FireWire device burning

[Ларионов Д. <lar...@ya...>]

Hello Stefan.

You seem to know a lot about IEEE1394 hardware, not only software. Could you please tell me whether it is possible to burn a FireWire device by not connecting its housing to the host's?
I have a ScanControl surface analyzer from MicroEpsilon. It is essentially a DCAM camera with IEEE1394 interface.
I soldered my own cable, because I needed a special one (not fracturing at extremely low temperatures etc.) Since the scanner has a separate power port, I soldered only 4 wires (TPA+, TPB+, TPA-, TPB-).
I also connected the connector ground to the cable shield at only one end of the wire. I asked the manufacturer employee and he said that's ok.
The scanner worked fine for a while, but then it just suddenly broke. I sent it back to the manufacturer and they sent me these photos:

https://yadi.sk/d/nlIi62iXf9dEE

and recommended to buy their own cable. I did that, and it seems that the only difference between my cable and theirs (besides the absence of power wires) was that the shield was connected to the connectors at both ends.
Did you have similar cases in your experience?
Thanks in advance.
-- 
Даниил Ларионов



09.04.2015, 21:45, "Stefan Richter" <st...@s5...>:
> On Apr 09 Elias Aarnio wrote:
>>  02.03.2015, 22:25, Stefan Richter kirjoitti:
>>>  You however get a never ending series of bus resets.  These could be
>>>  caused by a hardware defect --- e.g. burnt out port or loose port at the
>>>  camcorder; worn out plug at the cable or broken wire or bad shielding of
>>>  the cable; worn out or desoldered port at the card; etc..
>>  This was the reason. The cable was damaged so that in some positions it
>>  stopped working.
>
> For this reason I like the following cables with mere 3 mm outer diameter,
> hence less weight and stiffness pulling on the plug:
> http://www.partsdata.co.uk/firewire-cables-ieee-1394-accessories/firewire-400-cables-adapters/firewire-cable-46-white-flexible/
> (This vendor is based in Germany.  Shipping costs to Scandinavia seem to be
> quite high if all you need is just one cable.)
>
> Sony, who originally came up with the 4-pin plug, used to make cables
> which were almost as thin but even more flexible.  Maybe you can find a
> used Sony cable for cheap.
>
> About half a year ago I got 4 mm thin and still quite flexible cables via
> this page:  http://www.amazon.de/gp/product/B00L8ZRQ0S
> But one can never be sure what cable material one gets when buying noname.
> The cables which I received from there have a different mold of the plug
> casings than the cable on the amazon photo.
> --
> Stefan Richter
> -=====-===== -=-- -=--=
> http://arcgraph.de/sr/
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