Align GP750 Gyro Setup

[juacas82]

Hey Jasmine....

I did what you said and it didnt work....

Now, I know the Led on the gyro has to be always on Green, mine changed to red I dont know how but it did....The only way I found to change it back to green is changing the gryro sensitivity to less than CERO.

My settings at the moment are:

Gyro is in NOR.

Gyro sensitivity on positive 30

As I said, I changed it to negative and the Led changes to green, Im pretty sure this isn't right...

Would you pls tell me any tip to fix it. Th

[jasmine2501]

@juacas82 The LED on the gyro during programming indicates which setting you have chosen. If you reversed anything in the radio, change it back, that's not the reverse I'm talking about. The reverse you need is the "direction" setting of the gyro itself, which can be normal or reverse. When the tail moves, the gyro should push against that. You should be able to see if the blades react the right direction when you move the tail by hand, motor off, helicopter on.

[jasmine2501]

@juacas82 The LED on the gyro *during operation* should be green, indicating heading hold mode. During programming though, it needs to be the correct color for the setting you are making, which is all shown in the video.

[juacas82]

hey bro...very good video...but My heli keeps spinig to the right, I have read the whole manual, and it says that flying with a gyro on reverese the heli woul spin without control...well my one is spining, no matter what I do....Any advices???

[jasmine2501]

@juacas82 Change the reversing *on the gyro* not in the radio. It's the second or third option - direction, normal or reverse. Change it from whatever it is now.

[Captan6pack]

excellent video. this is the last part of my build....and i have been scratching my head trying to assign gyro sens to gear. So basically what your saying is i dont have too..I can leave my gyro sens with my "ruddr d/r" switch, when i take off throttle hold (rudder d/r) switch it automaticaly goes into 70%. So i guess im good......or mabey not. I hate being new to this. Please correct me if im wrong. Iv spent so much time on this 450pro, and it feels like it will never be airborne.

Tom

[jasmine2501]

@Captan6pack I guess I'm not really sure what you're asking. Personally, I always fly in heading hold mode, so I only ever use one gain value, so whatever you can do to produce that value on the gear channel, that's what you can do. I don't know what radio you are using, but you just do it however you can and it should work.

[georgesjunglerc]

Great instructional video! Wonderful job. Thanks for sharing.

[o0dekker0o]

thank you, very easy to set up.

[glenncol]

Shit dude you sound very whiney

[raymondx1232]

You can Use sub trim ont the Tail . the Trex 450 pro has a staysionery Tail servo that you can not slid on the tail boom. you can see Bob Whight with the Trex 450 pro with the GP750 Gyro on heli Freak Useing subtrim on the tail .

[jasmine2501]

@raymondx1232 Probly shoulda read the comments before saying that, AGAIN :)

I'm well aware of what is possible, but it isn't advisable - it leads to a whole bunch of problems down the road, and some of them can be safety issues. It is best to do it without subtrim - possible to do it with subtrim, but the things you have to watch out for are too complicated to explain in a short video. So it's easier to just say don't do it. Can't believe I have to explain that again.

[MrMrwilem]

jasmine, sorry you have to put up with such bs from kids...thanks for sharing.

[matijipi]

cut ur nails pleaase

[jasmine2501]

@matijipi ARE YOU GAY ENOUGH? To give me fashion advice? Well, are you?

[10fantic]

U know thanks alot for this tutorial,it helped me alot:) mostly to help me make a decesion on what gyro to buy!! But I have one question:) When was that last time u cut your finger nails????

[easydoz1]

I am soo very glad u explained this. Thanks

Tech help at xheli. Failed to clarify it for me

[RotorHead2652]

you should allways allways allways set both your gains up so that they add up to 100 ALLWAYS

[jasmine2501]

@RotorHead2652 Not sure where you heard that, but it's incorrect. The gain values can be whatever you want. Some radios allow you to set more than two, and when flying I'm usually only using one setting. I use heading hold mode exclusively, and the gain gets set at whatever it needs to be for each head speed.

[AmericasFullOfIdiots]

Great video, I have been pulling my hair out trying to work out what I was doing wrong with my setup and all it was is my gain settings were below 50%. Many thanks.

[skidpatrol]

Hi,

Can you please let me know if these gyro's can have the piroete rate

set through the dual rates for all conditions as with the 611.

Thanks.

[jasmine2501]

@skidpatrol You can reduce the piro rate using the dual rates or adjustable travel on your rudder channel. However, you can not set an absolute piro rate in degrees per second, as you can with the high end gyros.

[Golgafrinchamdent]

@jasmine2501 Hi Jasmine and thanks for making these vids! I don't understand most of it yet but I'm learning. One thing though... as someone who flys ( sim ) mostly piro moves, an inconsistant piro rate can really throw a wrench into the works. A piro change during a p-funnel knocks me out of sync with cyclic stir w/ no time to correct. Can you suggest a gyro for 250, 450 sizes which can set an absolute deg/sec piro rate? I just got a Spartan DS760... would that do the trick? Thanks much!

[jasmine2501]

@Golgafrinchamdent I think the Spartan can be set like that, possible the GY520 too... but you'll have to check.

[wasimwazir]

finless bob who is a pro at building all types of helis says its ok tosub trim the tail servo

[jasmine2501]

@wasimwazir Yeah I'm well aware of Finless Bob's recommendations for setting up gyros, but he has not done a video about the GP 750, and it works different from the GY 401 - not all gyros are the same. On the forums, we get a lot of people having problems related to entering trim and/or sub-trim on the rudder channel, so, while not technically correct, it is easiest to avoid using trim and sub-trim on the tail - and if you do things right, it's not necessary either.

[thatonebeone]

Still new but will this be similar to setting up my 780GP on my pro? Thanks for the vid

[jasmine2501]

@thatonebeone I don't have a 780 so I can't be sure, but it seems similar.

[jabbaba]

ha ha, just got one of these suckers off ebay and thought why not learn on youtube how to set it up. first time i ever knew of a woman into these serious boys toys. chick with a dick???? nah, a chick with a chopper!!! thanks for vid.

[1961westy]

there is so much to learn and it can be a bit daunting but it is great fun and i luv it, just wish i was as switched on as you

[1961westy]

awesome Jasmine, a lady that knows and loves rc heli's,but it is still confusing for me. P.S. will you marry me

[jasmine2501]

@1961westy No I tried the marriage thing once and it was not a good thing. These helis can be confusing, but they are logical, well-defined systems, so if anything doesn't make sense, read until you figure it out. There is a reason for everything we do - you just have to find what it is :)

[FlyGuyRc]

I have a huge problem, I am using the gp750 on my blade 400, I setup the gyro for a 450 heli, but when I do an input, the servo will move all the way the the left( or right, whatever way I moved the stick) but when I centre the stick, the servo does not move back with my stick, it just stays in that position, and vice versa, so when I spool up the heli it just sping like crazy till I change directions, then it spins like crazy the opposite direction!!! Have I odne somehting wrong? Thanks.

[jasmine2501]

@FlyGuyRc Well the servo sticking to one side is normal for a heading holder gyro. The spinning is because you have the direction reversed - not in the radio, but in the gyro itself. Direction is the 3rd setting on the gyro. Check the rudder stick reaction too before you get off the ground, because you might have to reverse that too, but it sounds like not.

[FlyGuyRc]

Thanks for the reply, but its not reversed, it will do what I say, but not center again like it should. this is what its not doing: when you are setting up the limit you will notice that the servo will actually move WITH you control inputs, thats what mine is not doing, mine moves with the input, but when the stick goes back to center, the servo doesnt follow.

[jasmine2501]

@FlyGuyRc If direction is set to NOR and the helicopter spins out like crazy, then the direction needs to be set to REV, or vice versa - it is correcting the wrong way and making the spinning worse instead of stopping it.

[jasmine2501]

@FlyGuyRc

The other thing is normal, I promise. When you push the stick and the helicopter doesn't move, the gyro doesn't understand why, so it "tries harder" eventually moving the servo all the way to one side. When you let go of the stick, and the helicopter isn't moving, the gyro thinks everything is perfect because the commanded piro rate (zero) equals actual piro rate (zero), and it won't move the servo in that case, even if it's all the way to one side. This is how the heading hold works.

[FlyGuyRc]

No, its not reversed as it will move whatever way I want it to, but as I said before, the servo will only follow my stick input until I center the stick, then the servo does not move back with the stick, instead it just stays huugging one side therefore creating huge amounts of pitch. If what you said before means that it wont do anything properly till I take it off the ground, thats not the case, because I spooled it up till the heli was light enough

[FlyGuyRc]

and it was still spinning like crazy and the gyro didnt detect that so it didnt compensate for the spinning, I have no idea whats wrong! lol thnaks for the help tho

[FlyGuyRc]

THANK YOU JASMINE!!!!!!!! I iddnt think to reverse the gyro cuz i thought that it would have reversed the serrvo, but it fixed the problem :D:D:D THANKS YOU!!!!!!

[jasmine2501]

Oh that's good... sometimes it's hard to explain, but I guess you got it.

[98CiViC0301]

i just bought a used feda dragonfly and when i give it throttle it spins to the counter clockwise i have the trim alway to the right also to prevent it but its not enough it still spins. is anything wrong or am i doin something wrong?

[jasmine2501]

Counter-clockwise can mean that the tail isn't giving enough thrust - this can be caused by many different issues, such as belt slipping or tail blades mounted wrong. It also can be the gyro is reversed. I am not familiar with the helicopter you're asking about, but those are some things to check.

[jasmine2501]

Oh wait... you are talking about a fixed-pitch helicopter with a motorized tail. This video is about a gyro, used on collective pitch helicopters with belt or shaft driven tails. On your motorized tail, there's a number of issues which can cause the tail not to spin fast enough - bad motor, gear slipping, bad setting on the mixer, low battery power...

[98CiViC0301]

whats the mixer and how would i set it? also thank you very much for helping me i appreciate it

[jasmine2501]

Well the mixer is where the motors plug in to. There should be two screws to adjust things. I'm not sure on that helicopter though. Try going to RCGroups and ask a question in the Beginner electric helis area. I would say try reading the manual but it's probably in Chinese :)

[SPAGHETTIMONSTER1]

in a year and a half "you are" the first person to answer the drift and wag, in a vid, that i have seen, very cool. nice tidbit of info there. that tidbit will help a lot of people. p.s. the rest was good too

[tonyastro]

Sorry noob question. If you shouldn't use rudder subtrim how do you adjust for slight spinning?

[jasmine2501]

You center the pitch slider with mechanical adjustments, and the heading hold software takes care of the rest. If you use sub-trim the gyro will think you moved the stick off-center, and it will actually cause a slow tail drift and other random behavior. You can use it in certain cases, but it's too tricky to explain how, and it's easier, and correct, to just keep everything zeroed.

[tonyastro]

Thanks a lot!

[kl8966Q]

hi, jasmine2501.

i used e325 mini titan now, how to set delay?

[jasmine2501]

I think that one is still considered a small heli - but you should probably check it both ways and see what makes it fly better.

[kl8966Q]

@jasmine2501

ok..  thanks :)

[shield400]

Outstanding Jasmine! I had no idea the servo horn had that much effect on the gyros performance. I learned something new today, thank you so much.

Love your videos thank you for taking the time to make them, they truly are helpful. 5*****

[jasmine2501]

Oh yeah, the servo horn length is the mechanical gain - too long is like having lots of gain, and you lose precision too.

[tonyastro]

Thanks for the tutorial. This was a huge help

[zupin000]

hmm...

I didn't mentioned that all components are new...

I have just tried to connect rudder servo directly to receiver, still nothing, tried different channel - nothing. I supposed servo is a problem... but perhaps there is more than one problem??!

[jasmine2501]

New parts can have problems. The DS420 servo is known for burning out. Sounds like maybe you need a different one. I don't use the one I got with my T-250 - switched it for a JR DS290G. For a 400-class heli, I think really a bigger servo is appropriate - I use a JR DS3400G on mine.

[zupin000]

Hi Jasmine,

Nice vid. thanx.

Does anyone know what could be wrong here: I have align 450 sport (super combo), dx6i, gp750. Cyclic is ok, work great, but the tail servo doesn't move. After minute or two, all three cyclic servos starts moving, without touching sticks.

[jasmine2501]

@zupin000 - sounds like a problem with the receiver, or the ESC.

[Starsandstripesofcor]

so if the gyro servo does not center after moving rudder stick would that mean something is wrong ?

[jasmine2501]

The servo will not center in heading hold mode. Only in rate mode will it actually center. You don't control the servo directly - the gyro puts the servo wherever it feels is necessary.

[Starsandstripesofcor]

sorry if my comments appear several times my pc is hooped

[jasmine2501]

Happens all the time. Youtube was acting funky today.

[joshuajk7919]

Dont get your panties in a knot Jasmine! i was making a comment on the guy that said you CAN use subtrim!

[jasmine2501]

Oh I'm sorry... I was having a pretty bad day. I should just not respond to things when I have a migraine and the Vicodin isn't working! Sorry :)

[Tagbart]

Thank you! This was much helpful. Greatings from Norway!

[CrayLuv]

Thanks. That was very well explaind. I am in the middle of building a trex 450 right now with that gyro. I am in the middle of tail setup and adjusting the settings on the gyro. Thanks!

[MavrikkSF]

Subtrim has no effect on the way the gyro works whatsoever - it's perfectly fine to center your servo sub-trimming it!

[jasmine2501]

Sub-trim sends an off-center signal to the gyro. The gyro can not tell if this signal is being sent by sub-trim, or if the pilot has moved the stick off-center. Some gyros, like the GY401, will reset the center when they are powered up, and it's ok to use sub-trim in that case, as long as you re-bind your receiver so the gyro gets that off-center signal right away on power-up. This is covered in the GY401 manual - but this video is not about the GY401.

[joshuajk7919]

with expert knowledge such as this, whats the point in vids like this! you plonker lol

[jasmine2501]

Instead of being a sarcastic jerk, why don't you go try it. Put in sub-trim and watch the tail drift. Then re-bind and see if it fixes it. With the GY401, re-binding will fix the issue - the gyro re-calibrates to the subtrimmed position.

[sweetdrtn]

I've seen some other gyros say, "Don't use gain settings between 49-51 as it may cause the heli to become unpredictable." I'm betting this align gyro works the same way which is why it exibits that behavior at 51% gain. Thanks for taking the time to post this. :)

[jasmine2501]

Yeah it's kinda weird. The GY401 doesn't do that, but it would be stupid low gain anyway, and probably worthless.

[sweetdrtn]

Indeed, anything that low and you'd probably want to rethink the physical setup of the machine. Make the arm shorter or longer to get it in a more acceptable range.

[Duxasblt]

nice, i REALY needed to find out moar 'bout these gyro thingys,

BTW your either a big big biiiig geek or a homo....

[jasmine2501]

Well take a minute and think about what kind of people might be interested in this hobby...

[Duxasblt]

NO! Your doing it wrong, thats not how you insult a man gei boy. And if you trying to say that this is a homo hobie than your dead wrong, i hawe a gf, FUCK YEAH i had 3, whats your achievement? Night elf at WoW? Elf in Lineage, come on nerd its OoooON >:]

[jasmine2501]

Way to take that the wrong way... nicely done :)

[Duxasblt]

no way.. o.O

[eatingjif]

jasmine is a girl aswell

nt a guy

[foxbearCH]

BTW: I do have the GY401 upsidedown and also 180° opposite to how i have it installed on my Protos - that should not be a problem, right?

Thank you so much for your help, i could not find any post in any forum that can help, so fare.

So THANKS!

Br

foxbearCH

[jasmine2501]

It is fine as long as you set the reversing correctly.

[foxbearCH]

yes, i did.

well, yesterday night i installed a Microheli Tail-Set, checked the rod on binding and went from 7mm to 5mm.

Tonight i will test.

Looks fine whitout motor when pushing the tail around, but i realy hope for success tonight. Otherwise i have to let a Pro check it.

[foxbearCH]

Thanks. Will check on all, maybe find it in one of what you mention.

Yet, still there is another strange thing going on: while the ESC is initialising at startup, each Biptone has a simultanious move of the 9257. Some kind of impulse is getting straight through. So i wonder if any electronic device has a defect or is it interfernce between 2 of them due to the thight space!?

[jasmine2501]

Back off the voltage to 5.5... the servo may not be able to handle 6. I run a BEC on my 250 now, so I don't have any issues like that - still run 5.5V though.

[foxbearCH]

that should not be a problem, cause i have a stepdown converter installed.

but thx

[foxbearCH]

part 2: It does not move much till a certain point and than it spins like hell in an instant (i have my 250 attached to a turntable). No matter how i set up my radio (DX7), i tried so many ways, it will not work. I guess i have the wrong distance from Balllink to Servocenter. I can not find this info in the Manual. What distance is yours? Or do you have any idea what might be the problem? Little frustrated here. Thanks for ANY help in advance! Br foxbearCH

[jasmine2501]

Should be 5mm servo arm for the tail. 9257 servo is over-kill for this helicopter - the DS420 actually works just fine, as will the DS290G - bigger servos will just make it tail-heavy and do not really give any advantage. Sounds like you've just got too much servo arm though - many people do use the 9257 and it works, but IMO it's just too big for this helicopter. 9257 is so strong that it can actually hide a problem with the tail hub - make sure you have the new single-bearing tail hub.

[jasmine2501]

Also make sure all of your tail linkage is moving smoothly, and is straight as you can get it. Make sure it isn't binding in the hole in the guide - you can open up that hole a little bit and it will help. Check the ball links on both ends and make sure they are smooth moving and the rod isn't going too far in and hitting the ball.

[foxbearCH]

Hi Jasmine

Thanks for all the helpfull vids and time spend to create them!

I build my 250 and instead of the 750/420 combination i installed GY401/Futaba9257.

I do have the same on my Protos 500, working just fine.

On the 250 allthough i can't get them setup. Programming almost like for the Protos, but:

HH-Mode is on, but its more like beating from left to right side. In standartmode it stays centered, but as soon as i move the rudderstick there is no smooth turning possible.

end part 1

[jasmine2501]

Tail wag is a sign of too much gain. It can be a mechanical issue, because a longer servo arm is same thing as increasing the gain. Servo arm should be 5mm at the most.

[adrianTNT]

Jasmine, can you help me a bit please?

I have Spektrum DX6i and T-rex 450 SE.

I dont know if I have to reverse any of the 3 gyros in front, the way I see it moved it has an inverted move when I go left/right.

I am lost :) Do you know where I should look for help about this?

[jasmine2501]

Go watch my radio setup video. It explains a procedure for getting the reversing and the swash mixing all correct. Basically, you do the reversing first and get the collective to move all three together, then do the mixing so things go in the right directions.

[adrianTNT]

Now I set the 3 to move all together up/down, but when I use the other stick to lean left/right the swashplate leans in oposite direction of the stick, is that normal?

[jasmine2501]

That's probably wrong, you fix that with swash mixing. Seriously, go watch my radio setup video, it makes it all clear.

[adrianTNT]

That video did help. I fixed it.

It needed reverse in swashmix from +60 to -60 for the servos that ware reversed in order to move at once.

[adrianTNT]

I have one more :s , do you know what to change if the blades are not rotated enough in order to lift? With throtle stick in top blades are just paralel to the ground and with stick lower they do rotate much (like for decreasing altitude)

Do I have to unscrew and rotate the blades holders at the very top of the heli? That part came mounted so I dont know ...

Thanks for the help and videos.

[jasmine2501]

Something is mechanically set up wrong, or the servos weren't centered correctly. Please go to helifreak web site and find the correct area for your helicopter and post a question and see if people can help you. Pictures and a specific description of the problem will really help.

[adrianTNT]

When you set the limit and move your stick ... is it normal to show green on one end and red on the other end?

Thanks.

[jasmine2501]

I think so yes. Seems to do that in all programming modes.

[decameur]

Hi Jasmine, tanks a lot for this vids, they help a lot to me be cause I'm a beginer, could you recomend me link or something were I can understand what gain, sensitivity, etc. of the gyro means, I really apreciate, thanks again

[rcheliaksy2002]

Hi..

Thanks for the effort and great video.

After programming, I reduced my gain to rate mode and did my mechanical adjustments. Then I turned of rx. With tx still on, I increased gain to HH mode. Is this correct?

[jasmine2501]

Yeah that's a good way to do it. Just make sure to re-initialize and check everything once again before you fly. Actually... check it every time you fly, just while you spool up, make sure it's going the right way, then take off :)

When I made this video, I reversed something and when I went to fly again, the rudder was backwards, so it's a good thing I check it every time!

[rcheliaksy2002]

Hi Jasmine,

Many Thanks...One more thing..when I stuck the gyro on my frame, it is 90 degrees to the main shaft. However I noticed when I look from the top or bottom , it is slightly tilted to the right. Will that in any way create any problem?

[jasmine2501]

That should be fine. Mine is a little crooked too :)

[rcheliaksy2002]

Ok thanks for your replies.

Much appreciated.

[legine3]

when you were setting the limit, were you in rate mode or HH? because if you were in HH wouldnt the servo just keep moving even if you only give a small input? where as in rate mode the servo only moves according to your stick inputs.

Thanks for the vid

[jasmine2501]

When you set the limit, you're in programming mode and it moves the servo so you can see where you're at. Doesn't matter what the gain is on - programming modes do what you need it to do.

[rdobosz]

I tried this w/ my dx6i, and it doesnt work. i set the gain to around 70, the servo does weird things like slowly move to full left. when i set to normal mode set around 33 it works but but sometimes it starts wagging whenever i hit high throttle.

in the gyro settings on the dx6i it seems to only work when i set the gyro to ihn (disabled) ive seen other people comment on this too, is there a reason it wont work with a dx6i?

i set all the travel adjustments on the tx and programed the gp750

[jasmine2501]

The DX6i is a little different, but the issue with the servo moving to full extremes is actually normal heading hold behavior. When the helicopter is sitting still and does not react to servo movements, the heading hold gyro doesn't understand what is happening, and it continues to move the servo until it senses the tail swinging around like it's supposed to. The only way to test a heading hold gyro is to actually fly the thing.

[acrmorris]

It is this kind of post that make the internet such a fantastic tool. Thanks Jasmine2501 for taking the time to add an excellent and highly informative series to the site. I should be getting my 250 in a couple of days now and will be refering to these vids during the build. Can't wait to get the little guy airborne!

[jasmine2501]

Thanks! Good luck with it! Tricky little bird, but very fun to fly :)

[StonyRC]

Hi Jasmine, this is the first of your videos I've watched. Very nicely done & really informative. It's so helpful for us heli noobs to get advice from more experienced heli-folk. Thanks & keep up the good work.

[LloydGod]

Last night as I was about to setup the gyro my esc just stops working!!! One minute it's all systems go!, then it's like the esc just switched off... forever.

I setup the esc as per the manual, and double checked my settings before use. Guess I got a bad one.

Trying to get a replacement today so I can finally fly this little bird.

Oh yeah and thanks for all the helpful build videos.

[jasmine2501]

There are some reports of bad tail servos that pull too much juice and fry the ESC. Also one report of a bad ESC... call your dealer and see if they can replace the bad parts for you. It is worth it to get this little thing going :)

[paxi111]

Very good description.

[paxi111]

FAJNA OPIS POLECAM !! ;)

[jasmine2501]

WTF?!

[sanyusanyu]

thanks for the video. good instruction. I mount the gyro the same way as you do on my Trex 500. It needs to be reversed right?

[jasmine2501]

possibly - it depends on the servo and other factors. Put it in heading hold mode and swing the tail and see if it pitches the blades against your action. If you push the rudder to the right, the tail blades should 'push' - making the helicopter move to the right. If not, reverse the rudder channel. Then, swing the helicopter nose-left, and the gyro should push the blades the same way.

[JMULIKOW]

mulikow wuz here

[psindrup]

Jasmine

Excellent video - once again. :-)

Peter