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Midland Helicopters . HeliProz . ZoomsHobbies

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e-BEAM Beam E4 > Electric Newbie Questions...
 
 
Picaboo
New Heliman
Location: Seattle, WA

I'm about ready to do a test flight with my Beam, but have a couple question in regards to electrics that I am unfamiliar with. I'm using a Scorpion -8 motor and Scorpion 35amp esc, TP 2200 Lipo and JR X9303 TX.

When I plug in the battery to the esc and turn on the TX, I hear a series of short beeps, and then I fire it up and everything works as it should. When I'm ready to shutdown the helicopter and put the throttle to the low position, everything stops spinning as it should. However, if I turn off the TX before uplugging the battery to the esc the motor starts spinning out of control. I have to quickly turn the TX back on and wait for a connection with the RX to be made before I can regain control.

Is this normal? I have a habit of turning off my TX after I'm done testing/flying, and luckily I didn't have blades on this time but I may have a disaster next time I forget.

Thanks.
04-09-2008 06:07 AM
 
 
george0079
Elite Veteran
Location: Terra Firma

Quote 
I have a habit of turning off my TX after I'm done testing/flying, and luckily I didn't have blades on this time but I may have a disaster next time I forget.

Then, Don't forget.

Your TX needs to be the first thing you turn on, and the last thing you turn off.

The older I get, the shorter my attention....... Oh look. A shiny penny..

Steve
04-09-2008 06:16 AM
 
 
Picaboo
New Heliman
Location: Seattle, WA

Ok, thanks for the feedback. I'll follow your advice and make sure the TX is the first thing on and last thing off.

So this is normal however, for the motor to start spinning as soon as the TX is turned off? I guess I just find it odd that it won't start spinning when I initially plug in the battery with the TX off (which I won't do anymore) but it does after having been run and switching the TX off.
04-09-2008 06:24 AM
 
 
george0079
Elite Veteran
Location: Terra Firma

Depends on what TX system your using. Some have a failsafe system that can be setup to automatically go to low throttle setting when the receiver looses a signal.

Note: Filling in your profile really helps people help you....

The older I get, the shorter my attention....... Oh look. A shiny penny..

Steve
04-09-2008 06:27 AM
 
 
Picaboo
New Heliman
Location: Seattle, WA

Filled out the profile And I will check out the manual on my TX to see about that failsafe...after I get some sleep. Thanks again.
04-09-2008 06:37 AM
 
 
frebou
Key Veteran
Location: Montreal / Canada

If you are using your 2.4/9303 with the beam, you should not have any "surprise" of motor jumping into power when you shutdown the TX.

The default failsafe position with JR 2.4 is to bring the signal to "0%". Every other servo keep their position.

The only way (I know of) to change this behavior is to specialy bind the TX and RX in another state by using the alternative method of binding.

You could always rebind your TX with your RX while being sure the throttle is in the "low" or even Throttle hold position.

Give us some feedback is you find something.

BEAM - Beautifully Engineered Action Machine
04-09-2008 12:19 PM
HOMEPAGE  
 
 
rcman
Veteran
Location: Logan, Utah

Yes this is some what normal. Really you should always do as George recommended

Quote 
Don't forget.

Your TX needs to be the first thing you turn on, and the last thing you turn off.

It is in the best interest to alway practice this (turn on TX first and Turn off TX last) that way you will not have a problem. Yes I know the you can set fail safe but as we all know their are times that It will not work. I for one know that it does not always work that way.

Picaboo, we all want you have have a good experince with your new Beam, if you do what has been recomended you will have a great time

Let us know if you have any other question

Take care Dave
04-09-2008 04:34 PM
 
 
Picaboo
New Heliman
Location: Seattle, WA

Appreciate the replies. Well I havn't been able to access the failsafe menu to determine what it is set at...but assuming it is at the default 0%, it seems something is backwards. The reason I say this is becuase my Throttle Hold has the default -5% value, yet, when I throw the switch the motor and blades fire up. Found out the hard way and am suffering a scratched lcd screen Rough start and a couple newbie mistakes so far, but why do these inputs seem to be backwards???

Hmmm...come to think of it...I have the ESC programmed to run the motor in reverse, probably because I had the motor wired wrong the first time. Instead of switching the wires around I reversed the motor instead. Could this be my problem?
04-11-2008 06:49 AM
 
 
Picaboo
New Heliman
Location: Seattle, WA

And another question. Using the Hitec HG-5000 gyro and Hitec digital servo combo, I notice the tail rotor does not center consistently. For example..if I move the rudder stick to the left or right, it moves to the left or right...but when I let go and let the stick return to center, the servo does not always center. Actually, it will stay at full left or full right. You almost have to wiggle the stick back and forth and then it seems to center itself. The pitch slider moves freely, so I know it is not sticking. Even when I disconnect the rudder servo from any connections, it will do this.
04-11-2008 06:58 AM
 
 
rcman
Veteran
Location: Logan, Utah

Picaboo,
You are correct throttle hold default is -5% you can make it larger like -10 and I am sure the motor will not spin with throttle hold.

The motor doesn't care if it is running in reverse you can do it two ways. One would be if the software on the ESC had "reverse motor" and the second would be by unpluging the two outside wires from the motor to the ESC and switching their place. So you would unplug the left motor wire and plug it into were the right motor wire was plugged into, then plug the right motor wire were it was on the ESC, that would revers the motor as well

What you are talking about on your gyro is what happens when your gyro is setup in heading hold the servo will drift to one side or the other when sitting on the bench. If you flip the switch to rate mode it would center and stay somewhat centered. However my tail pitch slidder is not center in rate mode because you will be counter acting the torque of the head so it will be a few deg's off on the bench

I hope that helps, Let us know

David
04-11-2008 06:50 PM
 
 
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e-BEAM Beam E4 > Electric Newbie Questions...
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