th axis. Those heavy cables from/to
the socket the vac is plugged into make it difficult to pull the lid and
do things. There is stepdown boards, and charge pump buckets etc in it
that aren't even mounted solid. Time to make a bigger box and put both
bobs in it. Just gotta get my eyes usable again. Or say to hell with the
5i25 and get a lash-up like I wound up with the on the Sheldon, a 7i90HD
and 3 7i42TA's. The 7i42TA's make that a very convenient lash-up to wire
up.
You might consider something newer like a 7I76E (this has 5 Axis of 10 MHZ
capable step/dir, and spindle encoder, 0 to 10V analog spindle control
and 48 12/24V digital I/O: 16 outputs and 32 inputs)
That brings up the question: Is the motherboard parport fast enough to
talk to the 7i90HD with the parport firmware or do I need to get a
faster epp parport card too? Its a bigger Dell, dual core intel cpu.
Motherboard EPP ports are usually fine
The spi port on the pi is faster, but I've not found an spi card for x86
machinery yet. Not to mention that cable from the pi to the 7i90 is only
an inch long. Writes at 42 megabaud, reads at 25 megabaud, in 32 bit
packets. The 26 pin cables in this build are now 4 feet long, likely not
too good for error free data, although I haven't noted a problem from
that, yet. But either the bigger "bobs only" box, or the 7i90->3 7i42's
would cut that cable down to about 18", which can't hurt, and any gpio
on the 7i90HD can be input or output, something that greatly simplifies
the programming when one isn't limited to 5 inputs per bob.
The EPP interface is much slower than the SPI and less noise suceptable
but nowdays Ethernet is probably a better option
I don't recall ever having to make a std parport pin an input an
input, but somethings out of whack. I'll take the box apart again
tomorrow to make sure that BOB is powered. I'm also considering
making a new, bigger box, and moving both bobs to it, this machine's
bob wiring has about exceeded the real estate dedicated to the bob
interface. Needs more playroom.
In the meantime, if this rings a bell, with 5i25b users, speak up.
Thank you all.
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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Peter Wallace
Mesa Electronics
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nks
--
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>
Peter Wallace
Mesa Electronics
(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.
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