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0 01-May-2017, 02:06 PM (This post was last modified: 01-May-2017, 02:06 PM by NoxNow.) When I punch my throttle for 1 second and then cut it and try to roll my quad becomes unresponsive for a spilt second. Specifically, immediately after I cut the throttle I am not able to roll, but if I try rolling again it works. Same issue for anything I try after punching the throttle.
Happens on fully charged lipo. No RSSI warnings on my Taranis. Using X4R-SB rx.
Any suggestions are much appreciated!
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34 First thing that comes to my mind, have you enabled airmode?
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0 Yep airmode is always on. The quad seemed to work fine in previously. The issue I am seeing is new.
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45 Possibly voltage spike if it's happening only with throttle off. Do you have a capacitor installed on your PDB?
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72 What flight controller? What firmware and version? What motors, ESCs and props? Can you record a black box log?
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0 No capacitor. Maybe I will add one. Has there been reported issues with controller inputs not getting registered during voltage spikes?
FC is betafight F3. Betafight 3.1. Aikon esc and brotherhobby T2s.
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72 I've not heard of any behaviour like that.
A black box log will tell you what is happening.
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139 could also be FC shutdown.. so check soldering, and any loose cable...
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0 Looking at the bb logs, during regular flight (just flying straight), I momentarily lose control (less than a second).
From what I can tell from the logs: rxSignalReceived goes false then ~300ms later, rxFlightChannelsValid goes false. At that point throttle goes to zero. All motors goes to 0%. I suspect betaflight cuts throttle as a failsafe. ~600ms later rxSignalReceived, rxFlightChannelValid return to true and throttle, motor % return to same values before outage. Using X4R-SB, transmitter does not sound any loss of signal.
I've tried to jiggle the wires and connections while the quad is powered on to try and re-create the issue, but no luck.
At this moment I suspect it may be an issue with the RX or my Taranis. I will also re-check the solder joint between the X4R and betaflight F3 FC to confirm the joint is good. Any other ideas on what's happening will be greatly appreciated.
Thanks.
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0 Found the RX negative wire soldered to the FC was a bad solder joint. I've resoldered. Raining today so I will test on the weekend. Thanks everyone for your suggestions.
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