Power issue
Ok, so hear is the deal. Brand new 2 meter plane. New Hymax 6330-210, with an ICE 80 HV that has about 20 flights on another plane that worked flawlessly. I am using Power Unlimited’s Dean’s series connector.
http://www.f3aunlimited.com/webstore/index.php?main_page=product_info&cPath=33_57&produ cts_id=312
Maiden today. First flight goes off without a hitch. Second flight…..plug in the batteries and get 10 beeps and the arming code. Taxi out and give it power . It felt a little weak, but being new to 2 meter electric, I lifted off and knew off the bat I didn’t have any power. Just got it turned around to the field going down wind. Pan caked it in and took out the landing gear plate.
I downloaded the Castle file and the voltage for the bad flight was only 20 volts. I checked both batteries after and they were fine on voltage. Both batteries have about 30 flights on them.
I hooked up the same batteries on the bench and they now show 40 volts on the Castle file and it runs fine. This whole thing doesn’t make any sense. How could the controller arm in the first place if only one battery connection was open to be only 20 volts? If the series connection is broken, “no” voltage would reach the controller, not half the amount.
Anyone have any ideas?
Thanks
Woodie
Team Acme LG
Team Blenderm
That's exactly what I am saying. It doesn't make any sense. If it was an open circuit it wouldn’t have armed, and I wouldn’t have heard ten beeps.
Here is the file. You can see the drop to 20 volts. The one before was the maiden flight and the three after were on the bench that show 40 volts.
I have used the same packs as 5’s in an Osiris with no issues.
In my case I must have had 200 flights on the connector but the symptoms were very similar to your own.
The way I rationalised it is that the packs were able to deliver full voltage under no current but the voltage drop under takeoff current was enough to trigger the motor shutdown on the ESC.
I notice that you said this was an ICEHV80. If it's not an ICE2 you are due a free upgrade from Castle anyway.
John
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Didn’t try re-arming with no thought process five feet off the ground.
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Fail Safe is “throttle to low”.
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Deans connectors are all brand new so shouldn’t be a pitting issue.
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I intend to resolder all connectors.
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I’ll send the log to Castle today.
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One other thing that may or may not be relevant. I always switch on my receiver first and then plug in the flight packs. After I got to thinking about it, I may have done the opposite. Could this be an issue?
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Thanks for all your help.
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Bad solder joints, pitted connectors or wonky cells wouldn't give a line as straight as that, although there is a small bit of ripple in the middle where a bit of curren tis being drawn.
My guess is the ESC at some point decided the voltage was 20V for whatever reason, logged it and acted accordingly.
NOTE: It is HIGHLY recommended that all users discontinue use of firmware V4.00 due to a known bug that can cause unusual ESC behavior. Users may either upgrade to V4.01 or downgrade to a previous version.
Functional Improvement: Increased maximum throttle change rate on Multi-Rotor setting. A throttle change of 50% can now be accomplished in .08s.
Bug fix: Occasional errors were being recorded in the data log. Fixed
Bug fix: Unusual motor shutdowns, and other controller anomolies including ESC failure. Fixed
Just a thought.
rm, gaRCfield
Yes it was in "auto", I willchange that.