Re: [CAD_CAM_EDM_DRO] USB options ...

Lester


As long as parallel printer port cards are available, then use LinuxCNC. The big advantage is it does not use windows operating systems. The user base is wide and responsive. The starting point is to find a motherboard with low latency so you get the fastest response possible. More I/O just add a £3 parallel printer card. Servo motor, do it in firmware or add a proprietary external board. The HAL, (hardware application level instructions) are script like. A set up wizard gets you started. Add a couple of lines and you have PWM motor control, a few more and its closed loop three term feed forward control. A few more and the spindle is synced to the axis. The document reference page is <http://linuxcnc.org/docs/html/>
If you have an old desktop PC with a parallel port, download the CD rom and give it a try.
It does take some getting used to as you tend to mix up the commands with windoze functions.


Malcolm


I don't suffer from insanity I enjoy it!

Mene, mene, tekel, upharsin
The writing is on the wall.
Ha-ktovet al ha-kir


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On Wed, 6/18/14, Lester Caine lester@... [CAD_CAM_EDM_DRO] <CAD_CAM_EDM_DRO@yahoogroups.com> wrote:


Subject: [CAD_CAM_EDM_DRO] USB options ...
To: CAD_CAM_EDM_DRO@yahoogroups.com
Date: Wednesday, June 18, 2014, 11:00 AM

What is the current consensus on the
various USB motion control options?
While I've not had any problem with parallel port via Mach3,
the move to
64bit versions of windows block that path, and while the ITX
boxes I've
been using will run later versions of 32 bit windows, XP
was/is still
the best base for non-net connected systems?

I'd been seriously considering a USB option, but it seems a
number of
these are now being phased out because of 'the
susceptibility of the USB
port to interference'. It seems that Ethernet is now the
preferred
channel to a co-processor motion control system?

The CNCUSB board I've been running from a recycled laptop
seems to work
without any problem and I was about to roll that out on the
Taig Mills
I've just had delivered, but the board is no longer
available.

Is now the time to make a concerted effort and move to
LinuxCNC or cough
up the extra for an Ethernet option?

--
Lester Caine - G8HFL
-----------------------------
Contact - http://lsces.co.uk/wiki/?page=contact
L.S.Caine Electronic Services - http://lsces.co.uk
EnquirySolve - http://enquirysolve.com/
Model Engineers Digital Workshop - http://medw.co.uk
Rainbow Digital Media - http://rainbowdigitalmedia.co.uk


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Posted by: Lester Caine <lester@...>
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