Re: USB ports ?

I'm happy I'm finally back on it again. It's been 1 year and 12 days.
The time elapsed was spent designing the G204V Vampire drive; that
design was finally "put to bed" Wednesday.

We had a little party here Wednesday nite when the gerber files were
e-mailed to the board fabricators. In 2 weeks we get the first 1,000
board-sets and then the real fun begins.

In the meantime I've been killing time writing the G204V user's
manual and generating 3D renderings of the solids model.

Also I've been catching up with where I left off on the G2002,
cleaning up the schematic diagrams to get them spiffed-up enough to
code into an FPGA. That is done and the coding has begun.

The G2002 should progress very rapidly. I did a time chart for the
project; I'm shooting for a 4-month time frame to first article.

An exciting prospect is the "unstallable stepper" idea the G2002
should make possible. A true closed-loop, real time encoder feedback
stepper system.

This coming year will be exciting.

Mariss


--- In CAD_CAM_EDM_DRO@yahoogroups.com, Peter Homann <groups@h...>
wrote:

> Mariss,
>
> I should have realised you had it covered. :-)
>
> Peter.
>
> Mariss Freimanis wrote:
>
> >
> > Peter,
> >
> > Not a problem, 100mA is current to spare. The 100mA outputs are

open-

> > drain and diode clamped to the 24VDC power supply of your choice.

You

> > supply the 24VDC to run your relays or whatever, that is not

taken

> > from the USB 5VDC.
> >
> > Mariss
> >
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, Peter Homann

<groups@h...>

> > wrote:
> >
> >>Hi Mariss,
> >>
> >>You will need to add an alternative power source, such as a wall
> >
> > adapter
> >
> >>or other power supply. The USB specification imposes limits on
> >
> > current
> >
> >>draw. The host first recognizes any peripheral as a low-power
> >
> > device,
> >
> >>which is limited to less than 100 mA of current. The peripheral

can

> >
> > ask
> >
> >>the host to recognize it as a high-power device through a process
> >
> > called
> >
> >>enumeration. Once enumeration is complete and permission is
> >
> > granted, the
> >
> >>peripheral current limitation increases to 500 mA.
> >>
> >>Even 500mA is not enough for 16 outputs at 100mA each, let alone
> >
> > the
> >
> >>other power requirements of the G2002.
> >>
> >>Cheers,
> >>
> >>Peter.
> >>
> >>Mariss Freimanis wrote:
> >>
> >>>Hi,
> >>>
> >>>The G204V "Vampire" drive design is finished. The first 100 beta
> >>>units will be available at the beginning of January.
> >>>
> >>>That means I'm back on the G2002 (G2005?) project. The FPGA for
> >
> > the
> >
> >>>design is being coded right now. In summary, the G2002 will have:
> >>>
> >>>1) 6 axis of step / direction (up to 4 MHz step rate)
> >>>2) 6 axies of encoder feedback (CH-A, CH-B, Index and Fault)
> >>>3) 8 analog output channels (+/-10V, 0-5V)
> >>>4) 8 analog input channels (0-5V)
> >>>5) 16 general purpose outputs (5-24VDC, 100mA)
> >>>6) 16 general purpose inputs (+/- 100V protected)
> >>>7) USB interface, USB powered
> >>>
> >>>Mariss
> >>>
> >>>
> >>>
> >>>--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...>
> >
> > wrote:
> >
> >>>>R Rogers wrote:
> >>>>
> >>>>
> >>>>
> >>>>>Wasn't Art Fenerty working on a system like this for Mach2? He
> >>>
> >>>referred to it as a "cube" or something like that? Basically a
> >
> > remote
> >
> >>>pulse generator. However, I understood it was to work from the
> >>>parallel port. Maybe he already released it and I'm unaware of
> >
> > it.
> >
> >>>>>
> >>>>Yes, hardware by Mariss Freimanis of Gecko Drives, called the
> >>>
> >>>G2002, I
> >>>
> >>>
> >>>>think. There is a group
> >>>>of people working on it. It runs through the USB, I believe.
> >>>>
> >>>>Jon
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>Addresses:
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[Moderators]

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> >
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it if you have trouble.

> > http://www.metalworking.com/news_servers.html
> >
> > http://groups.yahoo.com/group/jobshophomeshop I consider this

to be a sister site to the CCED group, as many of the same members
are there, for OT subjects, that are not allowed on the CCED list.

> >
> > NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY

POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO
EXCEPTIONS........

> > bill
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> --
> ------------------------------------------------------------------
> Web: www.homanndesigns.com
> email: homann@h...
> Phone: +61 421 601 665
> www.homanndesigns.com/DigiSpeedDeal.html - DC Spindle control
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