despite having the newest firmware, as well as warming up my decks before playing by leaving them on for 10mins, one of my 6000m’s periodically drifts out of sync when the platter is engaged.
if i leave the motor off for a bit, it will work for a while but then the drift happens again (always lagging, never too fast).
i assume this is a mechanical fault - any idea how I can fix it.
many thanks max
Can you please post the steps and a video demonstrating how to do this and it in operation?
I don’t keep a track on for 10 minutes, but this is worth others trying to reproduce.
Thank you 
Sorry, i’ve been a bit imprecise here.
what i mean, is:
i’ve seen a few other threads that say they have motorised platter drift issues when it’s cold. so they suggest playing the decks for 10-15mins before getting going in earnest.
so what i mean is, i’ve got the decks up to temperature before mixing.
then, when i mix, with the sync button engaged, playing very simple 4x4 house music, the deck will start losing tempo and drifting out of sync. when i switch off the motor, the drif stops. i can press sync, the beatmatch syncs again and doesn’t drift out again, until i put the motor back on.
from this i can only surmise it’s a mechanical issue, rather than a software issue. i don’t want to go exploring the innards of my deck unless i know there’s a clear solution
hope that helps max
The problems mentioned concerning motorized platters when cold apparently mainly concern the old 5000m units whose grease used tended to harden over time and with low temperatures.
This problem seems to have been resolved on the new 6000M units which seem to use a better quality grease. We have not yet really seen any complaints on this forum from people with 6000Ms and who encounter this problem related to the grease for the moment. You should therefore not need to warm up the motors before having to mix on 6000M. Obviously these units are more recent and perhaps we do not have enough perspective at this stage.
In any case, if you do not encounter any drift while the engine is stopped, it is a problem related to the engine rotation speed.
A simple test that you can do:
When changing layers, the engine management switches priority to the active layer, so your layer A will work as if the engine was off. Repeat this test on each player separately and see if you get a drift on the same player in double instant. If one of your two players drifts in double instant, therefore on the same track with engine engaged on one of the layers, then it is probably that you are faced with a grease that has become too hard over time and that you will have to consider replacing it (this is a relatively easy maintenance to do if you take your time). But you would be the first to encounter this problem on the 6000M series
Thanks -i’ve given the instant double approach a try as you suggest. it maintained sync across all four layers, regardless of what was the lead tempo.
the odd thing is the intermittency of the problem. my decks can work perfectly for an hour, and then the deck won’t sync with the motor on.
i can only assume therefore, that it’s a mechanical issue.
it’s manageable at the moment (i just switch the motor off and then back on again a few minutes later) but i think it probably needs a checkup with a denon specialist to be sure.
thanks for your help max
Have you performed this test without using the synchronization function (sync buttons), just activate the double instant with the motor engaged on both layers and let it play.
Most people who have encountered drift problems related to grease that has become too hard on the 5000m units, have encountered it playing in an environment where the ambient temperature was relatively low (< 16¨C) since the low ambient temperature favored the hardening of the grease on these units.
This is why warming them up by running the engine for about 20 minutes helps to warm up and fluidify the grease on these units. Assuming that you are faced with this problem related to grease, the variations in ambient temperature can explain the intermittent and random appearance.
In order to identify if you are really faced with this specific problem, it would be interesting if you could take ambient temperature readings when you notice these problems, and from what ambient temperature you no longer notice them.
If you do a double instant test on each units one by one separately, cold and see no drift we should be able to rule out a grease issue.
If it is really a grease problem you can follow the steps in the tutorial below to perform the grease replacement yourself on the problematic unit.
The procedure is performed here on 5000m, but should be quite the same on 6000M. Note that opening the unit will void your warranty, so it is best to perform this by yourself only if your warranty period is over.
This may seem daunting but in reality it is a relatively simple and easy operation to perform if you follow the steps to the letter and take your time.
https://www.brightdotdesign.com/sc5000m
Could you also indicate what firmware version you are using?
thanks for detailed response.
both decks run the latest firmware (4.4.0) the room where i play is normally pretty warm, and was at least 20C when the last problem happened.
if the problem persists i will replace the grease. it won’t be my first time repairing my own equipment.
thanks max
If you do end up taking apart your decks, may I ask you to share a few detailed photos of the video connector and the screen? =) I have some ideas for a project, but won’t do any of it until i know more about the pins , etc. =)
I had the same problem on one player, players (sc6000m) are 1 year old, i replaced the grease and that solved the problem.
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