ArrowNaughtic,
Time for some bench testing. Disconnect the tail motor. Grips off. Spool up in hand, if you feel any vibration at all,(mark one flybar paddle), move flybar left or right, about a 1/8 inch, doesn't matter here. Spool up in hand, if the vibration gets worse, move the other direction and keep doing this until there is NO vibration. Distance of the paddles from the head don't fall into the equation on the smaller helis. Weight is the key here, BALANCE. I had one, that the distance of the flybar from the rotor head was 1/4 inch off being centered, but there was zero vibration.
Install the grips and spool up again, if you now have a vibration problem, then one of the grips is heavier than the other. Just a few grams can make the difference.
Hope this helps, at least for starters and that you have a gram scale.
Dave / Choppersrule
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ORIGINAL: ArrowNaughtic
Now i am remembering why i set the Blinged CP on the shelf. Crash will testify that i had my fair share of issues with the HDX300 CNC head as will choppers and most of the other band of brothers. Well, it seems I still have not found the problem. New main shaft, new spindle, new bearings and i just can't seem to actually find the source of my wobble in the upper rotor head. Without the blade grips on I get maybe a very slight wobble from side to side in the rotor head itself (almost imperceptable. As soon as I install the blade grips and spool it up it acts like the spindle is bent (blade grips move up and down slightly while the head is turning at about 400RPM) It does smooth out but with the autorotation hub and trued main gear as it spools down it about shakes the heli apart with the added weight of the blades on. Trying to fly it this way creates bent main shafts in about 1 second. So........ I am here to seek the expertise of the collective mind.
None of the CNC parts are bent that I can tell....... I may order a new upper rotor head but really don't want to go that way if i don't have to. There is no physical way to bend the blade grips that I can tell and i actually find it hard to believe that the upper rotor head can also be bent. There isn't enough hours on that head to suggest worn dampeners (O rings) so that is really what has been puzzling me. Bent links? Magical voodoo? Not enough Wild Turkey?? Wheeeeeeeeeeeeeeeeeeeeeeeeeeeeee.................. ......... CNC............heh
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Of all the things I ever lost....................................... I miss my mind the most!