I have two aircraft - a Parallax Elev-8 quadcopter and a Tarot FY680 Pro hexcopter; both aircraft use an APM 2.6 flight controller/autopilot. I'm using an APM Power Module to supply power to the controller, GPS, compass and telemetry transceiver. Both aircraft have a Tarot 2 axis gimbal and video transmitter.
I've been dealing with poor endurance times on my Elev-8 quad and decided, based on all up weight, that it is underpowered with the 1050kv motors supplied with the kit, so I've decided to replace them with Tarot 4006 620 KV motors (please, don't flame me over my choice of motors!). I'm using 30 A OPTO ESCs, so I've decided to use a UBEC to supply power to the gimbal and vtx - the UBEC will plug nicely into spare plugs in the power distribution harness, so I'm not anticipating any issues.
The hexcopter is another problem. I've drawn power for the gimbal and vtx from the balance plug of my 4S lipo battery - this has worked well, but all of a sudden my gimbal motors are not responding when I power up the aircraft. The gimbal control board led indicates that it has successfully initialized but the camera hangs limp as the gimbal motors do nothing.
I suspect that perhaps drawing power for the gimbal directly from the balance plug might be a problem, so I've decided to also use a UBEC for the gimbal and vtx. I have a new gimbal that I will assemble and install on the aircraft. Now, here's my problem:
The Tarot doesn't have a power distribution harness like my Elev-8 - the bottom chassis is a ckt board that has solder points for soldering power/gnd leads from each motor directly to the chassis. I don't want to disassemble the aircraft in order to get to the solder points, so I'm thinking of plugging the UBC into the balance plug. Does anybody see any problems with doing this?