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Home✈️Aircraft🚁HelicopterBeginners Corner › SBus servos
10-28-2013 08:22 PM  5 years ago
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Harpy

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Columbus, Oh

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SBus servos
I am building a 600 and converting it to 700. I want the heli to slow and docile with hope of fitting a fuselage at some point. I am wondering if Futaba 3071HV can at least get me started. They are a bit slow at 0.17sec 145.9 oz-in. I did put a proper tail servo in. It will be flybarless with a Naza H.
I was also wondering about the Smoother and Boost function of the servos. I plug them right into my TX to program, but programing them will be lost once plugged into the gyro (unless I unplug them and plug in to the tx again).
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11-03-2013 02:24 AM  5 years ago
devin120

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Canada

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That's plenty my friend. Plenty. Just make sure their receiving good consistent power.

The smoothe boost functions your talking about are adjustments int he servo? I would leave it be. You have so much on your plate already with a new machine, a naza, tuning, you don't need to be fiddling with things.

You'll have much greater results playing with the naza functions.

145 is great torque. And that's not too slow.

Remember too, you could have 500 oz of torque and .25 sec but it will move that quick with 500 oz of torque. While a ridiculous .07 175 oz torque servo is quick as hell, but which servo will reach its determined position first under a massive load.

Its a trade off.

140oz is my min for 90's.

I run
0.10 - 245.68 oz

S-bus is not useful on a heli. You don't need s bus servos. Their for reducing wiring on large scale aircraft with 4 flaps, spoilers, ailerons etc. yeh dig.
Miniature Aircraft - OS power - Futaba electronics
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11-05-2013 05:19 PM  5 years ago
Harpy

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Columbus, Oh

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Thanks for the info. The only feature I liked with the SBus servos is to adjust their starting position, but you can do that with sub trim in the radio. The feature I wanted was to use the SBus port to talk to the Naza H via one cable. Since it has a SBus 2 port the main SBus port adds an extra data bit and the Naza H can't understand it. DJI fixed the firmware with Naza M, but not the H yet. SBus has been kind of bust for me. I suppose I can add over priced telemetry sensors.
I am using a 2s 2000 mah to power the electronics hopefully that isn't too much juice. I think max is 8.2 volts. Thanks again for the info.
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11-10-2013 09:19 PM  5 years ago
devin120

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Canada

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Whats your rx? Its 1 connection from the rx to the naza. Then naza to servos. And any programmable servo you can adjust mid position not just s bus. Sub trim is a big no no in fbl in my opinion and these days they should be setup mechanically 100%.Miniature Aircraft - OS power - Futaba electronics
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11-16-2013 03:29 AM  5 years ago
Harpy

rrNovice

Columbus, Oh

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It's the R7008SB Rx. I contacted DJI and they said SBus 2 receiver's are not compatible with the Nasa H via the SBus port, so I have to connect all the wires. I was just hooking the individual servos to the TX to program the start point.
I had a heli around 1998 and so much has changed like CCPM mixing, Flybarless, Electric, and 3 axis Gyros I am quite lost. I am finally beginning to understand that setup is almost completely done through the Naza and not radio. I am getting there slowly. I miss my Nexus. Nice to know sub trim is a no no.
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