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BeastX FBL System BeastX FBL Flybarless System Software and Hardware Support |
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10-05-2012, 05:50 PM | #1 (permalink) |
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AR7200BX Sudden Roll On Idle Up 2
On both my Furion 6 and my Logo 400, as soon as I switch it up to idle up 2 the heli suddenly rolls to the right aileron (if looking at the heli from the rear). I nearly crashed my Furion 6 when I switched it to idle up 2, my Logo wasn't so lucky. I have gone thru two sets of blades on my Logo. I don't know what's going on, has anyone else had this issue?
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I've gone to the dark side....planks. For now.... JR XP9503 at the controls! |
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10-05-2012, 09:24 PM | #2 (permalink) |
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I would say vibes more than likely
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Heli's I have: Goblin 500 (Vbar Neo), Gaui X5(Vbar Neo), X7(Vbar Neo), Innova 600 Night heli (Vbar Neo Vbar Vcontrol I'm the not so newbheliusr as I have been here a while. But I like this name. |
10-05-2012, 09:30 PM | #3 (permalink) |
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If it is happening in the same way on 2 separate machines, more likely a TX mix problem- where you have trim setup in Idle2 etc.
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10-05-2012, 11:18 PM | #4 (permalink) |
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But I never altered anything in my tx. I had a Fusion 50 and a Rex 500 and both 7200's that were on them went on to my new birds. Both of them flew great so when I got my new birds, the only changes made were on the setup on the AR7200. I will check my radio but I did check my trims and they are zeroed out at all idle settings. But what's weird is both birds rolled to the right on the change to idle up 2.
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10-05-2012, 11:44 PM | #5 (permalink) |
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Tony
If you d/c your motor, and simulate this on the bench with your machine powered/booted as per normal procedure for a flight, with collective at hover position when you flip to Idle2 etc, does the swash move? Maybe you have trim set in Norm during init, and then switching to Idle2 removes the bias, etc. The uB seems to reset its neutral stick position on init, at least per my experience, so perhaps you are fighting this as a trim issue in Norm mode. If the swash does not move on this simulation, then maybe it is something with gain or vibration. Hard to imagine both machines having that vibration mode, at the same time, etc. Typically, seems for standard installs, the reaction is normally pitch-up for instances I have seen or read about. Perhaps it can also happen with roll, but if it is the pitch gyro in question, mounted vertically, that becomes yaw (tail), and not aileron… Anyway- check on the bench first maybe, see what you can see J
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10-06-2012, 05:56 AM | #6 (permalink) | |
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Quote:
What tx? As mentioned before, did you check to see if you have any trim set for the IU flight mode? Some tx's have seperate trims for each flight mode. I just disabeled mineon my DX8. Are you using the supplied foam tape or the 3M 4011 mounting tape?
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Trex 500-3226-1600, 14T, Koby 90LV, HS-5245MG, DS655, AR7200BX, DFC Trex 450 Sport-2221-8, 15T, CC Edge 50 Lite, HS-5065MG, HSG-5084MG, AR7200BX, DFC DX8 |
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10-06-2012, 08:42 AM | #7 (permalink) | |
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Quote:
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10-06-2012, 08:44 AM | #8 (permalink) |
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DX7. I went thru all idle settings prior to my flight yesterday and all trim settings were all centered. Yes, I'm using the supplied foam tape.
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10-06-2012, 03:11 PM | #9 (permalink) |
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Don't use the supplied tape. Mine was doing the same thing. Replaced tape with 3m and all is well. Your controller is moving some using the stock tape.
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10-06-2012, 05:14 PM | #10 (permalink) |
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I bought the BeastX foam tape from helidirect. Both birds have that tape on them. What 3M tape did you buy?
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I've gone to the dark side....planks. For now.... JR XP9503 at the controls! |
10-06-2012, 07:04 PM | #11 (permalink) |
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It's the 3M 4010 or 4011. One is gray and one is clear. It's like outdoor mounting tape. A good number of people have used it to solve problems with the bx and AR7200BX.
You can find some HD outdoor mounting tape at Home Depot or your local hardware store.
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Trex 500-3226-1600, 14T, Koby 90LV, HS-5245MG, DS655, AR7200BX, DFC Trex 450 Sport-2221-8, 15T, CC Edge 50 Lite, HS-5065MG, HSG-5084MG, AR7200BX, DFC DX8 Last edited by wanderer56; 10-07-2012 at 05:24 AM.. |
10-06-2012, 08:23 PM | #12 (permalink) |
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Grey 3m outdoor at Home Depot. Hope this solves your problems. Let us know how it works out.
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. Futaba 16SZH, Trex 700X, MicroBeast Plus, , POWER LAB 6 |
10-06-2012, 10:40 PM | #13 (permalink) |
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I just did a bench test with the motor pulled away from the main gear. I added power to the motor and went thru idle up 1 and 2. The swash servos didn't move at all when I cycled thru the two settings. I will switch out the tape next.
But why would the different tape make the difference? And why does it only do it on idle up 2 and not 1? Sounds like a few people have had this issue. So for those that switched out the tape, that cured this issue?
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10-07-2012, 05:36 AM | #14 (permalink) | |
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Quote:
Assuming your running different HS's in IU1 and IU2, different speeds will produce different resonate frequencies to the air frame and fbl unit. The fbl unit can withstand some vibration, but it's the ones with the highest amplitudes that will start affecting the fbl. IMO, it varies with each heli and mounting location, inherent vibration in the heli (all helis vibrate to some extent), blade balance and pitch, (some guys think balancing blades is overrated and omit this step), tracking varience also produces vibrations if off signifigantly, any other anomoly in shafts, linkage or bearings. BTW-How old are your motor bearings? There have been quite a few posts about bad motor bearings upsetting the fbl unit also.
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Trex 500-3226-1600, 14T, Koby 90LV, HS-5245MG, DS655, AR7200BX, DFC Trex 450 Sport-2221-8, 15T, CC Edge 50 Lite, HS-5065MG, HSG-5084MG, AR7200BX, DFC DX8 |
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10-07-2012, 09:22 AM | #15 (permalink) |
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I am anal about making sure my blades are balanced. In fact on my last flight on the Logo, I weighed each blade and was checking tracking before I went to idle up 2. Tracking was right on at the time. I'm not sure how old the bearings are since both helis were just recently purchased here on HF. When I powered up the motor on my Logo last night, there wasn't any vibrations at all from the motor. I'm gonna buy some tape today, my blades should be here by Wednesday.
Do you use a metal plate in between the tape and the FBL unit? I ran the metal plate on my other birds with no issues. I, currently am NOT running the metal plate on both the birds I'm having the issue with.
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I've gone to the dark side....planks. For now.... JR XP9503 at the controls! |
10-08-2012, 01:18 PM | #16 (permalink) |
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AS mentioned the 3M grey is good for FBL, I used this on my beastX unit too, better on vibes. The metal plate solution is better for Nitro machines due to the additional vibrations from the motor, gel pads are sometimes used to for additional damping instead of foam tape. THe metal plate adds additional vibration isolation due to mass being added. I have tried the gel and metal plates and found I got better results with the 3M grey myself.
Have you tried to balance your head and tail on a prop balancer? This will give you an idea of what I mean, I do this for my FB and FBL heads as well as balancing the tail assemblies. THis is done with and without the blades installed to insure my head is not off too, I had a grip be out a gram or so b4 that caused issues. My machines are quiet and smooth fliers as a result, people have commented on this fact.
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10-09-2012, 07:42 AM | #17 (permalink) |
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I have not done what you have listed above. Definitely not a bad idea to do that either. I'm out of town right now and my blades should be in by mid week. I should have a flight report by the end of this week with the new 3M tape installed. I will give all of you a flight report when I can.
Thanks again for everyone's thoughts in to this frustrating matter.
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I've gone to the dark side....planks. For now.... JR XP9503 at the controls! |
10-09-2012, 07:36 PM | #18 (permalink) |
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Please do use either 4011 or 4010 3M tape. It really is better.
Scott
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10-10-2012, 07:28 AM | #19 (permalink) |
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I'm picking some up today. I hope that cures my issue. Haven't been able to really fly for about three weeks now.
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I've gone to the dark side....planks. For now.... JR XP9503 at the controls! |
10-10-2012, 09:56 AM | #20 (permalink) |
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Just helped a fellow HeliFreaker at the HFFF with this same issue. Also happened when I would overspeed the head. Bad aileron tilting. This was on a super smooth Goblin setup.
Turns out the board inside his 7200bx was loose! Wiggling it there was considerable play. After hot gluing connectors to help secure it problem solved. But I suggested when he got home to secure it in the case. |
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