LibrePilot Forum

General Category => General Discussion => Topic started by: andregcoimbra on January 03, 2022, 01:52:26 pm

Title: Configuration board(brushed) for quad
Post by: andregcoimbra on January 03, 2022, 01:52:26 pm
Hi,

I bougth a board (CC3D Brushed - use MOSFET 7700 at https://www.aliexpress.com/i/32914962436.html) for brushed motor. The firmware was updated well but a can't get the configuration to work. I have tried few values to bankupdatefreq, channel max, channel neutral, channel min, but without success. The motors keep always on and don't respond to throtle. Someone alredy work well at this board?

Tnks!
Title: Re: Configuration board(brushed) for quad
Post by: TheOtherCliff on January 04, 2022, 06:15:26 am
You must make some direct settings using System->Settings to make PWM for brushed motors work.

Be aware that you control a BANK which is a set of outputs.  You do not set up the PWM rate of the outputs individually, but as a set of outputs.  Look at the top of the Output page to see what bank controls which outputs.

Here is a thread that we point to when someone wants to do this.  :)
https://forum.librepilot.org/index.php?topic=1597.0

Let me know if this gets it working for you.
Title: Re: Configuration board(brushed) for quad
Post by: andregcoimbra on January 04, 2022, 10:46:20 pm
Hi Cliff,

Thank you a lot!
The configuration below work. Now I will tune others settings to fly smooth.

System tab > UavoBrowser > ActuatorSettings
bankupdatefreq = 1000Hz
channel max = 2000us
channel neutral = 5 us
channel min = 0 us
Title: Re: Configuration board(brushed) for quad
Post by: TheOtherCliff on January 05, 2022, 04:56:53 pm
If you are using "bankupdatefreq = 1000Hz" then the longest "channel max" should be 1000, because if you turn on a 1000us pulse every 1/1000th second, then it is always on.  You can't have a channel max longer than 1000us.