Re: [CAD_CAM_EDM_DRO] Re: USB ports ?

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
>>>
>>>
>>>
>>>
>>>
>>>
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>>
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> 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........
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