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Re: [Paparazzi-devel] Reply to:"Question regarding servo motor (Steffen

From: Steffen Spies
Subject: Re: [Paparazzi-devel] Reply to:"Question regarding servo motor (Steffen Spies)"
Date: Thu, 14 Jul 2011 20:09:28 +0200
User-agent: Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20110624 Thunderbird/5.0

That's a good point. I use a Radiotronix Wi232 EUR (868 MHz Europe Version).
But meanwhile I think I found the reason - I guess it was the servo itself.
I have removed all external parts - no rc rcv, no wi232, no servos and started checking the signals while connecting piece by piece. All signals are perfect - not a single jitter! I also but the modem right beside the servos, the microcontroller, etc... all fine!

So I think in my case the one servo was already broken and maybe dropped the voltage to level were everything just worked.

I have ordered new servos and will give it another try.

Thanx to all of you for your hints! I will keep you updated!

Am 14.07.2011 14:23, schrieb Chris:
Is the modem active at the same time?
I used to have jitter that would go and come back again at random and the culprit was
the 9xtNbd modem (900Mhz).
Actually the modem is not the guilty part, servos that have poor filtering are or in your case the rc receiver might be problematic also.
Some servos are prone to this and some others are not.
For example the Hyperion ATLAS DS20x is behaving like crazy when the modem is active but the
DS20 (not X) is totally immune to 900Mhz noise.

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