Re: [CAD_CAM_EDM_DRO] Print Servers for CNC

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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