Here is my HOWTO for Futaba 7c and GV-1 with fixed RPMs assigned
to the Normal, IdleUp1 and IdleUp2 conditions ( no governor on/off
due to lack of another free channel on the 7C ):
Before connecting the GV-1 at all, I connected the throttle servo
directly to the Rx, no GV-1 - and then I have set the ATV, direction,
throttle cut, and setup the TX Throttle curves to have
roughly the desired RPM set by throttle curves in all three IdleUps.
Then on my 7C I have channel 7 assigned to switch E (Idle-ups)
(in the TX PARAMETER menu ) and made it Reversed (Reverse menu).
Channel 7 End Points remain at default 100.
Next, without any changes in Throttle curves, throttle servo ATV etc.
I just plugged the GV-1 as below, then set the Throttle servo
limits ( "Lmt" GV-1 function ) and set-up the parameters as follows:
Here is my Rx to GV-1 and servo cabling:
The channel 7 on the Rx connects to the "AUX (rpm)" cable from GV-1,
while Rx channel 3 connects to "CH3 (THRO)" and the throttle servo
goes to the GV-1 THROTTLE socket. The "MIXTURE" and "AUX (on/off)"
GV-1 ports remain not connected (when I will move to my new 8FG,
I am going to assign another switch/channel to the "AUX (on/off)" port).
Next power-on the Tx and the heli Rx and click GV-1 FUNC+ button twice
and you should see the S1 rpm ( if your Tx idleup switch is in "Normal"
position ) and you can change it with " + DATA - " buttons.
Flip the E switch to IdleUp 1 or 2 and the GV-1 display
should change to S2 and S3, respectively. In each of these S1/2/3
modes - set the RPM with " + DATA - " buttons.
Click + FUNC until you see GRt and set the correct rotor gear ratio.
I did not touch any GV-1 options starting with "M" - as they refer
to the Mixture trim/mix, which I am not using at all.
Other settings on my GV-1 ( at this moment I do not remember
which I needed to change from default ) are as follows:
I am too lazy ;-) at the moment to check what these settings are for
in the manual ( I have set this up months ago ), but with the above
I am getting the three fixed RPM speeds set on the GV-1
and assigned to the IdleUp switch on the Tx. In the "Normal"
mode the GV-1 remains off for the bottom 15% of the throttle range.
On IdleUp1 and IdleUp2 it remains on at all time.
Now, after all that I have three fixed RPM values ( with the bonus
of not having to to buy a tacho and have someone measure rpm for me )
on the IdleUp switch - and in case the sensor or magnet breaks,
I still have the manually set throttle curves, so my heli
hopefully will not explode from overspeeding if the GV-1 gives up.
Hope that helps,