RunRyder RC Helicopter Topic - Scale HELICOMMAND USERS - Help, throw me a bone !!!!

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Scale Model RC Helicopters > Scale HELICOMMAND USERS - Help, throw me a bone !!!!

HS10

Senior Heliman - Location: Elk River, MN - My Posts This: Topic Forum

Hi Foilks

I setup my Helicommand a long time ago and recently had a servo starting to go bad... I replaced the original Futaba S9252 servos with HiTec HS-56454MG servos... (extra servos a friend had on the bench)

I believe that the extra torque and metal gears will improve flybarless performance... The failed Futaba servo had missing nylon gear teeth...

I also took this an an opportunity to do a major inspection of the helicopter and replace my Futaba 9C/Spektrum module with a JR 9303...

Got everything working in terms of correct swashplate and collective operation....

STRANGE THING: The ridge system works the swashplate in the opposite direction. The only way to correct it was to tell the Helicommad the the unit was in back, when it is infact in front...

Otherwise everything seems to work OK...

Ideas???

Futaba S9252

Speed: 0.14 sec/60°
Torque: 92 oz-in (6.6 kg-cm) @ 4.8V

HiTec HS-56454MG

Speed: 0.18 sec @ 60 deg.
Torque: 168.03 oz.in @ 4.8v

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07-03-2009 05:58 PM

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geker
Senior Heliman
Location: lykens,PA

My Posts This: Topic Forum

not sure but maybe its just because of the new radio and it see's it backwards now just a guess, but if it works fine the way you have it i would think your good to go, but i dont use helicommand so not 100 % that someone will i am sure and they will let you know

07-03-2009 06:02 PM

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HS10
Senior Heliman
Location: Elk River, MN

My Posts This: Topic Forum

Hi geker

Thanks for the fast response...

Programming between the Futaba and JR seems very very different...

Never used JR radios before, but the Futaba seems easier and more flexible...

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07-03-2009 06:05 PM

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jack726
Veteran
Location: Cerritos California

My Posts This: Topic Forum

Futaba servos turn in the opposite direction to JR or Hitec servos. JR and Futaba radios use the opposite polarity pulse. If I remember correctly Futaba is a + going pulse and JR is a - going pulse.

07-03-2009 11:01 PM

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geker
Senior Heliman
Location: lykens,PA

My Posts This: Topic Forum

that would explain why he had to reverse it.

07-03-2009 11:13 PM

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HS10
Senior Heliman
Location: Elk River, MN

My Posts This: Topic Forum

Thanks jack726

Never knew the polarity was reversed between these...

In their manuals it is probably buried somewhere... They should use large font at the beginning of the manual and say something like:

NOTICE: JR and FUTABA USE OPPOSITE POLARITY FROM EACH OTHER!!! SWITCHING BETWEEN RADIOS MEANS EVERYTHING IS BACKWARDS

Thanks, this may be common knowledge to others, but it is very helpful to me... THANKS...

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07-03-2009 11:43 PM

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Gregg
Heliman
Location: Alkol, WV - USA

My Posts This: Topic Forum

HS10, I ran into a problem similiar to yours and emailed Captron about it. In a word they said DO NOT FLY THIS WAY, meaning don't try to fool HC by telling it, it is mounted somewhere it isn't. They said to keep working with the Mixer Tab and RC Trim Tab in the software untill it was right. You might have to change the travel value of Swash Ch 6 in the radio to make the swash move up or down as needed. Also I believe Futaba uses Ch 1 and 2 for Aileron and Elevator and JR uses Ch 2 and Ch 3, so make sure you have everything hooked up correctly.

07-04-2009 03:01 AM

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HS10
Senior Heliman
Location: Elk River, MN

My Posts This: Topic Forum

Hi Gregg

Thanks for the warning !!!

I will double check the wires, but I am sure they are connected according to the instructions...

Do you remember how you got it to switch back to normal using the software???

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07-04-2009 03:23 AM

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HS10
Senior Heliman
Location: Elk River, MN

My Posts This: Topic Forum

Hi Gregg & jack726 & geker

You folks and Runryder save the day again...

It was like playing nightmarish game of "Rubik's Cube" trying so many combinations I can't remember them all... I finally got the right combination and it works... I am now back were I was...

Thank for saving my ship!!!!

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07-04-2009 04:19 AM

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Scale Model RC Helicopters > Scale HELICOMMAND USERS - Help, throw me a bone !!!!

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