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11-21-2015, 11:33 AM | #1 (permalink) |
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Join Date: Jul 2013
Location: Middle East
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Governor !!
Hi, stuck and need help please. Tried most everything I can think of and out of ideas.
G700 with TRM 300. 7:1 gear ratio. (Spektrum telemetry) Tried both the Spirit Pro and IKON units without any change in result. Using Align sensor - both a new one and one of a nitro that works. Sensor gooped to the fan case to read of the fan magnet, I could not get the governor to engage. RPM readings at idle jumps between low 500 to over 2,000, back to 500 constantly. At higher RPMs, the trend continues with readings jumping between 1,700 and 4,000. Sensor reading of a single magnet on the main gear. Seems better at mid RPMs ( 1,700 - 1,800). However IU2 would not engage if set at 1,900 or more. Then looked at the actual data and not the graph and found these frequently spaced two frame drops to 0. I suspect this is causing the governor to react ? How do I get to a working governor ? I'm ready to ditch the current setup for a know combination that works !! |
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11-21-2015, 11:54 AM | #2 (permalink) |
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Did you flip the red and black wire on the align sensor?
There is a reason I run the Futaba GY701, they are simple and work fantastic over a very wide range of head speeds.
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Tom TRM Power CAUTION - my posts are based on my experiences, yours may be different. |
11-21-2015, 07:40 PM | #3 (permalink) |
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Hi, thanks for the reply.
Can I use just the Futaba sensor, or must the whole GY701 gyro be used ? There seem to be some activity in this regard on the Spirit forum and I will follow that closely too. |
11-21-2015, 09:49 PM | #4 (permalink) |
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The GY701 is the controller for a gov and/or a tail gyro.
As a gov, it uses the Futaba sensor. Here is the controller and sensor: https://rcjapan.net/futaba-gyro-c-69...tjmqvlat0kkm84
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Tom TRM Power CAUTION - my posts are based on my experiences, yours may be different. |
11-22-2015, 09:38 AM | #5 (permalink) |
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Hi, one more / last go at it. The suggestion was made to use the generator coupler and this is what I've done so far. I wanted to recreate a nitro setup as closely as possible :
1. I do not know if the orientation of the sensor is important, so I mounted it flat in the direction of spin. did not want to introduce any variables. If it can be mounted vertical, it should be easier and cleaner. 2. There are two threaded holes on one side of the bearing block, so I used these to build a little "perch". 3. I used the new Helix coupler as it is bigger and made the drilling and mounting for the magnet easier (sorry Raja !!) I managed to do a quick start and spin up, without the main gear (I know, in the house ... smells lovely - Klotz oil - until she gets home from work ...) Data looks clean and more consistent. No "frame losses" like before. Will have a trail flight in the morning and update. |
11-22-2015, 09:47 AM | #6 (permalink) |
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looks good
What you did looks ok, if it works then you're done! If not then you can try moving it around or possibly even using the stock sensor gooped to the side of the RC motor case to pickup the rpms as I'm doing with my Raptor.
-=>Raja.
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11-24-2015, 01:21 PM | #7 (permalink) |
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It's raining !!!!!!! Derailed my plans for testing. (serves me right for making weather comments elsewhere ! )
I was hoping to have some results before "black friday" sales, should I have to resort to buying a GY701. With that in mind, is the stock Futaba sensor fine, or is the Stator Gator required / better ? Ps. I fair reflection of how confident I am in this last attempt..... |
11-24-2015, 02:03 PM | #8 (permalink) |
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I have had more consistent results using a sensor other than stator gator.
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Tom TRM Power CAUTION - my posts are based on my experiences, yours may be different. |
11-24-2015, 06:16 PM | #9 (permalink) | |
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Quote:
I am using a GY701 now until BD brings out their FBL with gov. |
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11-26-2015, 11:30 PM | #10 (permalink) |
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As I said on pm too close is an issue
Sensor picking up the fan magnet is an issue Always use neodymium magnets with those Match the red black and white wires configuration to what ikon / brain requires Check out this pic just to be sure
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Goblin Gasser TRM VX310TT Align MJ Design DTS 700N 91 HZ-R 3D Blackout Extreme Gasser #4 MCPX BL 2 iX12 Gaba |
12-05-2015, 02:33 PM | #11 (permalink) | |
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Quote:
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"I love the smell of Nitro/Gas in the morning!" Citizen 654 |
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12-05-2015, 07:46 PM | #12 (permalink) |
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Thanks for the reply !
i only had "moderate" success with this setup. It would perform okay below 1,900 RPM (headspeed). Over this it was not stable and wouldn't hold. It hunts and overspeeds. I tried different sensors, making sure the surfaces are clean with no sign of nicks or damage. I tried spacings from almost 2 mm away till as close as possible. GY701 enroute and should be here late this week. |
12-05-2015, 07:50 PM | #13 (permalink) |
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Is this with the ikon?
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XL Power 700v2 Nitro NME - OS 105HZR - Power Tune - Rail 716/106 - Brain2 HD |
12-05-2015, 07:58 PM | #14 (permalink) |
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Yes.
The "new" governor is working nicely on my nitros, but here I couldn't get it figured out. |
12-05-2015, 08:03 PM | #15 (permalink) |
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Very interesting. I have the same setup, and have the same problem.
One magnet on the main gear with an align sensor. Mines even worse though because as it over speeds it shakes like crazy. On throttle curves the heli seems to fly fine, little bit of a wobble when I unload the head and the revs pick up. So I might have a vibe or dampening issue. Really frustrating, the old firmware was worse, but I haven't really noticed a huge improvement with the new firmware.
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12-05-2015, 08:25 PM | #16 (permalink) |
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Yep, exactly the same for me .... head wobble and all !!
I had the Spirit Pro on it to start and this was very good all round, but the governor was completely unusable. Switched to the Ikon and although the governor is usable at moderate speeds, it needs more setup and tuning. I suspect it will settle down as Spirit with GY701. Ps. Haven't tried SL on the Ikon. |
12-05-2015, 08:45 PM | #17 (permalink) |
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I really like the ikon, I would like to solve the problem. That's very good to know the problem is repeatable in another heli.
Edit: I reread the thread. Now I'm really stumped. It did this with the signal pickup off the crank (mag off coupler) as well? Despite the better signal?
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12-06-2015, 01:37 AM | #18 (permalink) |
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Hi, the current behaviour is with the setup as in the picture. I was hoping, if I replicate a "nitro setup", it would perform, but I must've missed something along the way, or the skill to tune it properly. (tried every combination of PID and precomp settings imaginable)
I intend to mount the GY701 pickup in the same place, so I will have a reasonable comparison. It will also be interesting to see the signal strength. This is one thing that I really would like in the Ikon & Spirit somehow- to see the sensor signal quality. Without it, I feel like i'm shooting in the dark most of the time. However, I believe this is more a function of the sensor itself, rather than the FBL unit. Perhaps they can find a way to cope with the Futaba signal. I will update with full details when the new unit gets here. Ps. I have not taken this up in the Ikon forum. I might just do that and see if there is any advise. |
12-08-2015, 11:21 PM | #19 (permalink) | |
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Quote:
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XL Power 700v2 Nitro NME - OS 105HZR - Power Tune - Rail 716/106 - Brain2 HD |
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12-09-2015, 06:38 PM | #20 (permalink) |
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Hi, GY701 is here and will go on tonight.
To be honest, I'm not going to spend more time trying to make it work with the Ikon (and definitely not the Spirit). I've spent too much time not enjoying this as it should be. As a side-note, someone posted a really nice way of testing SL. I will try this, before testing it in the air : Post # 11 https://www.helifreak.com/showthread.php?t=723893 |
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