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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Servo - Gyro - Gov - Batt › Logictech 6100T and servo problems!
08-01-2007 01:15 PM  13 years ago
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ejdeleon

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Wichita, KS

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Logictech 6100T and servo problems!
Just pulled my 6100T off my TRex600 and put it into my Raptor 90. While on the Trex it ran well without any problems. Putting it on my Raptor 90, I turned it on and it initialized but the servo kept humming and ever so slightly constantly twitching. When I moved the rudder stick to either direction, the twitching would stop but as soon as I release it, twitching would again resume. This would occur in both HH and normal mode. Dropped the gain on the HH but didn't help. Also tried putting all settings back to default/factory settings but still happening. Adjusted performance setting to all levels (since it was previously on high) and that helped a little but still with twitching even on the lowest setting (I don't know if anyone uses anything lower than standard for this setting anyway). I thought then maybe I mounted it too close to something causing interference. I have an Arizona Heli regulator next to it but even moved it away but still had the problem. It's also near my Xtremelink 2.4GHz receiver (but more than 2 inches) and I tried moving that away, near and still had the same problem.

Has anyone had this problem with their combo? Polarity connections are all good... I know a little humming is normal but this is marked and with twitching. This is all while motor is off - imagine how bad things can get when I actually get it off the ground!

Thoughts anyone?
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08-01-2007 01:22 PM  13 years ago
cfranks

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Adelaide South Australia

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I just had the same but not with a Logictech. Rebuilding a heli and checking various servos for my throttle. ALL of them had slight, repetetive twitching with faint buzzing noise. Different makes and model servoes. I'm also using XPS but I'm fairly sure it wasn't that. Battery 2400 NiCd was bad. Try your battery under load.
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08-01-2007 08:18 PM  13 years ago
ejdeleon

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Wichita, KS

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I've checked the battery which is a LiIon battery running on the Arizona Heli regulator and it seems to be working well. Possible tests to do tonight:

1. Bypass the regulator and just use NiCD and see whether twitching persists
2. Try using different receiver (FM or PCM) and see whether this is causing interference
3. Try plugging it back into my TREX 600 and see whether twitching and humming is still present
4. If all else fails (as recommended by a close heli friend) use a hammer...

I've been having problems with tail drifting / twitching and have even noticed intermittent twitching on my throttle servo since using the Arizona Heli regulator and the Xtremelink receiver. Not sure which of the two may be causing the problem...

Anyone using either component have similar problems?
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08-01-2007 08:59 PM  13 years ago
milli21

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france

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I have excatlly the same problem with my logictech one my 600np
But Flight is good and gyro is perfect in flihgt
I use nimH 2700 V (5 cells) and Robbe regulator for 5,6V
I protect in first time the servo with align 5,1v down regulator
twichting steel (5,7 volts on gyro)
I protect in second time gyro with a second 5,1v down regulator
twichting steel again (4,9 at 5,1 v on gyro)
Flight is always perfect
no solution
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08-02-2007 01:40 AM  13 years ago
ejdeleon

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Wichita, KS

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did some testing this evening with interesting results:

experiment #1: bypassed the regulator and used a NiMH battery directly onto the receiver - no to minimal twitching/humming

experiment #2: switched Arizona Heli regulators to see whether it was my regulator - twitching and humming recurred

experiment #3: changed Xtremelink receivers to see whether that was causing the problem - still with twitching and humming

experiment #4: retried experiment #1 - again no to minimal twitching humming

experiment #5: changed batteries from Relion 5200 to Relion 2600 - twitching was gone!

Relion 5200 is practically new and was never in any hard or soft crashes.

Has anyone ever heard of a Li Ion battery causing interference like this before?

Checked voltages on both batteries - 5200 was 7.4; 2600 was 7.3 and both were running through the regulator providing 4.8 volts to the tail/gyro.

Is the 6100 just overly sensitive and has such a quick response that it is constantly twitching and humming? I wouldn't be too concerned with the twitching and humming except for the fact that after about 5 minutes, the servo is pretty hot.

Twitching is bad enough that you could actually see the tail blades twitching while on the ground with the motor off...
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08-02-2007 02:12 PM  13 years ago
ejdeleon

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Wichita, KS

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additional findings:

I found out why the twitching and humming was so bad. When I put my gyro into my raptor 90, I put it on the front tray (made of carbon fiber) in close proximity to my battery. I found out the closer it was to my battery, the bigger the twitching and humming. I have since put it back behind the main shaft where it was before and have no problems with twitching. Problem solved. It wasn't the battery itself but its proximity to the gyro that caused the interference...
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08-02-2007 02:20 PM  13 years ago
Tday

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Needham, MA

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Thanks for the post on how you resolved this! That's often the missing link when I read these threads. tom
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08-05-2007 05:37 PM  13 years ago
milli21

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france

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I found the problem
First installation is front istallation on S9451.
I put the gyro on the other size (back) and the prblem diseaper
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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Servo - Gyro - Gov - Batt › Logictech 6100T and servo problems!
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