Second try sending this, it seems it did not work the
first time. I added a little more this time around.
Comments mixed in.
--- Jim Fleig - CNC Services <jim@...>
> Hi Gene,
> Thank you for replying.
> My goal in selecting a computer system is as
> - install Ubuntu and EMC2
> - install a word processor that would be used to
> edit G-code programs at the
This should come with Ubuntu.
> - install a spreadsheet to use for the calculations
> of speeds and feeds
This should come with Ubuntu.
> - install a motion control card(I have a Servo To
> - install whatever other plug in boards may be
Unless you need sound, I'd remove or not install a
sound card; in general they are more troublesome than
other kinds of cards and COULD interfere. If it's
onboard it won't matter.
> - dedicate the computer to one machine (a vertical
> mill with 4 axes
> - have internet connection through network to do
> - data stored on computer would be limited to the
> program currently running
> and process sheets for the program that is currently
> running (additional
> programs and process sheets would be stored on the
> After a considerable amount of looking, I thought
> the computers listed below
> would meet the requirements above. However, if the
> computers listed below
> will only be useful as cheap cases then what advice
> would you offer with
> respect to the following questions:
> What are the minimum recommendations for a computer
> to accomplish the
> objectives above?
> Power supply wattage
Shouldn't matter, whatever's installed will be enough
as long as you get something name brand.
> Motherboard style (ATX?, some other style)
Does not matter; you are very unlikely to find
anything other than ATX - even if you do it will work.
500-800 MHz should be good.
> CD speed
Speed doesn't matter, only needed to install OS. Any
computer with the above processor speed will have a
cd-drive new enough to boot from, though you may need
to enable boot-from-cd in the bios.
> PCI slots, #
> ISA slots, #
> Any system brands or types that should be avoided?
On-board graphics can cause problems. If you look at
the back of the case, the 15-pin connector should be
in one of the slots, rather than in the cluster of
connectors that are built into the motherboard.
You can buy a separate card and disable the onboard
vga, but many systems with it onboard won't have an
AGP slot so you'll have to settle for PCI. A PCI card
will be fine for EMC, though the screen will redraw
slightly more slowly.
> Minimum ballpark budget to get a system that will
> work well for 1 - 2 years?
I'd say $70 or less (based on an earlier message that
referenced some website)
> Should used systems be avoided?
Shouldn't cause any problems - in fact, you will have
a HARD time finding a new system with ISA slots.
The thing that fails most often is a cooling fan -
especially the one on the processor heatsink. Buy a
whole new heatsink and fan *and thermal grease* when
it starts buzzing, or measure the fan and get a new
ball-bearing fan from a place like Digikey.
> What would be the succession of add ons for better
I am not a fan of add-ons, personally. The cost of
new components that will work with a several-year-old
system is too high for me. If you find used stuff the
price probably isn't so bad.
> Any economical sources of the above systems?
> I was interested in the computers listed below
> because they seemed to be a
> value considering the price and capability. I am not
> adverse to spending
> more on a computer. If I am going to spend more, I
> would like to know what
> I am buying and why. Right now I am guessing. If I
> guess incorrectly, I'd
> like to minimize my losses.
> Thanks again for replying.
> I look forward to your next reply and anyone else's
Hope this helps
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