radio questions ???

[tamiyajoe]

i just got an mx 3 and im confused:

wat are sub trims?wat is "ARC"? wat about "EPA"? and "D/R"? im a litle confused, thanks

[SteveK]

EPA = End Point Adjustment, or how far the servo/ESC travels.

D/R = Dual Rate, and this one adjusts travel in both ways at the same time. Usually only found on steering in most radios.

[Little_Horn]

About sub trims:

First u need to know what trims are. Let's supose that, when u have your steering (transmiter) in neutral, the wheels aren't in the center. U can adjust this with the trims. But there's a problem, because when u center the servo, u have to adjust it to one side, causing the car to steer more to one side than the other.
Sub trims exist to avoid this problem.
With your steering trim in the center, use the sub trim to adjust the neutral point. With sub trims, you can turn equally to both sides.
The same goes for throttle trims and sub trims.

If you find hard to understand this explanation, please read the Futaba 3PK manual. You can get it in www.futaba.com and read all about your doubts.

Hope I could help!

P.S.: This is my first post that actually helps someone (at least, I hope it helps... lol). All the others I posted were to get some help... Reading manuals really helps...