Re: [CAD_CAM_EDM_DRO] Print Servers and SBCs for CNC control

For what it may be worth, I have several new Single Board Computers
(SBC's),l complete with PC104 Interface. The boards have plenty of IO
including

3+ serial ports, 2+ parallel ports, onboard VGA and LCD panel support,
Floppy, IDE, and a Compact Flash Slot. I Also have new PC-104 Expansion
cards which add either 8 channels of relay control (using on-board relays)
as well as 48 bits of Digital I/O. (I say 3+ & 2+ because I think that
they may actually have 3 parallel ports and 3 RS-232 + one RS-422. I would
have to open a package and look at the docs to confirm this.)

With the compact flash slot, it would be possible to build a unit with no
moving parts. Oh, I forgot to mention, it also has a built-in 10-Base-T
Port.

From a hardware level, these are all you would need to have the
flexibility to do what you are describing. They make great controllers
for just about anything.

I purchased several of these for a networked robotics project. I only
need to keep two as my project has changed.

If anyone is interested, please feel free to contact me off list

Eric
glee@...


------------------------------------------------------------------------------------------------------





"alex" <telecomt@...>
02/26/2003 06:55 AM
Please respond to CAD_CAM_EDM_DRO

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cc:
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Subject: Re: [CAD_CAM_EDM_DRO] Print Servers for CNC


You know, Bill, for me price point is of a great importance,
so the least expensive I found for $119, q-ty 1, made by www.abiatech.com.
Never tried it, though.
If you look at Circuit Cellar Mag, you'll find numerous companies making
SBCs,
there are getting more and more of them with every issue.
For interfacing I would recommend to read "Build your own universal
computer
interface" by B.Chubb.
Alex

----- Original Message -----
From: <ccq@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, February 25, 2003 9:57 PM
Subject: Re: [CAD_CAM_EDM_DRO] Print Servers for CNC


> As I've never played with one of these, can you suggest the best SBC
board
for
> this, and the least complicated way to go about implementing and
programming it?
>
> Bill
>
> On Tue Feb 25 11:23:31 2003 alex wrote:
>
> >Bill,
> >use SBC as a physical interface. It is in turn connected to a "server"
over
> >the network.
> >I/O card plugged into ISA bus of SBC can generate pulses for a drive.It
also
> >can
> >generate analog signals for a servo, also whole bunch of other signals
for
> >relays
> >and so forth.
> >Server in this case is a controller which does processing of G-codes.
> >Alex
> >----- Original Message -----
> >From: <ccq@...>
> >To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> >Sent: Tuesday, February 25, 2003 2:33 PM
> >Subject: Re: [CAD_CAM_EDM_DRO] Print Servers for CNC
> >
> >
> >> Hi Alex;
> >>
> >> Because you need a physical interface to hook it all up to?
> >>
> >> Bill
> >>
> >> On Tue Feb 25 06:39:31 2003 alex wrote:
> >>
> >> >Why to use print servers when you can add networking app directly
into
> >the
> >> >code?
> >> >Alex
> >> >----- Original Message -----
> >> >From: <ccq@...>
> >> >To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> >> >Sent: Tuesday, February 25, 2003 9:45 AM
> >> >Subject: Re: [CAD_CAM_EDM_DRO] Print Servers for CNC
> >> >
> >> >
> >> >> Howdy Jeff;
> >> >>
> >> >> On Tue Feb 25 05:36:41 2003 Jeff Goldberg wrote:
> >> >> >
> >> >> >I don't think speed will be an issue with a modern print server
as
> >they
> >> >are
> >> >> >generally the same throughput as a PC parallel port. The
problems
may
> >> >arise
> >> >> >from the ability to directly output signals on pins which are
unusual
> >for
> >> >> >printers to use in the same way. Don't forget, they are not
directly
> >> >> >coupled to your PC, so any fooling around that the programmer
does
> >with
> >> >the
> >> >> >innards of your PC to generate or read signals may not work on a
print
> >> >> >server.
> >> >> >
> >> >> >Also, Ethernet works on a collision based retransmission basis.
On
a
> >> >small
> >> >> >network this probably wouldn't cause a problem, but on a network
with
> >> >lots
> >> >> >of traffic flowing, your data may be slightly delayed in reaching
the
> >> >print
> >> >> >server which might cause issues.
> >> >>
> >> >> You're thinking of using this on a hub vs. a switch here, yes?
There
> >are
> >> >single
> >> >> ether/parport units available, but I think that would tend to add
delay
> >> >time,
> >> >> which is why I was thinking about a single NIC to triple parport
> >solution.
> >> >>
> >> >> >I'd tend to suggest sticking to popular name brands because
driver
> >> >> >availability might be an issue if you change operating systems in
the
> >> >future
> >> >> >(unless the price difference is too great, and you get involved
up
> >front
> >> >> >with the assumption that it may end up as a paperweight sometime
in
> >the
> >> >> >future)
> >> >> >Theoretically, they should work, from a practical standpoint,
you'd
> >have
> >> >to
> >> >> >try it.
> >> >> >
> >> >> >Jeff
> >> >>
> >> >> Near as I can tell, the popular name brands only put out single
port
> >> >units,
> >> >> but I don't have any comprehensive list to look at.
> >> >>
> >> >> Bill
> >> >>
> >> >> >-----Original Message-----
> >> >> >From: ccq@... [mailto:ccq@...]
> >> >> >Sent: Tuesday, February 25, 2003 7:28 AM
> >> >> >To: 2ccq@...
> >> >> >Subject: [CAD_CAM_EDM_DRO] Print Servers for CNC
> >> >> >
> >> >> >
> >> >> >The following URLs have a print server on them; That's a 10/100
> >> >ethernet
> >> >> >port feeding three parallel ports. Would these be usable for CNC
> >work?
> >> >> >Would the software be able to access them properly? I would
think
> >they'd
> >> >be
> >> >> >speedy enough for smaller, slower machines, but.....
> >> >> >
> >> >> > http://www.pcbay.net/gen3parpor10.html
> >> >> > http://www.amastore.com/gen3porparpr.html
> >> >> >
> >> >> >Bill
> >>
> >> --
>
>>
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> >--
> >> RKBA! ***** Blessings On THee, Oh Israel! *****
> >4-19!
>
>>
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> >> An _EFFECTIVE_ | Insured | All matter is vibration. | Let he who
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no
> >> weapon in every | by COLT; | -- Max Planck | weapon sell
his
> >> hand = Freedom | DIAL | In the beginning was the | garment and
buy
a
> >> on every side! | 1911-A1. | word. -- The Bible | sword.--Jesus
> >Christ
>
>>
----------------+----------+--------------------------+------------------
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> >--
> >>
> >> Constitutional Government is dead, LONG LIVE THE
CONSTITUTION!!!!!
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>
>>
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OT
subjects, that are not allowed on the CCED list.
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THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
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> --
>
--------------------------------------------------------------------------
--
> RKBA! ***** Blessings On THee, Oh Israel! *****
4-19!
>
----------------+----------+--------------------------+-------------------
--
> An _EFFECTIVE_ | Insured | All matter is vibration. | Let he who hath
no
> weapon in every | by COLT; | -- Max Planck | weapon sell his
> hand = Freedom | DIAL | In the beginning was the | garment and buy
a
> on every side! | 1911-A1. | word. -- The Bible | sword.--Jesus
Christ
>
----------------+----------+--------------------------+-------------------
--
>
> Constitutional Government is dead, LONG LIVE THE CONSTITUTION!!!!!
>
>
--------------------------------------------------------------------------
--
>
> Addresses:
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>
> OFF Topic POSTS: General Machining
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if
you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
sister site to the CCED group, as many of the same members are there, for
OT
subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> bill
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>
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>



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OFF Topic POSTS: General Machining
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if you have trouble.
http://www.metalworking.com/news_servers.html

http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
sister site to the CCED group, as many of the same members are there, for
OT subjects, that are not allowed on the CCED list.

NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
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