mcfast

Hi Guys

I installed a Robird G31 on a T-REX 450 clone and from what I can see when using a separate RX (Pwm) you lose a few options like infliet Ail Gain and Ele Gain adj, also you cant use the supplied RPM sensor because all the slots on the G31 are full, I tried using the Ppm set-up and cant get anything to work I do not know why? using my Hitec Aurora 9 TX a FrSky Minima 8CH RX, it works on all my other RC stuff. any ides?

I do not do any 3D so I do not need the +12-12, so can I go in my TX and ajd the
Pitch Curve and Throttle Curve to my liking ?

Any help would be great Thanks

Zor

Hello mcfast,

I think I am one of 'the guys' and hate to see you without any response.
At least you know somone cares.

I am also new in helicopters but hava done some studies and my understanding is that the command signals from a receiver to the servos are all identical so that any servos can be used with any receiver. This same signals would be presented to the G31 that feeds the servos. I do not see why that would not work.

Adjusting the Pitch Curve and Throttle Curve simply adjusts the timing of the pulses leading edge ( PPM ) or their duration ( PWM ) in relation to the transmitter stick position depending on the modulation type being used. Perhaps you may check the modulation type your transmitter is capable of and change it and see what happens.

Hope someone shows up with more or better information for you.

Zor

etpompea

mcfast,

There is a Robird support forum on Helifreak, under R/C Electronics support. The US factory support guy is on there all the time. Someone there should be able to help you.

mcfast

I don't think its a Robird problem, but a cheap HK heli problem !, I did upgrade the head to a CopterX FBL and maingear, but the rest is still HK, I did install Corona DS-929MG servos, could be the servos to, I will keep looking, I don't give up easy.

mcfast

Does any buddy know ho makes RXs with ppm output for JR and Futaba.

Zor

mcfast,

I wonder why you ask and I do not know if anyone does.

To my knowledge all servos need PWM .

Zor

mcfast

Well, its because with PPM mode all channels come out with only one wire, so a lot lees wiring and the Roird G31 has that option for input and it gives me all the options that I can use, like inflite gains with TX and governor, with does not work with regular set-up

Zor

Hi mcfast,

I regret not being able to understand. I guess I stand to learn comething new to me.

In the usual case servos get their power via a bus at the output connectors of the receiver.
The servos can also get their power directly from the battery through a switch that also energize the receiver.

Of course the servos also must have a signal wire with a common connection to the battery.
I do not understand what the PPM mode has to do with this.
I still understand that the signal wire has to carry a PWM signal.

I wish you can explain. I am always open to new knowledge.

Thanks,

Zor

mcfast

Try reading this it mite help

http://www.endurance-rc.com/ppmtut.php

Zor

mcfast,

No help in your posted link.
It does not show the variations in PWM not the variations in the PPM.

I am not surprised of your misunderstanding if it is based on such reading of this link.

Note that the first illustration does not show a Pulse Width variation.
Note that the second illustration does not show a Pulse Position variation.

Zor

mcfast

Too bad bye !

Zor

mcfast,

Only one other person in one post tried to help you.

I think you are correct in saying "bye".

Best to you and good success with your activities.

Zor

babyhuey

You have to use either the S bus Futaba RX or the Spectrum satellites with the G31 to be able to use the governor option.

Hope that helps!

mcfast

I know, I was looking to buy a used Futaba 8FG Super, theres I guy near here selling one for for $250.00, I think thats a good deal !

babyhuey

Doesn't Hitec have a PPM RX?

mcfast

Nop !

babyhuey

Yeah, that sux. I am still running old school Futaba FM and using a full RX. It seems that all of the cool toys are for Spectrum and 2.4 Futaba. It's pretty cool how you can run the G31 with Spectrum satellites alone. Almost enough to make me change!

mcfast

Me to, I like the satellites alone set-up, but I am not crazy about the low end-end Spectrum TXs, a 9 would be nice, but over my budget