On Friday 21 November 2008, Jon Elson wrote:
>John Thornton wrote:
>> I assume you want to install EMC on a computer without an internet
>> connection...
>>
>> You will need an internet connection somewhere to download the software
>> after that you don't.
>
>Yes, if he has an internet connection to write the email, then it may
>well be easiest to drag the computer used for CNC control to where his
>internet is available, hook it up, install the update and then drag back
>to the shop.  You don't have to have the computer connected to the CNC
>machine to load and install the software or update.  On the other hand,
>network cable is cheap, and even the hardware to ship network
>connections modest distances (like to an outbuilding) is not that
>expensive.  I wouldn't want to be without the network to ship G-code
>files around.
>
I wouldn't either, so I strung a 100+ foot hunk of cat5, with about 40 feet of 
it swinging in the wind from a corner of my back porch to the other anchor at 
the peak on my 12x16 foot shop building in the upper corner of my back yard, 
figuring the weather would eat it in a year.  Its been swinging in the wind, 
and has required one pullup due to slippage in my anchoring or wire stretch 
in 5 years now and it still does this:

[EMAIL PROTECTED] share]# ping shop
PING shop.coyote.den (192.168.71.4) 56(84) bytes of data.
64 bytes from shop.coyote.den (192.168.71.4): icmp_seq=1 ttl=64 time=0.944 ms
64 bytes from shop.coyote.den (192.168.71.4): icmp_seq=2 ttl=64 time=0.144 ms
64 bytes from shop.coyote.den (192.168.71.4): icmp_seq=3 ttl=64 time=0.135 ms
64 bytes from shop.coyote.den (192.168.71.4): icmp_seq=4 ttl=64 time=0.141 ms
64 bytes from shop.coyote.den (192.168.71.4): icmp_seq=5 ttl=64 time=0.134 ms
64 bytes from shop.coyote.den (192.168.71.4): icmp_seq=6 ttl=64 time=0.103 ms

If that cable dies yet today(its snowing and blowing right now), it doesn't 
owe me a thing!

Cat5 is cheap in bulk, as are connectors.  There is a bit of black art in 
installing the connectors, and you'll need to borrow a crimping tool. I 
already had an 8 port switch downstream of my router, so no expense there to 
speak of.

>Jon
>
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-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
<rcw> liiwi: printk("CPU0 on fire\n");

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