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HomeRC & PowerAircraftHelicopterRadio - Futaba FASST › Futaba BLS 255/256 servos no more?
09-19-2013 01:53 PM  5 years agoPost 21
Four Stroker

rrElite Veteran

Atlanta

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My question is whether SBus2 servos will be two-way and communicate where they are to the FBL so that eCCPM works without interaction or contortions like 140 swash.

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09-19-2013 02:23 PM  5 years agoPost 22
Ace Dude

rrProfessor

USA

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Good question. I haven't seen anything to indicate the S.BUS2 servos communicate bi-directionally during normal operation.

  

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09-19-2013 03:48 PM  5 years agoPost 23
Dr.Ben

rrMaster

Richmond, VA, USA

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To my knowledge there is no two way communication of the S.Bus2 servos, certainly not with the 750.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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09-19-2013 06:01 PM  5 years agoPost 24
Skaluf

rrVeteran

Champaign, IL

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Currently S.Bus2 servos do not communicate in both directions. They only receive commands.

Steve

Steve Kaluf
Hobbico

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09-19-2013 06:19 PM  5 years agoPost 25
JKos

rrProfessor

Redondo Beach, CA

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communicate where they are to the FBL
The sole purpose in life of a servo is to be where it has been commanded to be. If the servo thinks it is where it has been commanded, then that's where it will report that it is. If the servo is not where it has been commanded, then it must not be physically capable of getting there (either in time or force).

That being said, information such as position error could be used to diagnose or predict certain issues such as a servo that lacks enough torque/speed for the purpose, insufficient power, or degrading functionality.

I believe we will see a day when servos report voltage, current, temperature, and position error. That would be powerful data to anticipate failures.

- John

RR rules!

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09-20-2013 01:10 AM  5 years agoPost 26
Four Stroker

rrElite Veteran

Atlanta

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The ultimate FBL system would not have three independent servos running open loop.

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09-20-2013 02:02 AM  5 years agoPost 27
AWittleWabbit

rrElite Veteran

O.C., CA

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John,

Position error data would be mint. We would know for sure if the servo has enough grunt/speed. If the error is really high intermittently, it might be good sign the feedback is going to go kaput.

I see servos doing IBIT on startup someday

Four stroker, what do you mean? Servos do have loop closure.

Heli-itis sufferer.

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HomeRC & PowerAircraftHelicopterRadio - Futaba FASST › Futaba BLS 255/256 servos no more?
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