[PD] pd/arduino pwm > servo motor
info at timvets.net
Fri Oct 20 02:52:14 CEST 2006
I have a servo motor which is to be driven by pduino / Arduino.
The following firmware directly uploaded to the arduino (near bottom of
With some modifications the motor moves between 2 positions smoothly enough.
However, trying the same from pd using the pduino (fermata) firmware and
the arduino help pd patch, it's quite a different story.
The pulse-train needed for the PWM control of the servo motor seems too
irregular (due to pd/comport timing?) such that the motor is not
positioned cleanly but jumps around. (at least, that's my interpretation)
I tried both sending PWM from ports 9,10 or 11 (the Amtel-built-in pwm)
and generating some software pwm on other digital out ports.
Is there a way to get rid of this jitter?
( last attempts were running pd 0.39.2 on ubuntu, comport from:
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