After hours of trying to reduce vibrations in the Alien H4 680mm quadcopter drone, I’ve decided to order two new motors. I’ll be replacing the two motors on the rear of the craft. Despite all the attempts to balance the motors, especially motor #3 (left rear), I’m taking a guess that one or both of the motors are damaged from the crash, or even perhaps the first flip. The vibration is practically visible on motor #3. I can see the landing gear visibly moving. Touching or even getting close to touching arm #3 “tickles.” It is obnoxious and no wonder I can’t capture any decent video.
Two new motors are on the way on the slow boat from China. I will balance them before installation, which I should have done before. Once the new motors are installed I’ll tear apart the old ones and check to see if the bearings or the prop posts are broken or bent. That would cause the vibration problems. If I can fax them, then I’ll have a couple of extra motors.