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HomeAircraftHelicopterFlybarless Rotor Head SystemsSpektrum › Spektrum AR7200BX
03-06-2012 09:49 PM  6 years agoPost 41
j5coat

rrVeteran

Phoenix

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setup 2 of these, one for myself on a trex 500 and one for a friend on his 600n both working great, using 3m tape. Had to change the gyro gain the the parameters menu to low from medium ( had some tail wag ) on both helis, and also had to bump up the pitch boost ( quick stops lag a little ) but now it flies just like my regular beast does with the default parameters.

Trex 700, Trex 600n

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08-04-2012 08:31 PM  5 years agoPost 42
matthewcornell

rrNovice

Amherst, MA

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Thanks for this, guys. I just put an AR7200BX in my new T-Rex 500EFL Pro (sweet) and I was confused about versions, compatibility, etc. Now I know a) HorizonHobby v3.0.0 = BeastX v3.0.8 (Q: Where did you learn this?), and b) we must wait for HH to create their own updating software; BX can't be used. Regarding the dongle, I wish I could just plug it directly into my USB port on my laptop :-(

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08-05-2012 12:05 AM  5 years agoPost 43
RAK402

rrElite Veteran

Alhambra, CA

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I am flying one in the TracX 600E (shown in a post on the first page of this thread.

I also got one in the Blade 300X.

I just installed a third one of these in a Trex 550E I got from a friend (now a TracX 550E as I have upgraded it to the Compass head at the same time).

All three AR7200BX's work very well!

Team KBDD/Compass Team Manger/Experience RC/Team JR Americas/WR Field Rep

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02-28-2013 05:04 AM  5 years agoPost 44
dkshema

rrMaster

Cedar Rapids, IA

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This is a reply to an older post, but with new info. If you have an AR7200BX and are itching to use it with your X9303 or X9503 transmitter, you will have a real problem on your hands as it will appear that you can't control the tail Gyro Gain from the X9303/9503.

Further, if you are flying a nitro heli and want to hook up a governor, you think you're really out of luck if you have the X9303/X9503.

Though you might think the TX and RX are incompatible (and if you look back up this thread a bit), you'll see that I noted the AR7200BX won't work properly with the X9303/X9503. This post corrects that notion.

-----

The root of the problem is that your 9303/9503 Governor menu assumes Channel 5 is connected to the Governor, and the Flight Mode switch selects the RPM settings.

The second part of the problem is that when you enable the Gyro Sense menu, and select "AUTO" to slave it to the Flight Mode switch, the 9303/9503 expects a gyro gain lead to be plugged into Channel 7 of the RX.

The AR7200BX is hard-wired to expect to see a GYRO gain control coming out of Channel 5, and you would plug an external Governor into Channel 7 to control the RPM. It appears the wrong channels are controlling the wrong sensor.

Since the 9303/9503 are going to control a governor on channel 5, and the AR7200BX uses channel 5 for Gyro gain, it appears you won't be able to control the gyro gain.

Since the 9303/9503 are going to control a Gyro on channel 7, and an external Governor is to be plugged in to channel 7, it appears that you won't be able control the governor correctly, either.

-----

Well, as it turns out, you can successfully control the AR7200BX built-in Gyro AND an external Governor plugged into the RX channel 7 using your X9303/X9503.

The key is to realize that you will simply use the 9303/9503 GOVERNOR menu to control GYRO gain, and you will use the GYRO SENSE menu to control the GOVERNOR RPM.

-----

To do so -- in the 9303/9503 DEVICE SEL menu you will see that the GEAR setting has three options: INH, ACT, and GOV. SELECT "GOV". When you do so, a new option shows up in the Function List menu called "GOVERNOR".

Next, find the GYRO SENSE menu in the Function list, and set it to "AUTO".

The two previous steps enable your TX to control the output of channel 5 AND the output of channel 7 by the position of the Flight Mode switch.

-----

The AR7200BX will interpret the Governor settings as Gyro Gain settings. A Governor plugged into channel 7 will interpret the output of channel 7 as its RPM select control.

-----

The GOVERNOR menu will offer three settings -- NORM, ST-1, and ST-2. Each of these settings can hold a value between -100 and +100. (IF you have Throttle Hold enabled, there will be a fourth setting -- HOLD. It, too, can have values between -100 and +100.

For each setting, values between 0 and -100 will put the tail gyro into NORMAL mode, 0 sets a gain of 0, -100 sets a gain of 100%. For values between 0 and +100, you will be in Heading Hold mode, 0 sets 0% gain, +100 sets 100% gain.

You have a unique gain setting for each flight mode.

That is how you use the GOVERNOR settings to control the AR7200BX tail gyro.

-----

With a Governor plugged into channel 7, you use the settings in the Gyro Sense menu to control it.

In the Gyro Sense menu, with it set to AUTO, you will see three settings on the far right side of the screen. Set NORM = POS 0, ST-1 = POS 1, and ST-2 to POS 2. If you have Throttle Hold enabled, you will also have a HOLD setting, and that can be linked to POS 0, POS 1, or POS 2.

The values in the center of the screen -- POS 0, POS 1, and POS 2 will be the values you use to select the desired Governed RPM for each of the flight modes.

These values have a range of 0 to 100, instead of -100 to +100. Set the values for each flight mode to the desired governed RPM.

-----

Once you have set all this up, you can see the results in the TX MONITOR screen.

Flipping the Flight Mode Switch will move the channel 5 slider position (shown with a label of "----" ) and the channel 7 slider position (AUX 2) back and forth, based on the individual settings in the Gyro Sense menu, and the Governor menu.

-----

Just remember that to adjust the GYRO gain of the AR7200BX you need to change the GOVERNOR menu settings. To adjust the Governed RPM, you use the Gyro Sense menu settings.

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If you are using a Rev Max, Throttle Jockey Pro, or a Throttle Max plugged into channel 7, you will need to get it into calibrate mode, and you will need to run the calibration procedure.

In the Gyro Sense menu, set POS 0 = 0, POS 1 = 50, and POS 2 = 100. Make sure you have a linear 0 to 100% throttle curve.

Set the Governor NORM position value to a value where the governor will be disabled.

Go through the BIND process to establish the fail safe setting for throttle, and to establish the fail safe setting for AUX 2, and the fail safe setting for Governor RPM.

This will cause the RX to output the correct signals to the governor and Rev Max/TJ Pro/ThrottleMax while the TX and RX are linking up at power on.

Set the throttle stick to low. After power on, wait for the TX/RX to link up, then toggle the flight mode switch. This should put the RevMax/TJ Pro/Throttle Max unit into calibration mode. Move the throttle setting from low, to high, and back to low. Toggle the Flight mode switch again to exit calibration mode. The limiter/governor should be calibrated and now you should be able to set your desired RPM ranges and gyro gains.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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03-22-2013 10:37 PM  5 years agoPost 45
blade77

rrApprentice

N. Ireland

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AR7200BX software version
I bought this AR7200BX 2nd hand with no box or manual so can anyone tell me what firmware version is this - is it up to the latest version?
When I switch on I get A+B on one side and IJKL on the other side before self check,
seems to work OK on the bench - startup Video below
Can any one tell me what the lights mean?

Watch at YouTube

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03-22-2013 10:50 PM  5 years agoPost 46
TomC

rrKey Veteran

Gold Coast, Queensland, Australia

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All ar7200bx units have the same, latest firmware (equiv to bx ver 3.0).

Lights cycling on startup is normal, then the swash does a little up/down dance and you are good to go. The blue light indicates your tail gyro is in heading hold mode.

Do yourself a big favour and download the spektrum ar7200bx manual and read it. Just google spektrum ar7200bx manual.

Cheers,
TomC

Nqx,Mcpx-BL,300x,450x,500x,550x
Ion-x, 10s ,SS
TT X50E 10s, HC3-Sx

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03-22-2013 11:00 PM  5 years agoPost 47
blade77

rrApprentice

N. Ireland

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Yep just read the manual after download and setting up - the lights are binary I see.My unit also has a small round sticker on the front with 3.1 on it.I was just wondering if I needed to update.

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06-29-2013 09:07 PM  5 years agoPost 48
hpilotrc

rrVeteran

NY--->>Mooresville, NC USA 8/2005

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Firmware version on my AR7200BX
My AR7200BX has a sticker with a "7" on it. What version is it?

Also is the serial number on the back of it? I hate to have to remove the unit just to read the serial number!

Michael

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06-29-2013 09:31 PM  5 years agoPost 49
cudaboy_71

rrElite Veteran

sacramento, ca, u.s.

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are you actually trying to find the serial number for some reason, or are you just after the firmware? firmware is indicated by the lights that come on when initialized. IIRC, B only = v2, A and B = v3

if it ain't broke, break it.

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06-29-2013 10:20 PM  5 years agoPost 50
hpilotrc

rrVeteran

NY--->>Mooresville, NC USA 8/2005

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Firmware version and tail revoMIX
The A and B LEDs come on so I guess I have v3...that's good. Thank you for that info...

Serial number is needed to download updates and it looks like it's on the back of the unit. I would need to remove it if I want to get that number

I have the F. Tail-RevoMix set on (red solid) High-Normal direction but if I am in a hover and push the collective all the way up fast the tail moves out due to the torque (nose to the left). I guess I need the computer software and a custom setting? You would think that the unit would compensate for this and keep it where it is but it does not?

My Mikado Mini V-bar has this compensation setting and works fine.

Unit works fine in flight otherwise.

Michael

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06-29-2013 11:06 PM  5 years agoPost 51
NQNA

rrElite Veteran

USA

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Serial number on the back of the unit... Smart

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06-30-2013 12:03 AM  5 years agoPost 52
TomC

rrKey Veteran

Gold Coast, Queensland, Australia

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Firmware version and tail revoMIX

If I were you I'd get rid of any revo-mix's and just use the bx heading hold on the tail. Also, just follow the setup instructions to help get piro-comp set up right (last setup step).

Cheers,
TomC

Nqx,Mcpx-BL,300x,450x,500x,550x
Ion-x, 10s ,SS
TT X50E 10s, HC3-Sx

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06-30-2013 01:16 AM  5 years agoPost 53
cudaboy_71

rrElite Veteran

sacramento, ca, u.s.

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it's not revomix in the traditional sense (the really should not call it that's its confusing to the people that remember setting revo mix in the radio pre-HH gyros). it's a tail precomp. and, it serves a really great purpose. don't turn it off. just make sure you have it set in the correct direction (we're talking about F in the paramenter menu here)

you can tell if you have it going in the right direction by noting which way the rudder adds the precomp when you go from MID STICK to HIGH STICK (Note: it is important that you start at midstick, as the precomp is the opposite direction from low stick to mid stick)

so, assuming a typical clockwise-rotating head, you will want your precomp to add in "nose right" on Mid-stick to Full-collective. it's just a blip. it doesnt move much. i usually hold a finger on the tail blade to feel it. you just have to be extra careful to NOT hit the rudder when you're giving full collective.

alternatively, you could just set it to reverse and see if it makes the kick better or worse. either way ;-)

if it ain't broke, break it.

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06-30-2013 03:39 AM  5 years agoPost 54
hpilotrc

rrVeteran

NY--->>Mooresville, NC USA 8/2005

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AR7200's rev mix or pre-comp...
It's going in the right direction...but it just isn't enough!

I guess I will used the custom setting when I get the USB interface and then can ramp it up somewhat. It only causes the nose to turn when I give it a fast full collective and keep it there.

Michael

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06-30-2013 03:50 AM  5 years agoPost 55
TomC

rrKey Veteran

Gold Coast, Queensland, Australia

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Maybe try increasing your tail gains and/or reduce your collective pitch range.

TomC

Nqx,Mcpx-BL,300x,450x,500x,550x
Ion-x, 10s ,SS
TT X50E 10s, HC3-Sx

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