VCI-100 se BASS VIBRATION Pitch bend problem solution.

[johndow]

Ever noticed: if you are in a heavy bass surrounding your VCI goes wild on the pitch bend midi command due to the vibrations pounding on your jog-wheels?

Who wants to try this:
-Take your VCI apart and disconnect the jog wheels.
-Disassemble the jog wheel.
-You will find an optical port with a very thin disk with a lot of very small holes on the outer edge rotating through it. The disk is that thin so it is able to vibrate on heavy bass impact. If it vibrates it causes focusing issues on the sensor, resulting detecting "motion" and sending out the pitchbend midi command.

-Our problems might be solved by stabilizing the disk, and make it a lot stiffer by glue something to the surface of the disc. Think of a washer, cardboard, plastic or just (hot)glue... Go wild and let me know your results.
You might end up with a f***** up VCI and a need to order spare parts.

Let me know.

Success.
John.

[JesC]

this has been something we noticed since the vci-100 was introduced back in 2008. The best thing to do is have some type of padding below the vci or turn off the jog wheels.

[johndow]

this has been something we noticed since the vci-100 was introduced back in 2008. The best thing to do is have some type of padding below the vci or turn off the jog wheels.

That's only a symptom treatment, but you are not healing the patient.
Surgery is needed, and has a recovery change of 95%. Do we need to call the family?
:-)

I just don't have the time to experiment with what I came up with, I had to do a quick fix because pitch bend didn't work anymore. A problem? YES, fader effects was involved too.
There was some dirt between the sensor port.

[johndow]

Just did another test and confirms my theory:
I fixed the wheels so they can't rotate anymore.
The thing is still responding to vibrations if I pound on the table.
I'm 100% positive: It must be the unstable disc.

[MaxOne]

Personally I'm not going to muck about with the inner gubbings of my jogs.

I also have a bit of foam under which does the trick mostly

If it's really bad I just press both scratch buttons at the same time and it temporarily disables the jog wheels...

cue up song, disable jogs, play song, sorted