3gx/spektrum advice please

[JamieD]

Hi. I'm running a DX7s with stock align 600efl pro running mini 3gx. When I switch between flight modes from normal to idle-up 1, the heli drops slightly and the pitch range is off by around 2 degrees. This in normal mode the pitch range is +12 to -12 but in idle-up the pitch range changes to +10 to -14 ish. Why is this? The pitch curve on both flight modes is the same. The swash mix doesn't change between the two flight modes.

[GIXERMAN]

Is your setup zero at mid stick in both mode if so there is a problem at 3/4 stick where your hovering. You can check on the bench in hold or motor if not using a step bec.

[JamieD]

nope. At mid-stick it drops by a couple of degrees when I stich into idle-up. It also does the same when I switch into throttle hold.

[JamieD]

I wonder if it is some kind of compensation between the different head speeds? 3gx is up to date on its firmware.

[GIXERMAN]

nope. At mid-stick it drops by a couple of degrees when I stich into idle-up. It also does the same when I switch into throttle hold.

The values in the pitch curve norm idle and hold must be different then.for swash to move

[JamieD]

nope, the pitch curve graph and the numbers for all flight modes are the same 0,25,50,75,100. The numbers in the swash mix menu stay the same. When I switch between modes, the swash drops by two degrees throughout the entire pitch range. This is also reflected on the DX7s display, you can see the pitch, ele, aileron drop when switching. I can't see any mixing that might be active either.

[tomatwalden]

If it changes in the TX too, then you must have something awry in your DX7. What about dual rates or expo?

[JamieD]

Same d/r and expo for all settings.

[tomatwalden]

Travel and trims?
One thing to try is to copy your 600EFL settings into another (completely clean) memory slot in your DX7 and rebind. Sometimes that can be the quickest way to fix obscure problems like this ...

[cjcj1949]

Sometimes the readings the software tells you are not the same as you get. As mentioned it could be a trim problem as trim settings are different for each flight mode. Starting a new memory and reprogramming from scratch may be the easiest way to sort it. I'd check the outputs on the monitor screen.

[JamieD]

OK I've found it! I had the auxillary knob as pitch adjustment in the model switch settings. De-activated it and now there's no problems :-).

case closed.

Thanks to Horizon for their support.