Yamaha DTXpress/DTXplorer/DTXtreme

I'm having a related problem with my kick drum pad but I'm not sure 
it's the same thing. The drummer in my band is a bit heavy-footed 
and after about a year of no problems, it seems the pad doesn't 
respond to hard kicks. A moderate kick will trigger OK, but when he 
plays it hard there are random non-triggers (I would have thought 
you would need increasing pressure trigger something that has been 
stretched out?). I haven't taken it apart (any direction there would 
be appreciated) and I'm not even sure what the warranty is on these 
drums. Any help is greatly welcomed- thanks.
Mark
--- In DTXpress@yahoogroups.com, rdamon@m... wrote:
> Just to throw out a quick thought.  The KP65 piezo, unlike the 
PCY/TP pads
> has a substantial amount of pading between the surface of the 
rubber and the
> actual piezo.
>  
> On the PCY, the piezo has a thin layer of plastic and rubber 
pading between
> it and the striking surface, nothing to temp/permanantly deform to 
any
> degree. On the TP the piezo has a metal plate and a thin layer of 
rubber
> pading between it and the striking surface, again nothing to
> temp/permanantly deform to any degree.
>  
> But on the KP65 there is a heavy rubber cover that is not bonded 
to anything
> and behind it is a thick layer of foam that is bonded to the metal 
plate
> that secures the piezo. After repeated heavy blows to the KP65 the 
following
> could and will occur:
>  
> The outer rubber cover could be pulling away from the foam as it 
temp.
> stretches from repeated strikes.
> The thick foam behind the pad could be compressing and not 
expanding back
> out quick enough to make contact with the outer rubber pad. 
>  
> I used to leave my foot on the pedal with the felt beater pressed 
against
> the rubber pad between beats and would end up having similair 
missed beats.
> Since I stopped leaving the beater pressed against the rubber pad, 
the
> problem has disappeared for me.
>  
> I wonder if putting some adhesive between the rubber pad and the 
foam to
> bind them together would help?
>  
> The other possibility is simply a loose connection.
>  
> Other things to look at are the settings such as the curves; 
normal, loud1,
> loud2, hard1, hard2 and Self rej is set to a low number. 
>  
>  
> OGD
> 
>    _____  
> 
> From: nugeman2004 Sent: Monday, May 03, 2004 9:49 PM
> To: DTXpress@yahoogroups.com
> Subject: [DTXpress] Re: DTXpress 1 Bass drum trigger problem
> 
> 
> --- In DTXpress@yahoogroups.com, "emf" <liberatusvirus@y...> wrote:
> > --- In DTXpress@yahoogroups.com, "robert_cathy" 
<robert_cathy@y...> 
> > wrote:
> > > Has anyone heard of this problem, sometimes but not always 
when I 
> > am 
> > > hitting a snare, cymbal or highhat, the bass drum doesn't 
trigger 
> a 
> > > sound even thought it is being hit? It is a intermitten 
problem 
> > that 
> > > I have to listen closely to hear. My daughter is trying to 
learn 
> > and 
> > > that how I found it. Any ideas? Any solutions?
> > 
> > Hi Robert,
> > 
> > Dropouts aren't terribly unusual. But, as Will's post indicates, 
> the 
> > kick pad isn't usually the victim--at least for interactive 
> reasons. 
> > When a pad on the rack gets hit, the rack can transmit 
vibrations 
> to 
> > one or more of the other ones, causing a sympathetic reaction. 
This 
> > phenomenon is called crosstalk, and Yamaha has "rejection" 
settings 
> > to minimize it in the trigger menu. Rejection's remedy for a pad 
> > firing unintentionally as a result of events on other pads is to 
> mute 
> > it unless it is hit with a certain minimum force (the rejection 
> > number). "Specific rejection" protects a pad from hits on a 
certain 
> > other pad, normally close to it, in the same manner. "Self-
> rejection" 
> > guards against a pad reacting to itself (double-triggers), 
usually 
> > because gain is too high. If a drummer fails to strike a pad 
with 
> > enough force to circumvent the muting enabled by any of these 
> > rejection parameters during another offending event, it won't 
make 
> > any noise. Many dropouts are caused by rejection settings that 
are 
> > too high. By all means, if the kick drum input carries high 
> rejection 
> > numbers, reduce them to the point where the offending artifacts 
> > disappear. 
> > 
> > That said, however, the fact that the kick pad isn't on the rack 
> > reduces the chances that rejection as a means to defeat 
crosstalk 
> is 
> > the culprit. A high self-rejection is still a possibility, 
though 
> you 
> > would have known if you'd set it, right? One other possibility 
is 
> > that your gain and/or minimum velocity settings aren't optimal. 
If 
> > gain is too low and min.vel. too high, you could get false 
> > triggering. It might not happen when you play the kick by 
itself, 
> but 
> > in the heat of battle when your attention is divided, the kick 
> might 
> > not be getting the same impact. Try changing the gain and min. 
vel. 
> > settings as indicated. 
> > 
> > A last resort might be that the something has come loose inside 
the 
> > kick tower. Sometimes resoldering everything can improve 
response, 
> > even if you don't actually see a loose connection somewhere. 
> > 
> > I hope these suggestions help. Please let us know. If worst 
comes 
> to 
> > worst, are you still under warranty? I should add that if you're 
> > using the KP60 kick pad, I'd be far less surprised by your 
problem 
> > than if you were using the the KP65.
> > 
> > Ed
> I too, have the same issue! when playing as Ed said "heat of the 
> battle" and do an accent of snare and cymbbal, the kick almost 
always 
> will not sound, And I am certainly kicking it! I have tried it 
with 
> the tower yammy set up , as well as a pintech trigger,the small 
> cylindrical one (scientific,no?) and the results are about the 
same. 
> I did have some issues with the yammy stand up trigger,and had to 
> disassemble and solder the jack terminals back solidly to the pc 
> board...that cured the hit/no sound, but not the no kick response 
> when hitting cymbal(any) and or cymbal/snare /kick...any ideas Ed? 
kb
> 
> 
> 
>  
> 
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