MJWS
Key Veteran
Location: Airdrie, AB - Canada
| Most of the time if I grab a few servos straight out of the box it seems on a four arm horn... They will all be the same arm when I go for a particular angle. Not the end of the world if it isn't.
All we really need is to make sure we are as similar mechanically as possible. Mine were dead equal. A few others have been as well. Haven't done a micro heli with 3110's but I have some on foamies they are good and center well. I'm pretty sure they are like the hitecs, when you rotate 1/4 turn the angle changes.
If the angles are off you introduce differential throws. A little subtrim isn't the end of the world, but if it is much over 10, there is probably a better mechanical solution.
I would bet my paycheck this has nothing to do with your radio malfunctioning. Or any type of latency issues. The only way latency comes into play is with full blistering fast stick movements, and you'll need a scope to spot it. Your eye isn't good enough. You will find that even slow movements of the swash will introduce the EXACT same interaction.
Verify your set up on the bench. When the arms are parallel on a flat surface. They will touch a table at the exact same time when you add collective. You might spot a lazy servo this way. Long arms would magnify this even further. Most of the time servos from the same batch are going to be very similar. But you never know. Long arms and large movements will let you spot the differences. If they are perfect by eye on the bench they are more than adequate on this heli.
The magic is in the angles and linkages. There will always be a little compromise, but it doesn't typically have much effect on flight.
One way to verify. (Perhaps a little out there.) Get a fresh model so you can be certain of no extraneous mixes, trim, or subtrim. Set up your servos and linkages to swash on your bench. Drill a hole for the mainshaft. Hotglue the servos... (Use any method you want. That would be quick for me.) Get the geometry dead on. Should be very easy as there is no heli in the way. Place some bamboo skewers or light carbon rod across the swash so you have very long arms sticking out showing even the slightest interaction. Heck you could measure with a ruler. You'll find when everything is square, and all linkages and arms are equal. It'll work perfectly. Compare it to the actual heli and see where the compromises are. Now we just try and duplicate our 'perfect' set up.
Sometimes if you can see how simple it is on the bench you can move past my radio, or servo's must be broken. It's just cumulative small (or large  ) errors in set up.
Good Luck
Mike |
. Thanks for the info.
It is a combination of mechanics and programming. Not whether your radio is .002ms faster in response.
on the same spline. This REALLY makes it difficult (if not impossible) to get everything equal which is likely contributing to my cyclic interaction.
