Re: [CAD_CAM_EDM_DRO] Re: Compters without printer port

You need to look into that. I seem to remember it discussed on the EMC forum
in terms of Linux, and that it's related to interrupts from the power
management.

I may be wrong on the specifics here, but one needs to have a careful look
at all the processes run by XP, and stop/disable all the uneccessary ones.
Also envisage/keep the PC as a dedicated controller, rather than a generic
desktop machine. Ie no other programs. Keep it minimilast for Mach only.

Roland


2010/1/7 Danny Miller <dannym@...>

>
>
> My desktop PC has an on-board LPT port and I disabled the on-board video
> in favor of a card (on-board video is said to be a problem for Mach3).
> Mach3 reported it as "excellent" or whatever for performance... but I
> noted this queer thing where during a G move it would make a "thunk"
> like once a sec, very noticeable in the rotary table. That's due to
> some sort of inconsistency in the pulse train.
>
> I do recommend the SmoothStepper, the performance is better than you'd
> ever get with a parallel port. Especially if you were gonna go out and
> drop a few $ on an LPT card anyways, save that $ and spend it on an SS.
>
> Danny
>
>
> caudlet wrote:
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com<CAD_CAM_EDM_DRO%40yahoogroups.com>,
> "Ronald" <ronaldshaul@...> wrote:
> >
> >> From what I read, the cnc programs utilize the parallel printer port for
> control. Many of the newer computers, especially laptops, do not have this
> port. What do other do to work around this problem?
> >>
> >>
> > 1. Buy a refurbed PC with XP Pro 2.8G processor & 1G ram for $159.00 has
> Printer port and serial port.
> >
> > 2. Buy a new desktop and a PCI add-in (expansion) Parallel Port card for
> about 14.00 bucks
> >
> > 3. Buy a USB CNC driver solution for MACH (about $140.00) aka Smooth
> Stepper by Warp9
> >
> > Laptops are poor choices for CNC controllers unless your intent is to
> setup your CNC machine on the kitchen table each time or make to easily
> portable. The PC that runs a CNC needs to be considered a dedicated
> Controller. It has to be optimized to run the machine. Laptops break easier
> and are more expensive to fix/replace. There are problems with some laptops
> (even with a Smooth Stepper). You may face video or other timing problems
> with MACH on a laptop. About the best PRO for a laptop and CNC is it runs
> off a battery so the Ground is via the system (more noise immune).
> >
> > Check EBAY for good deals on computers that will run MACH and not bust
> your wallet. I have been buying nice HP's and Dells that are refurbished and
> ready to run. I buy 17" LCD monitor for less than 50 bucks. You do not need
> a Dual-Core-whiz-bang computer to run MACH (or EMC2) but it needs to be
> considered part of the machine if you want to be able to just fire it up and
> cut something.
> >
> > TOM Caudle
> > www.CandCNC.com
> > Totally Modular CNC Electronics
> > New low cost All-in-one 5 axis Controller with TubeSlicer (tm)
> Technology.
> >
> >
> >
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