Hi,
I’ve finished my Mbox Plus yesterday and nearly everything works - but not the Pots.
I’ve connected 6 faders , 6 Pots (The Foot-controller, the Ribbon-controller and the XY-Pad will be added in the future).
The Faders work properly, the Bars for the not-connected Controller jitter, but the
Pots jitter too.
I’ve controlled the wiring about 3 times and I can’t see any error.
If I pull all the Faders down, the Pots stop jittering.
weird :-\
What could be the reason for this?
slp
Have you followed the troubleshooting steps in the wiki? What were your results?
I’ve read the MIDI-Troubleshooting page, but it doesn’t seem to be a MIDI-problem.
I haven’t connected the Box to the PC yet.
the Bars for the not-connected Controller jitter
Ground anything “not-connected” and see if anything changes
Best
Smash
No. I’ve connectet the unsused AINs to ground, and it seemed to work, but now it doesn’t recieve any Signals from the pots. 
Perhaps this can help you:
AIN 1-6 Faders
AIN 7-10 unused / Gnd
AIN 11-16 Pots
…if I connect a certain AIN to gnd, the pots jitter less, but the Midi-out-led is still binking very fast…
If you ground all the pins except for one pot or fader, does it work OK?
AIN 1-6 Faders
AIN 7-10 unused / Gnd
AIN 11-16 Pots
what about AIN 17-32 (or more precise 16-31) and the pins for the second AINX-module?
Grounded these?
If any bar of an unconnected pin is flickering, it is very likely to stray it’s jitter to it’s neighboured pins.
I’m using a MBox plus. 2 multiplexers > 16 AINs
I can’t use more ains, but 16 are enough for me.
If I pull the faders 4-6 down, I can use 1-3 without anything jittering…
but I don’t get any signal from the pots and the unused ains
If you ground all the pins except for one pot or fader, does it work OK?
I’m going to try this the next days.
I wanted to try it today, but somehow the gnd-socket of the old, rusty power supply my neighbor gave me is not what it’s supposed to be. I don’t know exactly what it is, but it hurts ! ;D
no.
If I gnd everything but the 6 faders there’s still some jittering.
should I use shielded cables for the signal-wires?
just try grounding ALL except ONE (just to see if that’s the reason; no need to solder, just do it temporarily) -
You already wrote that:
If I pull all the Faders down, the Pots stop jittering.
So it’s likely the problem lies within the faders and / or neigboured AINs.
What faders do you use? 10k linear? Have you measured the wiring with a Multimeter (Ohm Resistance should grow and shrink when the fader is moved, when you connect the multimeter to the AIN-pin and AIN-GND.
regards,
Michael
I’m going to try this, when I’ve repaired my “killa-work-bench”
:o woa, man
take care, you 
Ok. I’ve grounded every input except from one.
now every input is jittering around 31.
the input which is connected to a fader doesnt work either.
:-\
This is a typical reaction of ungrounded AIN-pins. If you leave let’s say all 8 inputs ungrounded and put a signal on one of them, all eight show an input signal.
You have to check again all your connections, there has to be a soldering error or wiring fault somewhere!
Can you check your connections with a Multimeter? I bet the pins are not grounded and there’s a signal coming in on one of them…
I think I’ll remove all wires and replace them by longer ones so It’s all a bit more tidied up
oh, I love such kind of problems.
I’ve replaced the wires by longer ones to get a better overview and replaces the SIL-headers by sockets and soldered the plugs to the cable-ends to be able to change the AIN-connections without soldering.
…and it works!
don’t know how i’ve managed to make it work, but it works.
thank you all for your support anyway.
Now i’ll finish my “beer-controller” and if everything works I’ll be the happiest man in the world.