ESC duty cycle on the ELEV-8

jmheneghan · 2020-04-29 22:05

I own an Elev-8 (version 3) drone that I am modifying. I'm using the ESC's that came with the drone. The ESC PWM base frequency is 400 Hz (2500us period). My question concerns the PWM duty cycle range. The standard duty cycle range is 1000us (1ms) to 2000us (2ms).
What duty cycle range does the ELEV-8 actually use? Somewhere, I have seen reference to a range from 700us to 2000us. What are the min and max duty cycles that will work with the ELEV-8 ESC's?
Thanks

Publison · 2020-04-30 00:01

There were three versions of ELEV8. Vers 1 and 2 used the Hoverfly Prop based control board. Version 3 came with the Parallax designed Propellor based controller. I can't answer the question directly, but here is the source for the Ver 3:

https://github.com/parallaxinc/Flight-Controller

xanadu · 2020-04-30 02:37

From https://github.com/parallaxinc/Flight-Controller/blob/master/Firmware-C/prefs.cpp

  Prefs.MinThrottle = 1040 * 8;     // Values are in 1/8us resolution, full range is 1000us to 2000us, however many ESCs behave abnormally at the extremes
  Prefs.MaxThrottle = 1960 * 8;
  Prefs.CenterThrottle = 1500 * 8;
  Prefs.MinThrottleArmed = 1140 * 8;

Be sure to calibrate your ESCs.

ESC duty cycle on the ELEV-8

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