ORIGINAL: PilotLight
ORIGINAL: Jason 3-Danhakl
http://manuals.hobbico.com/hmx/hmxm1012-manual.pdf
Set up manual for the HM4000
FYI there is a hidden trim pot under the label right next to the gain pot. Also when you change gain there is going to be a slight trim drift. So find the gain setting you like and leave it in HH mode all the time. 45% on a Futaba seems to work really well on the AXE 400.
Jason
Jason, what does this hidden pot do? What is its label? Why is it hidden? Most gyros have a gain pot and a travel pot. Doesn't the travel pot adjust how far the gyro will drive the servo? Its basically an end point adjustment. It shouldn't change the centering point on the servo. Hmm, let us know...
Thanks.
The HM 4000 has a gain pot. The newer versions have a trim pot also that is under the label as Sal's picture shows. There is no limit pot. Limit is adjusted by the servo arm length. Piro rate is controlled by EPA or ATV whichever your radio has. If you center all your trims and center your servo with just the rudder channel that will make any gyro perform much better. Once you have the servo centered add the gyro back into the circuit. Then with the HM4000 adjust the trim pot till the servo is centered exactly where is was centered with just the radio. That will give you the best performance.