[Ovmsdev] USB port fragility
Chris van der Meijden
chris at arachnon.de
Sat Oct 10 01:26:23 HKT 2020
I ended up ordering a new device today. The old one was totally bricked
...
The device was already competely toast before I started the soldering
attempts. Would not start on 12Volt either.
So now I'm hoping on a fast delivering from Hong Kong so the
development can continue :-)
Greetinx
Chris
Am Mittwoch, den 30.09.2020, 21:33 +0200 schrieb Chris van der Meijden:
> Not my day today ...
> The system was completely gone, so I took the OVMS out of the car.
> Tried carefully to put the USB cable on and bam ...
> For the second time now the connector broke off.
> I will take a forced OVMS break now ...
> Chris
>
> Am Montag, den 10.08.2020, 08:09 +0300 schrieb Jarkko Ruoho:
> > Hi,
> >
> > USB-C would be good for future proofing.
> >
> > Another mechanically lasting option would be fixed cable. It's also
> > very ugly :)
> >
> > In my experience also shaking could be a problem, if you have the
> > USB-cable connected. So maybe Micheal's warning should include also
> > a warning against vehicle usage with USB-cable always connected to
> > the device. Hot glue with good installation (also cable supported
> > near the connector), should last there quite well.
> >
> > I have an electrified lawnmower, where I use Arduino for the blade
> > speed control. Due to blade imbalance there is more shake than in
> > an electric car, but micro-USB connectors broke there in less than
> > one hour. Mini-USB variants lasted longer, but I think that's just
> > a small incremental improvement. Now it works fine, as I have no
> > cable connected during normal operation.
> >
> >
> >
> > ke 5. elok. 2020 klo 18.23 Collin Kidder (collink at kkmfg.com)
> > kirjoitti:
> > > I've had my fair share of USB connector failures over the years.
> > > Actually, that is the reason that all EVTV boards have had USB-B
> > > (the type you see on a printer) ports for years now. The giant
> > > USB-B connector is not likely to break off and hasn't ever done
> > > so for us. I'll bet you probably don't want to switch to such a
> > > huge connector but it solved the problem for us.
> > >
> > > On Tue, Aug 4, 2020 at 2:51 AM Mark Webb-Johnson <mark at webb-johns
> > > on.net> wrote:
> > > > In this batch we tried to address the reported / experienced
> > > > problems:
> > > > USB port dislodged with rough handling - change was to increase
> > > > solder pad area and adjust thermal profile when solderingLarge
> > > > capacitors dislodged during shipment - change was to
> > > > increase solder pad area and adjust thermal profile when
> > > > solderingReports of GPS Antenna non functional (no continuity)
> > > > - change to new (more robust) internal antenna cable
> > > >
> > > > We have also seen #3 seen internally, during random QC checks,
> > > > with the GSM Antenna (although no reports from users).
> > > >
> > > > If you remember, back when v3.2 was released we had to change
> > > > that internal antenna cable (due to ROHS issues with the type
> > > > of plastic used). Since then we have had a number of reported
> > > > issues with GPS reception that were traced back to poor
> > > > contacts or no continuity with these internal antennas
> > > > (particularly the batch late last year). So, we (a) add a QC
> > > > step to check continuity and ‘wiggle’ the antennas to ensure
> > > > they are stable, and (b) change the component to a ROHS
> > > > compatible antenna similar to the previous one we used. The new
> > > > component feels much more solid (particularly when connecting
> > > > to the modem PCB) and so far tests 100% with no QC failures.
> > > >
> > > > Regards, Mark.
> > > >
> > > > > On 4 Aug 2020, at 2:39 PM, Michael Balzer <dexter at expeedo.de>
> > > > > wrote:
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > Great, that looks much more rigid and should solve the
> > > > > issue.
> > > > >
> > > > >
> > > > >
> > > > > What's the reason for / benefit of the thicker antenna
> > > > > cables? Also
> > > > > just rigidity, or do they have an effect on signal
> > > > > strength?
> > > > >
> > > > >
> > > > >
> > > > > Regards,
> > > > >
> > > > > Michael
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > Am 04.08.20 um 03:24 schrieb Mark
> > > > > Webb-Johnson:
> > > > >
> > > > >
> > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > The small solder area is my suspicion too, and a
> > > > > > relatively easy fix. Through hole would be better
> > > > > > but would
> > > > > > require a new component and circuit redesign (with
> > > > > > associated
> > > > > > complexity and re-certification issues). Here are
> > > > > > some pictures
> > > > > > of the 2020-06-15 batch with the changes. But it
> > > > > > will be some
> > > > > > time before distribution stock is cleared out and
> > > > > > those start to
> > > > > > be shipped. Note also that 2020-06-15 also includes
> > > > > > a change to
> > > > > > new thicker antenna cables for both GPS and GSM.
> > > > > >
> > > > > >
> > > > > >
> > > > > > Regards, Mark.
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > > On 4 Aug 2020, at 9:11 AM, Craig Leres <leres
> > > > > > > @xse.com> wrote:
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > On 2020-08-03 01:26, Michael Balzer wrote:
> > > > > > >
> > > > > > >
> > > > > > > > I've had multiple cases
> > > > > > > > now of damaged and broken off USB
> > > > > > > > ports.
> > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > I managed a mechanical "no heat" desolder
> > > > > > > of the usb
> > > > > > > port on one of my modules last year (I
> > > > > > > wasn't careful
> > > > > > > when sliding the seat back with a cable
> > > > > > > plugged in).
> > > > > > > When I took it apart I could see that
> > > > > > > there was not very
> > > > > > > much solder in the four holes that secure
> > > > > > > the usb shell
> > > > > > > to the board. At the time my suspicion
> > > > > > > was that the
> > > > > > > small amount of solder from the factory
> > > > > > > wave solder made
> > > > > > > for a weak bond. I was lucky that I
> > > > > > > didn't lift any pads
> > > > > > > and was able to resolder it.
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > Craig
> > > > > > >
> > > > > > > _________________________________________
> > > > > > > ______
> > > > > > >
> > > > > > > OvmsDev mailing list
> > > > > > >
> > > > > > > OvmsDev at lists.openvehicles.com
> > > > > > >
> > > > > > > http://lists.openvehicles.com/mailman/lis
> > > > > > > tinfo/ovmsdev
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > > --
> > > > > Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
> > > > > Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
> > > > >
> > > > >
> > > > >
> > > > > _______________________________________________
> > > > > OvmsDev mailing list
> > > > > OvmsDev at lists.openvehicles.com
> > > > > http://lists.openvehicles.com/mailman/listinfo/ovmsdev
> > > >
> > > > _______________________________________________
> > > >
> > > > OvmsDev mailing list
> > > >
> > > > OvmsDev at lists.openvehicles.com
> > > >
> > > > http://lists.openvehicles.com/mailman/listinfo/ovmsdev
> > > >
> > > >
> > >
> > > _______________________________________________
> > >
> > > OvmsDev mailing list
> > >
> > > OvmsDev at lists.openvehicles.com
> > >
> > > http://lists.openvehicles.com/mailman/listinfo/ovmsdev
> > >
> > >
> >
> > _______________________________________________
> > OvmsDev mailing list
> > OvmsDev at lists.openvehicles.com
> > http://lists.openvehicles.com/mailman/listinfo/ovmsdev
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openvehicles.com/pipermail/ovmsdev/attachments/20201009/373a8301/attachment-0002.htm>
More information about the OvmsDev
mailing list