Futaba T6XHs its in a plane not heli,,when I try to use the trim adjustment on the throttle it doesnt work ,,trims work only when the throttle is at the midpoint of travel,,ie if the stick is centered the trim works but if its at either end if its travel it barely moves at all--midpoint it travels 1/8~ of an inch at the servo arm ,,I havent found anything in the manual to fix this well, nothing I actually understand anyway.....Rog

This FAQ may help you:

http://www.futaba-rc.com/faq/faq-6xsuper-q94.html

Thanks but that didnt work,,its not either position..it only works in the center not either end point..Rog