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HomeRC & PowerAircraftHelicopterFlybarless Rotor Head SystemsBeastX › Micro Beast plus resets itself (turns off and on)
08-07-2018 07:13 PM  71 days agoPost 1
hrc37

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Derry, PA

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I have a Micro Beast Plus that I'm using 4 HV Servos along with a Castle 10amp BEC. If I set the voltage on the BEC to anything over 6 volts, the BeastX will reset (as if you were removing power and then applying it again) if you just tap on the unit or from just the vibration from the helicopter (no blades attached). If I set the BEC voltage to around 5.8 to 6.0v, the unit is more stable but will still do it once in a while. I then tried a 2-cell lipo connected directly to the the unit and it seems fine. I also tried all this with another NIB Beast Plus with the latest firmware and it acts the same way. I swapped servos (same make/model but new ones), new receiver, new BEC, and all new cables with the same exact results. This is the first BeastX I've ever used 4 HV Servos with. So at this point, I'm thinking that my Castle 10amp BEC can't handle the current of the HV Servos and I'm seeing a "brown out". But when testing with a WATTS-Up meter, it only shows around 2.5amp peak draw which is way under the 8amp continuous draw that the Castle BEC is rated at. The other strange part to all this is why it only does it if you tap on the until or when it senses vibration from the machine. I've order a Castle 20amp BEC and will see how that works or I just may go with a 2-cell lipo and eliminate a BEC all together. But I would like to know for sure what is causing this issue so I have confidence that I won't have it when flying the machine. Which this did happen the first time I flew the machine but I was only hovering it a few feet off the ground at the time when it lost power. Which the Castle speed controller does give a "radio glitch" error when this does happens. Any thoughts or ideas or if anybody else has experienced this....????? Thanks! Mark

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08-07-2018 07:28 PM  71 days agoPost 2
tgalo

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USA

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Wow thats strange. I have never had anything like that before. I've got plenty of beastx units running on a straight 2s pack and a few with a regulator.I even have one with 4 cyclic HV servos and a HV tail with no brownouts. Did you try a straight 2s pack?

Gravity's a bitch ant it?

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08-07-2018 07:48 PM  71 days agoPost 3
hrc37

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Derry, PA

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2-cell lipo
Yes and I stated that in my post. It seemed ok with that setup but I didn't test it that long. When using the BEC set to anything over 6 volts it does it almost immediately and under 6 volts it takes a couple of minutes to do it. With the 2-cell lipo, it seems fine for the 3 or 4 minutes I tested it but can't be sure if it wouldn't happen 5 or 6 minutes into a flight. That's why I would like to know what is causing it so I can have more confidence in the "fix".

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08-09-2018 04:04 PM  69 days agoPost 4
Pistol Pete

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Seffner, FL

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hrc37
when testing with a WATTS-Up meter, it only shows around 2.5amp peak
Under load? Try picking up heli by swash plate and pitch pump for a "better" load test. My doubts are on the 10A ESC.

~~Enjoying the hobby one flight at a time~~

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08-09-2018 05:05 PM  69 days agoPost 5
hrc37

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Derry, PA

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Yes I would agree if that was the case and it may be but as I stated, I'm having this issue "on the bench" and also experienced it during the first flight just hovering. I've also used 10amp BEC's (and ESC's with even less amperage BEC's) in the past with non-HV Servos without any issues.

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08-09-2018 05:58 PM  69 days agoPost 6
ticedoff8

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Morgan Hill, CA. USA

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It may be a loose wire from the BEC to the FBL.
That may explain why you didn't see the problem when using the 2S LiPo and you see the problem on the bench with the BEC.

But, you don't tell us the size of the heli / servos.
If it is a 550+ sized heli, then a 10A BEC is not going to cut it.
And, you are not going to see the voltage glitch that is resetting the FBL without an oscilloscope.

I never flew a 550+ sized heli on anything less than a 20A BEC or a 2S 2200mAh LiPo.
Also, with a 550+ sized heli, you need to use either heavy gauge wire or multiple connections from a heavy-duty BEC to the FBL.
If not, simply exercising the servos on the bench can cause a brown-out.

I typically add a 4700mF capacitor attached to an unused port on the FBL too. That helps damp-out the voltage spikes that can happen.
Spektrum has them.

EG:
As part of its normal power on self test, the Brain / iKON gyros will simultaneously run all 4 servos to their maximum +/- throws 3 times (pitch-pump) while it is monitoring the voltage.
If the voltage drops by more then 25%, the gyro starts flashing LED and logs the error in it's event logs so you know there is a problem.

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

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08-09-2018 06:14 PM  69 days agoPost 7
hrc37

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Derry, PA

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It's a Goblin Urukay and I'm using 3 KST 815 and 1 KST 525 servos. As for the "loose wire", as I said in my original post, I replaced all the cables with new ones. I also tried feeding power to both the receiver and BeastX. I also tried the heaviest gauge wire I could but the bottom line is you are limited on just how heavy you can use because of the size of the connectors.

But you may be right about not being able to see something without an oscilloscope. But what really got me stumped is why the slight voltage difference in the BEC settings and why tapping on the BeastX (or slight vibration) causes the issue.

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08-09-2018 06:23 PM  69 days agoPost 8
hrc37

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Derry, PA

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ticedoff8
I typically add a 4700mF capacitor attached to an unused port on the FBL too. That helps damp-out the voltage spikes that can happen.
Spektrum has them.
Interesting, I just did a search for this capacitor on Horizon's web page and it states "This Voltage Protector is not intended for Aircraft use."

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08-10-2018 12:22 AM  69 days agoPost 9
ticedoff8

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Morgan Hill, CA. USA

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I supposed this...
I swapped servos (same make/model but new ones), new receiver, new BEC, and all new cables with the same exact results.
is what you are referring to when you say...
As for the "loose wire", as I said in my original post, I replaced all the cables with new ones.
but, then you say...
I also tried feeding power to both the receiver and BeastX.
That may may be part of the problem.

In my mind, there are 2 things:
- I suggest you connect all the BEC power leads (or 2S LiPo leads) to the BeastX. The receiver will get its power from its channel connections to the BeastX.
The servos are connected to the BeastX and they are the ones that are drawing all the current.

- Doesn't the BeastX support attaching Spektrum DSMX sats directly to the sat-ports on the BeastX?
I didn't know you needed a "traditional", separate receiver.
If it does support DSMX sats, I would use those instead.

4700uF cap:
A lot of people use them on aircraft.
Some suggest 10,000uF caps.

https://www.amainhobbies.com/spektr...r-spm1600/p6570

https://rc.runryder.com/t397787p1/

https://www.graupner.de/Speicherkon...faenger/7082.1/

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

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08-10-2018 11:37 AM  68 days agoPost 10
steph

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Hampshire England

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hrc37
BeastX will reset (as if you were removing power and then applying it again) if you just tap on the unit or from just the vibration from the helicopter
I think there in this statement is your problem the beast x has a internal wire or dry joint I would send the beast x back to be tested

The world is round you can run but you will always end up where you started from

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08-10-2018 01:02 PM  68 days agoPost 11
ICUR1-2

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Ottawa, Ontario

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On most adjustable BEC if you raise the voltage out, the amps out drop.

Being a 10 amp at 8v it may only be capable of 3 amps out.

Get a strong BEC or go 2s direct

spending time, paying attention

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08-10-2018 01:04 PM  68 days agoPost 12
Pistol Pete

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Seffner, FL

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steph
I think there in this statement is your problem the beast x has a internal wire or dry joint I would send the beast x back to be tested
Perhaps but...
hrc37
I also tried all this with another NIB Beast Plus with the latest firmware and it acts the same way
What are the odds that both have the same issue?

~~Enjoying the hobby one flight at a time~~

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08-10-2018 01:14 PM  68 days agoPost 13
hrc37

rrApprentice

Derry, PA

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ticedoff8
Doesn't the BeastX support attaching Spektrum DSMX sats directly to the sat-ports on the BeastX?
I didn't know you needed a "traditional", separate receiver.
If it does support DSMX sats, I would use those instead.
Yes it does but I forgot to mention that I'm using a Jeti transmitter and receiver.

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08-10-2018 01:43 PM  68 days agoPost 14
hrc37

rrApprentice

Derry, PA

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ICUR1-2
On most adjustable BEC if you raise the voltage out, the amps out drop.

Being a 10 amp at 8v it may only be capable of 3 amps out.

Get a strong BEC or go 2s direct
Yes, that's what I was thinking (OHM's Law). If I increase the Voltage out of the BEC, the amp draw increases. And I'm thinking that the tapping on the FLB unit (or the machine vibration) is causing all the sensors in the Beastx to react at once which will also increase the current draw and that's why I'm experiencing a "brown-out". But according to my Watts-up meter, the peak current draw I see is only around 2.5amps on the bench. But as ticedoff8 already stated, I may need an oscilloscope to see what is truly happening. I do have a Fluke meter and I will test using that over the weekend. But as I stated in my original post, I did order a Castle 20amp BEC and will see what the results are using it. I hope it shows up today or tomorrow.

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08-10-2018 01:59 PM  68 days agoPost 15
fastflyer20

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N. Tonawanda, NY

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A Castle 10A BEC is not up to the job, it is too small. Per CC web site "Perfect for 450 size or smaller helis. If you need more amperage or voltage capability, our CC BEC Pro is the way to go!"

Years ago, I switched to Wester Robotic BEC's, you want a 20A BEC. WR is top of the line and when your talking powering a heli, I don't like to skimp.

Tom
CAUTION - my posts are based on my experiences, yours may be different.

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08-10-2018 02:12 PM  68 days agoPost 16
hrc37

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Derry, PA

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Wester Robotic
Wester Robotic does have some impressive BEC's. But I'm thinking that if the Castle 20amp doesn't solve my issue, then I may just go with a 2-cell lipo wired directly to the BeastX and the receiver since I am using HV-servos. I'm going to do some more testing with 2-cell pack just to be sure I don't see another brown-out.

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08-10-2018 04:56 PM  68 days agoPost 17
ticedoff8

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Morgan Hill, CA. USA

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Yes it does but I forgot to mention that I'm using a Jeti transmitter and receiver.
If it is one of the newer Jeti, it is a "single wire" serial receiver (similar to SRXL).
So, to confirm: You do not need to connect the BEC / battery to the Jeti receiver.
It gets its power from the BeastX through the serial cable's +/- leads.
When you get the CC BEC Pro 20, then connect both of its power leads to the BeastX

Also, check out Perfect Regulators web site.
There are regulators, battery backup systems, "smart switches".
That guy is awesome.
When he thinks of something, he designs it, manufactures it and the puts it on his web site.
American made, American designed and the guy answers his own phone.
And, he flies RC helicopters.

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

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