Audio Mixing Platform (AMP)

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Author Topic: Motormix  (Read 13488 times)


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Re: Motormix
« Reply #30 on: April 22, 2016, 12:44:59 PM »

That's unfortunate but it is what I feared the outcome would be for quite some time now.  With only a web site and email (no phone or address) it was all too easy for Carl to just just disappear.  I hope he is OK and perhaps he will return, who knows.

But I personally wouldn't spend any more money on my Motormixes and I own three of them. All have some issue or another and one has already been refurbished once before.

Someone here recently mentioned fixing their own, perhaps there is a side business for repairing these guys.   :)


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Re: Motormix
« Reply #31 on: April 25, 2016, 11:39:17 AM »

I've got a bunch of dead MMs here, all with varying issues.  Most of the problems seem to be in the CPU board, and its connections to the board on top of it.



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Re: Motormix
« Reply #32 on: April 25, 2016, 11:48:20 AM »

So are you saying that they are fixable? 

And is New Life Electronics taking on Motormix repairs?   :)

I know one of mine probably isn't really fixable sans a full rebuild since it has motor issues with some faders.  But the other two are primarily display related issue or one random fader that will suddenly stop moving correctly.


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Re: Motormix
« Reply #33 on: April 25, 2016, 01:30:54 PM »

I did find Carl's email after someone suggested checking his website domain info, but it got returned as a dead email. Haven't tried the phone number yet. The FB group admin said he was still around but working on other things, possibly software related if I recall correctly, which may explain why he took down (or let expire) his Motormix website.

My Motormixes primarily have fader travel issues, i.e. sticking or not reacting correctly, and the SAC screen follows the stuck fader so it causes random audio changes. But there are also some MIDI-related issues where the physical and virtual faders don't match, but if you move the physical fader the virtual fader jumps to meet it.

I made a video of it a bit ago that shows it being repeatable:



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Re: Motormix
« Reply #34 on: April 26, 2016, 11:12:51 PM »

No, no Motormix repair work going on here!  I do find it rather interesting though that with some of the little single-board PCs that are out there now, you could probably replace all the logic stuff in the MM with $50 of PC boards, and have a better system.  Just takes someone with some time and energy!



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Re: Motormix
« Reply #35 on: July 12, 2016, 05:57:55 PM »

Could this be a hint of what the Motor Mix goes blank problem is?

Garth D. Wiebe wrote:
We have seen increasing instances of AudioRail failures due to bad
contacts on the Molex connector on the power supply that supplies 3.3
Volts to the main board. These contacts are deteriorating, due to
insufficient tin plating over the phosphor bronze metal contact base, in
as soon as 6-18 months from time of manufacture (including stock time here).

This applies to all units shipped prior to 6/15/2007.

The symptom of this failure is that all four LEDs on the rear of the
failing unit will go out for at least a noticeable fraction of a second
(typical minimum of 200ms), if not more, while the front panel LED may
flicker slightly (this may not be noticeable, as only about 30
microseconds loss of contact is required to fail). When this happens,
you will get a complete dropout from all channels during that time,
while the AudioRail unit goes through its power-on reset. In some
instances, 0 dBFS noise will occur as the entire digital audio
installation recovers and resyncs to the sample clocks. The non-failing
AudioRail unit(s) at the other end of the Cat5 cable(s) will have only
the two inner rear LEDs go out, signifying a loss of receive signal from
the adjacent failing unit.

The inside of an AudioRail unit, showing the connector, is shown here:

The remedy is to simply solder the wires down to the connector pins:

This is an easy soldering task for most people in the professional audio
industry. However, if you do not feel comfortable doing this rework,
please contact us to arrange to have your units shipped back so that we
can do it for you.

It is essential that this work be done to all AudioRail units. Note
that simply pulling out and reinserting the existing power connector
will guarantee reliable operation for at least several months, if not
more. But this should not be considered a permanent remedy. Soldering
the wires down is the permanent remedy.

Please do NOT remove the power supply. There are noise immunity and
safety issues having to do with how it is mounted. If you opt to do the
soldering yourself, please just solder the wires to the connector pins
as shown in the photographs above.

Note that the high voltage connector is inherently not vulnerable to
this problem, because of the high voltage, which just blasts through any
developing oxidation. The high voltage connector should not be reworked.

We apologize for this situation, and for any failures that you may have
encountered. As you know, we tried in all areas to make AudioRail
reliable through simplicity of design and conservative engineering. One
of our selling points was that we had "no cable harnesses besides that
connecting to the power supply." Unfortunately, one of those cable
harnesses connected to the power supply has turned out to be unreliable,
and has caused audio dropouts in a number of broadcast, live recording,
and live sound productions in various places. This has been an
embarrassment to both our customers and us. It has taken nearly two
years for us to find the problem (first reported by a customer in
September 2005), because transporting failed units almost always
temporarily fixed the problem, as well as the simple act of removing the
top cover, which the red and black wires are normally pressed up
against. The actual contact area can be less than 0.5mm square, and
evidence of the problem cannot be seen without a microscope and proper
lighting. In some instances the tin plating is sparse to begin with,
and is getting scraped off on the first insertion of the connector.


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Re: Motormix
« Reply #36 on: July 13, 2016, 10:51:47 AM »

When I had trouble with the MotorMixes, I learned from Carl that the multi-pin header that connects two circuit boards would oxidize and simply separating them and cleaning the connector and pins fixed them for a while.  I had to do that, roughly, once a year when I had MotorMixes.

I've since sold them and replaced with X-Touch. The X-Touch units are nice and I've grown quite used to many of the features. 

I would like to get a few more buttons made useful and the 9th fader and jog wheel... But they're better than the BCF or the MotorMix.

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