RE: Subtrim versus Trim
Do you guys know why you’re placing the servo arm 90 degrees and or perpendicular to the long side of servo case? If you think equal travel either side of neutral is the answer think again…
Anytime sub-trim, trim or mixes with offsets are used differential or NON-linear travel arcs ensue regardless of travel volume or percentages. Programmable servos have this conundrum beat hands down, there is no competition.
Most TX's do not transmit the defacto industry standard control pulse signal for neutral @ 1500us, nor do servos center on this same defacto standard. Enter sub-trim or even trim. Since not all servos have uneven output shaft spines the ability to rotate the servo arm until such time that your close isn't always an option.