Hi all !!! has anybody tried to use the 401 on the axe yet. I have changed crystals and have it loaded onto my 9z but not sure yet how the get 401 into hh mode . I guess my question is what is the orange signal wire for on the 3-1 that is pluged into ch 5 on the rx.


Thanks for any help

Tom

The orange wire controls the tail rotor. For the 401 to work in HH mode it needs two dedicated channels. I've heard it won't work correctly with the O.E. Tx and Rx.

Shouldn't that orange wire going to the 3-1 be connected to the signal wire comming FROM the Gyro? This is what tells the 3-1 how much "power" to give the tail motor.

Your right Pilotlight, but he didn't ask where it goes. He asked what it was for.

The single wire from the gyro has to be plugged in or the 401 won't init in HH mode and won't work correctly.

I think we're talking about 2 orange signal wires here. The manual for the GY 401 is in black and white so its impossible to tell if the signal wire on the gyro is orange.

The 3-1 is either plugged into the rudder channel in the stock setup (which I don't believe is channel 5) or plugged into the GY 401 rudder servo OUT's signal post when using the GY 401 to drive the 3-1.

The signal wire for the gyro IS plugged into channel 5 if your 9Z if it has a rotary dial for that channel. This adjusts the "gain" of the gyro. One direction is Heading Hold mode, and the other is Rate mode. If it is left in the middle, it might not initialize because gain is set to zero.

Its actually green. It wont initialize if the SINGLE wire from the gyro isn't plugged into a channel with adjustable end points AND the switch is set to Heading Hold.

hi all sorry if i caused any confusion with my question. first the gain signal wire on the 401 is yellow and i know it has to be connected to a channel to get the 401 into hh mode. I am trying to figure out what the orange wire that is from the 3-1 actually does so i can decide what to do with it. i will try it with out the orange wire hooked up and the gyro signal in the ch 5 slot. I am assuming that the order of channels in the oem rx are the same as futaba because all other functions work as of now. . the servos are in 1-2-6 and the 3-1 is in 3 and the main gyro plug is in 4. I know that i have to put the switching (yellow ) wire in 5 but am wondering what to do with the orange wire from the 3-1 which i assume is the signal imput for tail speed.

the main reason i am doing this is i had a 401 and didnt want to buy a 240 if i didnt have to . I also like to tinker i guess. Thanks for any help you can provide

Tom

Are you still using the 3-1 or did you buy a separate esc to drive the tail motor?

i still have the 3-1 hooked up as described from helimax and i am using a seperate esc for the tail motor. I did everything that the helimax hop-up instructions say to do . i just need to figure out how to get my 401 into hh while still trying to not totally lose the tail mixing from the 3-1 if that is possible. tom

Tom,

I don't think you understand that you don't need any mixing because the 401 gyro will do it for you now. The only thing the 3-1 will do now is act like an ESC for the main motor. There shouldn't be anything connected to the wires coming OUT of the 3-1 that previously went to the tail motor.

Got any pictures of what you need explained?

Looking back at what you wrote, the orange wire is no longer needed from the 3-1. You want to know what to do with it, remove it.(or cover it with electical tape)

I see that there are a few threads now talking about the GY401 on the Axe CP. I too ordered a 401 and mini-ESC, however, I have not done anything to it yet in regards to unpacking and installing. I picked it up thinking that I would be able to have a more functional Gyro that I can then move to a different copter in the future, however I never thought that it would be incompatible with this OE copter.

I noticed in that other thread that there was a statement that one might be able to throw a POT in the signal path to manually adjust the gain. If this makes sense, then what kind of resistance (Ohms) are we looking at?

A pot wont cut it, it needs a signal on that wire from between 1 to 2 ms in length and timed properly.

Hi all I got it to work by using a y harness for channel 5 and pluged them both into the channel . so far it is working fine. I have been told there is a way to do this without the seperate speed control. I hope to get the info soon and will post here when i get it

Tom

With the 401 and a programmable transmitter, you can skip the tail ESC hack from HeliMax. You can NOT use the 401 without the Y-Cable and brushed ESC unless you can program the channel 5 (gyro gain) on your transmitter.

You can read more on Gyro hacks for the AXE at:

http://www.rcgroups.com/forums/showt...=645063&page=2

Make sure you read my long (compiled information) post on page 2 of that thread if you wish to attempt this...

Dave

here is another guy on rc groups that has ideas for the 401 with out adding a esc for the tail.

http://www.rcgroups.com/forums/showt...ghlight=eeeeky

I will read and try what works

Tom

I did this mod, it works but the gyro has trouble initializing. I have to arm it 5-10 times before it initializes, major pain in the arse, but when it holds the tail is solid and makes it sooo much easier to fly. I wish there was a way to get it to work on the first try. Any suggestions?[]