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HelicopterRadio - Servo - Gyro - Gov - Batt › Voltwatch and digital servos chattering
11-24-2006 04:54 PM  11 years agoPost 1
slacsteve

rrNovice

Redwood City, CA

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Swift, 3 9252s and a 9254, 401 gyro, 2100 nimh receiver batt, hobbico voltwatch monitor. Of course the servos chatter which I am told is normal but the Voltwatch display jumps all over the place and is seldom green unless I tweak the digitals to stop chattering. That's on the ground. I can only imagine what it looks like in the air. (I have it mounted under the clear canopy facing up. Should I expect it to be solid green even with a lot of servo movement? Maybe I should use BEC or maybe I have a bad battery. What is a solid receiver setup for helis? I have seen some non-pilot strange behavior so I need to fix this.

r/c anything
rc cars boats planes helis legos cat toys

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11-24-2006 06:46 PM  11 years agoPost 2
Angelos

rrKey Veteran

nr Oxford, OX11, UK

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Digital servos have higher current demand and generate a lot of noise on the power supply lines. Your Voltwatch just displays what it sees... a noisy voltage. To get an accurate reading you need a more intelligent battery monitor that filters the voltage to get an accurate measurement. Battery monitors are evolving and some are able to deal with digital servos. One of them is the Voltguard G3 is my own design and uses a small microprocessor to do digital filtering. It also memorises the lowest voltage seen in flight. http://www.spartan-rc.com/products/voltguard_g3/g3.htm

-Angelos

Spartan RC R&D

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11-25-2006 03:06 AM  11 years agoPost 3
monterey_tip

rrVeteran

Monterey, Ca - USA

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Problem solved
Turns out I mounted the 401 on top of the 9254 with tape. This caused the chatter. Switching to another digital servo the problem went away. Bringing the 9254 close to the 401 again caused a great deal of chatter which is reflected in the voltwatch. I will separate the 9254 fom the 401 with a bit more distance.

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HelicopterRadio - Servo - Gyro - Gov - Batt › Voltwatch and digital servos chattering
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