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ESC for quadricopter

PostPosted: Wed May 23, 2012 7:56 am
by salviador
Hi Tom , sorry , another question/doubt.
I must choose specific ESC for quadricopter?
Because, if control of the pid has a refresh rate up to 200 Hz and the standard ESC has a input control equal to servo refresh 20mS (50Hz) with impulse 1~2mS.
Are there possible problems of control? the out of pid (200Hz rate) is too fast for esc.?

Re: ESC for quadricopter

PostPosted: Wed May 23, 2012 5:36 pm
by Tom
Most ESC's support this. Most people use "plush" or similar ESC's from hobbyking. They are cheap and work good.

TOm

Re: ESC for quadricopter

PostPosted: Thu May 24, 2012 2:11 pm
by lukasz
Also there are ESC that you can reprogram to 400MHz and use fast pwm.

This is what I've done with Tower Pro 18A ESC.

Here is the link to a list of ESC that can be reprogrammed:
https://docs.google.com/spreadsheet/pub ... alse&gid=0

Here is the link where you can download fast PWM firmware:
https://github.com/sim-/tgy/downloads

Here is the link to tutorial:
http://wiki.openpilot.org/display/Doc/F ... structions

Re: ESC for quadricopter

PostPosted: Fri May 25, 2012 1:15 pm
by Tom
This won't be necessary as the gluonpilot currently works at max 250Hz in quadrocopter mode