ESC wont calibrate

[DHavreluck]

I just got my Spirit Pro and I'm new to electric heli's. After I purchased the Spirit FBL I bought and built an Align Trex 470LM. Everything appears as expected, I have only hovered a few times, stabilization seems flawless. and working nicely but I can't get the ESC to calibrate with SpiritPro. ESC will calibrate with no problem directly with a Spektrum AR8000 and a AR7700 but not with Spirit Pro with AR7700. There must be something about the Spirit that won't allow calibration. I can fly the heli the only problem is the throttle does not engage until 51% stick. For now throttle and pitch curves are linear (0,25,50,75,100). Throttle channel is not reversed. Diagnostic tab under channel input appears correct ( 0-100% low stick to high stick). All trims are zero.

Does anyone know what the issue might be?

Thanks,

Duncan Havreluck
Cambridge Ontario Canada

Align 470LM
DX8G2/AR7700 using SRXL port
ESC (stock) Align RCE-BL50X
Spirit Pro / BT-Android
Savox servos 257/262

[Coco66]

What exactly does not work in calibration?

[ZeXx86]

Hello,

firstly, it is important that you have Governor disabled in the unit (if used).
Can you tell me what Throttle range do you have configured in the General - Throttle/Governor?
Min. and Max. values are important for this - to make it work. Default is 1100 - 1900us which should work with mostly any ESC except CC.

[DHavreluck]

Thank you Mr. Site Admin, I never previously entered the throttle/governor setting area. I made the setting as you described and the ESC calibration initializes as expected and the throttle range now seems correct - rotor spool-up starts at about 12% stick.

Thanks for the advise.

[ZeXx86]

Perfect, thank you for the details!