This has been a great thread for learning how to properly setup the SD6. Thanks to everyone who has contributed. I figured it was time I jumped into the mix with a problem/solution.
Tonight I figured out how to trim the roll axis of the Tarot 2D gimbal. My GoPro was sitting about 2 – 3˚ off level horizon, and while this wasn't a huge deal, I could certainly see it in my footage. The Tarot software would only let me trim out the tilt (connected to AUX2 on my Rx) and not the roll. I saw on another site a solution for hooking up the Tarot gimbal to the Phantom Naza (instead of the Rx) with just 3 wires, so off I went to the hobby shop and bought myself some servo wire and connectors. After about 20 minutes of casual labor, I had a perfectly level GoPro.
The idea is that you loop the gimbal control through the Naza F1 & F2 ports and then use the servo travel limits to set the correct center for the pitch axis and roll axis. After doing this, it actually seemed more convenient to me than using the special Helipal cable extension that hooks directly into the Rx.
So, basically you remove the Red (middle) wire from a male to male servo lead and put some shrink tube on the exposed parts of the red wire so it becomes a single connector you can place where necessary. On the gimbal, put the White wire on roll (R), the Black wire on negative (–), and the single Red wire on tilt (T). Then on the Naza, put the plug with the black wire on top into the F1 port and the single Red wire onto the bottom pin of the F2 port. After you're done with this, simply place a short jumper (Brown, Red & Orange wire) from the X1 port (on the other side of the Naza) to AUX2 on the Rx. DONE.
After this, just set the MAX, MIN and Center points for the gimbal as necessary (trial and error, it's not hard) through the NAZA software on the Gimbal Page. Gimbal works great and there's one less wire running through the middle of the SD6.
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Basically I followed the photos on this thread:
http://www.multirotorforums.com/sho...T-2D-brushless-Gimbal-and-standard-Phantom-TX