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Old Oct 13, 2011, 04:53 AM
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France
Joined Nov 2003
287 Posts
tests

Hi SimonK,
nice work you did ! Thanks for having shared this with us.
I tried the last version (16Khz) in flight on an Hexa H and a quadri. The motors now run very smoothly (AXI or aerodrive). Motors can now start at very low RPM, they are less noisy (power range set to 900). It reduces also woobles compared to previous converter version.

I tried also the Ultra PWM with a new version of Flyboard I2C converter. Compared to Fast PWM, it reduces even more wooble (as I feel it).

Next step is to try even quicker pulse, like max pulse = 512 usec. Start high during 100 usec period, then the duty between 0 and 512 usec, or even stronger between 0 and 256.
I assume it needs to change the code a bit for that, the duty has to be divided by 2 somewhere to have full power range (currently 900). Do you have any hint for this ?
Thanks
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