Random Pitch Slider "Movements"

I bought an NS7II used off of Ebay, and it's giving me a weird problem. I'd like to think it's not me with the problem, but I've never used this controller before, so I'd like to know if anyone else has seen this.

I noticed while DJing with Serato that once every other track or so, the BPM would randomly jump about 0.5% up or down. That doesn't sound like much, but at the 50% setting, that's enough to throw two tracks off almost instantly. At first I thought it was the motors in the platters, or vibrations from the music throwing things off. But with the platters turned off, the same thing happened. With the music turned off, same thing.

So to further nail down the cause, I turned Serato off altogether, and installed Bome's Midi Translator, which also has a MIDI monitor. Sure enough, after a few minutes, I received a MIDI message from the sliders, even though they were completely still.

Am I being too sensitive or are the sliders? It sounds to me like they need to be cleaned. Assuming the board is out of warranty (I think it is) what's the best way of going about this? I REALLY don't want to take the controller completely apart just to clean the sliders, so is there any easier way? Any advice?
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  • Make sure that your DJ software is not set to automatically beat match on load. Turn off any auto aplications and set them to smart or off. The NS7 series is a beast! Once you have the setting down, pure bliss!

    One more thing of note, I might get yelled at or have this removed, but, the NS7 is a pure resource hog. The Numark spec guidelines lack, you really need some over the top specs to run this console smoothly.

    I had many hiccups and glitches until I bought a gamer type laptop.

    Be sure to double check with your DJ software settings!
    • I wish it was that simple, but no. Even with the computer rebooted, controller restarted and recalibrated, and Serato closed, it's still sending MIDI messages randomly. The crossfader sometimes sends messages too, but that's more understandable considering how loose it is, and it doesn't matter if that drifts slightly.

      I know it might seem a bit petty, but when I set two tracks to 130BPM, I expect them to stay there, not drift randomly to 129.8 or 130.1. It's very frustrating, because I really want to like this controller.
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  • Hi Mike,

    Thanks for posting. I'm sorry to hear you're having issues with your NS7II.

    Can you please provide me with your full system specs? Since Serato can use a lot of computer resources, I highly suggest you optimize your system. below is a helpful guide that will walk you through the process of doing so:


    If your sliders are "ghosting" MIDI data (which it sounds like they are, based on what you've described), you'll likely need to service your controller. Before going down that route though, make sure your pots and sliders are clean. To clean the contacts and faders, you'll need to use fader lube. My personal favorite is made by DeoxIT. 

    Try that out and let me know how it goes!

    If you find your faders are continuing to ghost after cleaning, please log on to www.numark.com/support to get in touch with Technical Support and service your NS7II.

    Let me know if you have any further questions.
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  • The system is definitely optimized. I used to work desktop support IT, so believe me, I know what I'm doing in that respect.

    I've tried shooting FaderLube down in where the faders slide up and down, but it doesn't seem to make a difference. If they're like other sliders I've seen, the contacts that need to be cleaned are enclosed in a plastic box to reduce the amount of dust that gets down there. Getting to that looks like it's impossible without completely disassembling the PCB from the case. Why don't companies make these parts user serviceable when they're the most likely to fail prematurely? It's so frustrating!

    If the controller is out of warranty (I'm trying to find out from the previous owner) how much would it be to have it serviced? Or would that depend on what exactly is wrong with it? How long is a standard warranty on this controller for?
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  • Warranty and non-warranty claims are not handled here on the forum, but I can point you in the right direction! Here are a couple of options that you could choose from:

    • Submit a Warranty or Service inquiry with our Technical Support team by logging onto the Numark Support Page. Select Warranty or Service Inquiry from the drop-down menu.

    or


    Make sure to reference or link this thread to help out the support team.

    I hope this helps! Let me know if you have any additional questions.
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  • Bill is probably right about it needing servicing, he's the man on troubleshooting issues and not to say this will work at all, but you can try recalibrating the ns7ii. Click here:


    http://www.numark.com/kb/article/1798


    Bill, will recalibration help at all?
    • Yup. Tried recalibration as well. No dice. I've decided it's not frequent enough to warrant spending the money to get it fixed, or to take it apart myself. I'm sure it's only going to get worse as the controller ages, so eventually I'm sure I'll have to. I don't get why Numark would make this thing with such high build quality outside, but such cheap components inside where it counts (sliders, notches in pots wearing out, fx knobs breaking off, etc).
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  • Hello,

    Like I said in my previous post, the NS7II will need to be serviced. Please get in touch with your nearest Support Office to coordinate service. Thanks!
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