Heliman450
Well-Known Member
Hi all, I was working on my Blade 450X setting up the AR7200BX and have failed to resolve a longstanding problem.
The first time I checked it out (it was bought RTF), I discovered that the pitch settings were somewhat strange in that 50% stick didn't give a zero degree value. I tried various things but failed to get it better than -1.5. My solution, albeit a temporary one, was to reset the 50% to zero degrees but in so doing lost 1.5 degrees of the -11.0 degrees set in the gyro as the minimum and gained 1.5 degrees on the maximum (originally +11.0).
As I was only using the positive range during my exercises, it didn't matter to me. However, I wanted to return to the issue in due course and that's why I'm seeking some advice. So the problem................
When I select Menu Point G to set the centre points for the servo arms the servos go to the central position to await any fine adjustment. All looks level and the levelling tool confirms it. Stepping through to select each servo arm in turn produces the correct Status LED indications. However, when exiting the final servo and returning to the reference position the three servo arms jump upwards (the swashplate follows this too when the links are connected). I checked with my digital pitch gauge in position and as each servo is selected, zero degrees are maintained. The pitch measurement drops to -2.0 degrees when returning to the reference position. During this process the collective stick remains at zero input.
I went through the setup twice and checked through once without disconnecting the servo arms/links. At the moment, I'm of the opinion that it's an internal problem with the gyro, maybe firmware? I can continue with my temporary fix but longer term want to get to the bottom of the problem. It now shows -7.5/+0.3/+13.0
Any input will be gratefully received.
The first time I checked it out (it was bought RTF), I discovered that the pitch settings were somewhat strange in that 50% stick didn't give a zero degree value. I tried various things but failed to get it better than -1.5. My solution, albeit a temporary one, was to reset the 50% to zero degrees but in so doing lost 1.5 degrees of the -11.0 degrees set in the gyro as the minimum and gained 1.5 degrees on the maximum (originally +11.0).
As I was only using the positive range during my exercises, it didn't matter to me. However, I wanted to return to the issue in due course and that's why I'm seeking some advice. So the problem................
When I select Menu Point G to set the centre points for the servo arms the servos go to the central position to await any fine adjustment. All looks level and the levelling tool confirms it. Stepping through to select each servo arm in turn produces the correct Status LED indications. However, when exiting the final servo and returning to the reference position the three servo arms jump upwards (the swashplate follows this too when the links are connected). I checked with my digital pitch gauge in position and as each servo is selected, zero degrees are maintained. The pitch measurement drops to -2.0 degrees when returning to the reference position. During this process the collective stick remains at zero input.
I went through the setup twice and checked through once without disconnecting the servo arms/links. At the moment, I'm of the opinion that it's an internal problem with the gyro, maybe firmware? I can continue with my temporary fix but longer term want to get to the bottom of the problem. It now shows -7.5/+0.3/+13.0
Any input will be gratefully received.