FH-2: FHX-8GT --> losing contact to FH-2 (solved/USB Hub based)

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Funky40
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FH-2: FHX-8GT --> losing contact to FH-2 (solved/USB Hub based)

Post by Funky40 » Fri Jan 24, 2020 7:55 am

edit: the header + this:
JFYI: the problem was based on my active USB HUB. taking the hub out solved all problems.
but the whole FH-2 setup was working fine with the hub for 3months or so.
........not yet solved is the problem with the hub as such, ......since i want/need to use one

----------------------------------


Hello os,
my problem:

my FHX-8GT is losing contact to the FH-2.
Have you ever heard of such problems ?
i ask since i could not swear that the problem is not caused by the cabling or so......but it should not since power cycling solves the problem for a few minutes.
Also please note: the FHX-8GT sits on another PSU ( same type, same skiff / details below)
edit: see 2nd post please




details:
Fact is: this setup was running flawlessly over some months,
then the problem begun some 6-7 weeks back or so:
the FHX-8GT losing contact to the FH-2........when i power cycle the Fh-2 is the contact coming back.
also: my FHX-8GT sits on another PSU then the FH-2. ( all modules sit in my skiff, 2 rows, PSU per Row: 4ms RowPower 30)
also: it could be that i often started the power on the FH-2 bevore the FHX-8GT. I changed that habit now: allways starting the power of the -8Gt first.

also: i checked the cabling ( i have no good access to the underside since the system is allways used and patched.......;) )
i don´t know how, but the connection was working again good for the last 2 weeks or so.
Now its again broke
= i lose again and again the contact between the FH-2 and the -8GT ( which is used for main clock and reset duties ! )
If cabling were bad would i have no connection at all would i guess ?
when i powercycle the Fh-2 is it working again for a few minutes.....until it loses contact again



the whole setup is:
i have the FH-2 plus something like 5x FHX-8CV,
plus FHX-8GT plus EHX-8GT ( again: the -8GT on another PSU )
plus the midi expander.
( not underpowered PSU wise )
( ahh, and i never switch presets or so on the FH-2. it runns allways just with my start up preset since months )
( the stock "interconnection cables" were shortened, so one end was made by me on most cables, if not both ends )

what do you think ?

if such problem is new to you would i guess that i have to renew the cabling.
( out of sockets now / and the whole installation was a mess )
Last edited by Funky40 on Thu Feb 13, 2020 12:17 pm, edited 3 times in total.
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Re: FH-2: FHX-8GT ----> losing contact to FH-2

Post by os » Fri Jan 24, 2020 7:58 am

I would recommend you put the modules on the same power supply and see how that affects things.

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Re: FH-2: FHX-8GT ----> losing contact to FH-2

Post by Funky40 » Fri Jan 24, 2020 8:25 am

ahhh wait:
when the FHX-8GT loses the contact, is the EHX-8GT still working. (allways)

so, its very unlikely that the cabling has anything to do with this problem, would i suspect.
Since the EHX-8GT is connected directly to the FHX-8GT


further infos:
the workload for the FH-2 is not that high as the number of expanders might suggest it was.
All the CVs running (not gates) are usually something between 6 and 16 to give a number.
The FHX-8GT itself sends: 6x clock, plus start and reset.
The EHX-8GT has usually 2-4 gates going

ahh, and another thing:
i run TWO Digitakts over a USB hub ( active) into the FH-2.
But the clock out of one is off. allways.
so the FH-2 gets only one incoming clock.

edit: and again: restarting the FH-2 solves the problem ! ( plus restarting the midi sequenzers so that a start signal occours)
For sale / reduced prices ( swiss (we are NON-EU)/ in case it makes sense_ EU/WW)(CHF +- = $):
WMD Geiger Counter: 180.- / Dotcom Q960: 700.- / Q119: 430 /
ATV A-Frame incl. Accu and Bag: 850.-, like new, quasi unused.

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Re: FH-2: FHX-8GT ----> losing contact to FH-2

Post by Funky40 » Fri Jan 24, 2020 8:30 am

os wrote:
Fri Jan 24, 2020 7:58 am
I would recommend you put the modules on the same power supply and see how that affects things.
ahh, missed the info, bevore doing my second post.


the bus oard has no free connectors there.
ok, it might work out with some long PSU cables.


ok, i try this and come back here.......
need first to order the parts from reichelt, since i´m out of connectors.

Thanks !
For sale / reduced prices ( swiss (we are NON-EU)/ in case it makes sense_ EU/WW)(CHF +- = $):
WMD Geiger Counter: 180.- / Dotcom Q960: 700.- / Q119: 430 /
ATV A-Frame incl. Accu and Bag: 850.-, like new, quasi unused.

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Re: FH-2: FHX-8GT ----> losing contact to FH-2

Post by Funky40 » Sat Jan 25, 2020 6:38 am

os wrote:
Fri Jan 24, 2020 7:58 am
I would recommend you put the modules on the same power supply and see how that affects things.
os, i managed to connect the FHX-8GT to the same PSU as the FH-2.
---> The Problem remains. The FHX-8GT is still losing contact, while the EHX-8GT is still working.
Power cycling it, (and starting then the midisequenzer new**) solves the problem......until it happens again
( **since the FHX8GT has only clocks to send out)


i´m on FW 1.72 me thinks.
next step: i update (later when i´m back) to the newest and see what happens.
For sale / reduced prices ( swiss (we are NON-EU)/ in case it makes sense_ EU/WW)(CHF +- = $):
WMD Geiger Counter: 180.- / Dotcom Q960: 700.- / Q119: 430 /
ATV A-Frame incl. Accu and Bag: 850.-, like new, quasi unused.

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Re: FH-2: FHX-8GT ----> losing contact to FH-2

Post by Funky40 » Tue Jan 28, 2020 11:18 am

feedback:

Funky40 wrote:
Sat Jan 25, 2020 6:38 am
i´m on FW 1.72 me thinks.
next step: i update (later when i´m back) to the newest and see what happens.
ok, i´ve updated two-three Days ago to FW 1.81 (latest)
I had several jamms in the meantime.

The first was good, no "lost contact" case.
Then two jamms with "lost contact".
then two jamms again good, no "lost contact".


right now is my modular on quite long, and its still all fine.
Would be interesting to hear back in case you had an idea what could cause the problem, os ?
its somewhat strange.


possible factors:
heat ? ( i have a 4ms rowpower 30 directly beside the FH-2)
PSU overload ......i am fine, checked on modulargrid
For sale / reduced prices ( swiss (we are NON-EU)/ in case it makes sense_ EU/WW)(CHF +- = $):
WMD Geiger Counter: 180.- / Dotcom Q960: 700.- / Q119: 430 /
ATV A-Frame incl. Accu and Bag: 850.-, like new, quasi unused.

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Re: FH-2: FHX-8GT ----> losing contact to FH-2

Post by os » Wed Jan 29, 2020 3:43 am

Could it be a wobbly USB connection at the FH-2 end?

Is it better or worse if you reverse the USB C connector?

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Re: FH-2: FHX-8GT ----> losing contact to FH-2

Post by Funky40 » Sun Feb 02, 2020 11:09 am

os wrote:
Wed Jan 29, 2020 3:43 am
Could it be a wobbly USB connection at the FH-2 end?

Is it better or worse if you reverse the USB C connector?
Ino longer had any problems.
it worked fine on any jam this week !
so it might have been this.

( will edit the theradtitel now )


MUCH Thanks for taking care, os !
For sale / reduced prices ( swiss (we are NON-EU)/ in case it makes sense_ EU/WW)(CHF +- = $):
WMD Geiger Counter: 180.- / Dotcom Q960: 700.- / Q119: 430 /
ATV A-Frame incl. Accu and Bag: 850.-, like new, quasi unused.

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Re: FH-2: FHX-8GT --> losing contact to FH-2 (solved!)

Post by Funky40 » Thu Feb 13, 2020 12:13 pm

some feedback for os:

ok, i had the problems then again.........
it turned out, at least it seemed, that the problem comes from the USB connection ..........( as suggested as a option from you)


then i took my second FH-2 (which is still not really incorporated into my setup) and replaced the old FH-2 with the new FH-2.
The problem remained.
Finally i could then track the problem down to my active USB hub which i use in front of the FH-2.

I had two DTs connected to that USB Hub, both sequenzing the same FH-2. (only one sending clock)
this setup worked over a few month ( 3 month or so).



The strange thing is that allways only the FHX-8GT expander failed ( not working) while the EHX-8GT connected to it was allways working,
and also all other FHX-8CV expanders.

Since i took the USB Hub out, have i not had any problems again !
( but: i need to have a USB HUB..........i might open a own topic on that subject)


When i had the problem, could i get the failing FHX-8GT back to work by disconnecting the USB cable from the main DT which sends the clock
( the FHX-8GT is only sending clocks and start/restarts out).
i could in fact disconnect and reconnect the USB cable on the USB Hub or on the FH-2 itself.
ususally i got the FHX-8GT back to work by reconnecting the usb connection.
It was as would the reconnection "initialise" something.
which would also suggest that my problem was not based on any weak cables.

the whole thing seems strange, but the (active) USB hub has definitly something to do with it.
( sorry, i´m not good in keeping it short)
For sale / reduced prices ( swiss (we are NON-EU)/ in case it makes sense_ EU/WW)(CHF +- = $):
WMD Geiger Counter: 180.- / Dotcom Q960: 700.- / Q119: 430 /
ATV A-Frame incl. Accu and Bag: 850.-, like new, quasi unused.

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