The Mac mini's are very tempting. Duo 2 core. 1.8 GHz .  Runs OSX  
( BSD unix ) with an Apple replacement of X on top.
AFIK X the proper compile of X runs just fine. The only problem is  
the lack of EMC compatible I/O. The mini's have USB, Ethernet, and  
Firewire.  The really nice thing is the package ... about the size of  
6 CD cases stacked.

I have no data on how well it runs with a linux/rt kernel.   Anybody  
have any data?

Dave



On Sep 9, 2007, at 6:28 PM, Ray Henry wrote:

>
> Dan Falck was running several machines at the same time from a Mac  
> Cube
> in the late 1990s.  Run each machine's EMC headless and make an NML
> socket to whatever machine you want to use to run it.  We demonstrated
> that it could be done from a MS-OS at the NAMES show in about 2000 or
> 2001.  I was running a box 200 miles away the other day using an  
> Xterm.
> No need for anything special and I think Mac can handle Xterm about as
> well as Linux.
>
> At the price of PC's these days you can probably get this sort of  
> setup
> for less than the base price of a G100.
>
> Rayh
>
>
>
> On Sun, 2007-09-09 at 15:59 -0700, Alan Condit wrote:
>> Jon,
>>> Jon wrote:
>>> Why do you want the G100?  There are a number of cheaper, more
>>> capable interfaces to step/direction drives that give you a
>>> number of advanced features the G100 still lacks.  For instance,
>>> my Universal Stepper Controller :
>>>
>>> http://jelinux.pico-systems.com/univstep.html
>>>
>>> It is only $250, and it allows you to connect encoders so you
>>> can detect actual position at all times, even when you crash or
>>> hit E-stop, it also has opto-isolators for 16 digital inputs and
>>> positions to plug in 8 solid state relays for spindle, coolant,
>>> etc.  Finally, it supports spindle sync for lathe threading and
>>> rigid tapping.
>>>
>>> As far as I know, no one is working on interfacing the G-100 to EMC.
>>>
>>> Jon
>>
>> Some of us are still hoping someday to not have to use a parallel
>> port to communicate with the CNC machine. I personally am hoping
>> someday to be able to control EMC2 from my Mac (read no parallel
>> ports). USB or ethernet look like the most likely prospects. The
>> solution may be to use something like G100 or ARC100 at the machine
>> and axis running remote but, we can always dream that someone will
>> find a solution to allow EMC2 to operate over USB or ethernet.
>>
>> Alan
>>
>> ---
>>
>> Alan Condit
>> 1085 Tierra Ct.
>> Woodburn, OR 97071
>>
>> Email -- [EMAIL PROTECTED]
>> Home-Office (503) 982-0906
>>
>>
>>
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