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novatron
Livepa.org Regular
Joined: 21 Mar 2005
Posts: 302
Location: SeaTTle |
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 KNOB "JITTERS" |
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you ever have them? it's where, without touching a knob- it changes values on you??
I have a KORG ESX with what i think is now 3, knobs that change value
(ever so slightly like, just one incriment up and down) all on their own. it is intermittent
and may be fine for a few days in a row, but then all of a sudden, what the
fuck! just happed to my bassline?? oh ya, the cutoff just decided to jump on me, great.
oh look , the efx edit knobs are changing value, rad, now i can't change patterns.
i guess this is semi common problem with these boxes, at least from what i gather
from korg forum (dot) com. and of course korg ain't saying shit on this one.
sounds like bad pots right?
need some advise here. should i clean them? and what's the best way to do so??
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Last edited by novatron on Thu Aug 09, 2007 2:07 am; edited 1 time in total |
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| Tue May 01, 2007 10:56 am |
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McSmooth
Livepa.org Regular
Joined: 22 Mar 2005
Posts: 353
Location: Chicago |
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At first I thought this was about being nervous, or under the influence of something during a show while working the knobs 
I'm pretty sure you can clean pots, but "digital pots" are actually encoders which is something different. I'm sure someone will chime in on that. My Oxegyn8 has the crappiest encoders. They jump all over the place and I have to leave them at 0 to keep from getting the mystery value change. Maybe because it was one of the first cheap midi controllers... I hear they are better these days.
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| Tue May 01, 2007 2:09 pm |
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digitalgeist
Livepa.org Mainstay
Joined: 27 Jul 2005
Posts: 720
Location: MTV Networks, NYC |
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My parameters don't glide at all, but the big annoyance I have with my M-Audio Axiom 25 is that when it turns on the knobs are all set to some weird values that I need to re-adjust, and if I forget about it things can get really screwed up.
For instance, one knob I have assigned controlling patch volume. The first time I touch the knob it always jumps to "4" when I usually like it to be around 90-127. That's a big problem if I forget during a live set, because it'll go from good volume to almost silent until I can frantically spin the knob back up. 
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| Tue May 01, 2007 3:20 pm |
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m2a2m
Livepa.org Regular
Joined: 02 Mar 2006
Posts: 325
Location: Rocky Mountains, USA |
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i had 1 flaky knob on my rs that was jumping around up and down values when being turned. someone here in another thread pointed me to this link, his cleaning method worked for me: http://todbot.com/a3k/knobs/#knob_cleaning
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| Tue May 01, 2007 4:46 pm |
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przem
Livepa.org Newcomer
Joined: 06 Jun 2006
Posts: 12
Location: wroclaw / poland |
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The pots may be a little dirty but i had the same problem with esx, which was 2 weeks old.
The problem is that the pots are made of plastic, and when soldering or using too much power to move them, they can break up.
When they do - cleaning wont help.
I ordered few alps pot's from farnell:
http://uk.farnell.com/jsp/search/productdetail.jsp?sku=919100&N=401
and they're working ok.
But remember to be careful while soldering and don't overheat the pots!
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| Wed May 02, 2007 12:09 pm |
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novatron
Livepa.org Regular
Joined: 21 Mar 2005
Posts: 302
Location: SeaTTle |
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so i haven't bothered to try n fix the knobs on my sx
and just been living with it.
i have this feeling that's it's not the encoders and something
else like either what 'controls' them or what ever reads their
values, because when this starts acting up there will be 5, 6 or 7
knobs all acting up at the same time  -both efx knobs,
both modulations knobs, cutoff, level, pitch. the display just
keeps jumping all around between all these knobs.
might be time to retire the ol' electribes. i just ordered a spectralis 
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| Thu Aug 09, 2007 2:17 am |
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sup909
Livepa.org Veteran
Joined: 21 Mar 2005
Posts: 1054
Location: Forest Park, IL |
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My AN200 main data knob is pretty messed up. It often times when I turn it to the right to go up in value will jump up "1" and then down "2", in effect decreasing the value.
It works fine turning to the left, and will work if I turn it slowly to the right. I have cleaned it out, but never really bothered to open it up to have a look.
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| Thu Aug 09, 2007 2:43 am |
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Blitz
Livepa.org Veteran
Joined: 25 Aug 2006
Posts: 1207
Location: Australia |
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My AN200 main data knob is pretty messed up. It often times when I turn it to the right to go up in value will jump up "1" and then down "2", in effect decreasing the value.
It works fine turning to the left, and will work if I turn it slowly to the right. I have cleaned it out, but never really bothered to open it up to have a look. |
my stereo's volume knob does that. . i dont think its a dirt problem.
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| Thu Aug 09, 2007 3:24 am |
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Komplex
Livepa.org Acquaintance
Joined: 10 Apr 2005
Posts: 99
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yamaha a4000 rotary encoders are notorious for doing this shit and it makes the thing un-usable untill you take it apart and re-solder the joints or replace the encoders
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| Fri Aug 10, 2007 7:39 am |
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sonik303
Livepa.org Newcomer
Joined: 27 Nov 2006
Posts: 37
Location: Vilnius, Lithuania |
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Hey guys.. chill out on those old equipment's flimsy encoders. I have an early release of Akai MPD24 controller, which had jittery knobs right out of the box! Apparently Akai has admitted, that those knobs are of shitty quality and are replacing the units with the new ones...
this is what happens, when corporations rush unfinished and untested products into the market. shame.
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| Fri Aug 10, 2007 10:13 am |
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SonicDisturbance
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Joined: 23 Mar 2005
Posts: 748
Location: Metro Detroit |
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| Fri Aug 10, 2007 12:42 pm |
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nick_s
Livepa.org Regular
Joined: 19 Feb 2007
Posts: 206
Location: cleveland, oh 216 in the MIX! |
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there is a fix for the emu's data wheel that may have some revalance to this conversation.
http://www.jsigle.com/musicol/emufix.htm
this fix works for all digital encoders, not just the emu's wheel....a friend of mine did this to a moog source with a janky data wheel, the wheel now works, but he is in the process of re-habbing the membrane switches(why do the microwave membranes work fine, but the synth membranes dont!!!!).
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| Fri Aug 10, 2007 5:19 pm |
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