Re: [CAD_CAM_EDM_DRO] USB instead of Parallel Port drivers

hello;

in looking further at my notes concerning firewire/ieee-1394
firewire has the ability to be use both isochronous and
ansynchronous.

ieee-1394 has a top limit of 1.2 gigabits/sec. it is also
isochronous and asynchronous.

ieee-1384b has the following improvements over ieee-1394/ieee-1394a:
1394b is an enhancement to the basic 1394 specification that
enables speed increases to 3.2 Gigabits/sec, supports distances
of 100 meters on UTP-5, plastic optical fibre and glass optical
fibre, and significantly reduces latency times by using
arbitration pipelining.

being able to multi-mode glass optical fibre is a good advantage.
being able to have cabling runs of 100 meters is yet another good
advantage.

i am unable to find my notes on usb 1.0 or usb 2.0 so i can not
give you any information concerning changes between usb 1.0 and
usb 2.0.

personally i would go with firewire/ieee-1394b and multi-mode
glass optical fibre.

On Mon, 24 Dec 2001, Lee and Amy Wenger wrote:

lee> All,
lee>
lee> For all you electrical engineer types out there has anyone
lee> examined using either firewire or USB for stepper control?
lee> It seems infinitely more expandable than PP but not being
lee> very electronic savy, I'm not sure how complicated it would be...
lee>
lee> Can anyone who has bought long (>4') acme or ball screws give
lee> me some ideas on how expensive these beasts are?
lee>
lee> thx,
lee>
lee> Lee Wenger
lee>
lee>

--
Terry L. Ridder

digging deep, i feel my conscience burn
i need to know who and what i am
this hunger jolts me from complacency
rocks me, makes me meet myself
----kendall payne---closer to myself---