Not a new guy with Tri-Copters and have solved spinning issues in the past. But, this time I’m stumped.
I’ve been flying my copter for about a year with a PX4 - ver 2.4.8. A few weeks ago Mission Planner told me to either downgrade my version of MP or upgrade my copter Arducopter firmware. Yes, this a QGC forum and I’ll get there. So, all attempts to upgrade the firmware through MP proved futile. Never have I had an issue like that. This brings me to QGC. Fired up QGC and was able to easily upgrade the firmware. Shrug!!
Currently using v. 1.6.1dev and have selected Tri-Copter Y+ configuration. This is a little concerning given there’s a Y+ and a Y- configuration as typically we like to run two motors in one direction and a third in another.
Quickly determined this firmware has different expectations for motor hookup. Instead of ch1 (front right), ch2 (front left) and ch4 (tail) with servo on ch 7 it appears to use channel 1, 2, 3 & 4 (servo). That’s easy enough. Current configuration is Front Right spinning CW on CH1, Front Left spinning CCW on CH2, Tail spinning CCW on CH3 and tail servo connected to CH4.
Issue: Copter spins CCW on takeoff.
Typically to fix this I reverse the servo channel. In this case I changed RC4_Reverse from 1.0 to -1.0. Unfortunately the copter still spins CCW. What reversing the channel appears to do is change my arming. Set to -1.0 I have to hold the throttle stick (Left, Mode 2) to the lower left (vs. lower right).
Anyone else experiencing this? Any ideas what I’m doing wrong? Do you want me to provide any additional info.
Thanks in advance.