M569 Default T parameter?
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My Servo driver for my extruder in my concrete printer is missing steps. What is the default T parameter for the M569 command?
Kulitorum
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Scope gave the answer - T0.15, right?
Kulitorum
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So I was trying to figure out why my servo did not get the signal, and I noticed the voltage of the step/direction signals are only 0.3v. What can explain that?
Kulitorum
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My bad, the probe was set at x10.
Still, I am getting 3.3v, can I get 5v?
Kulitorum
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You can't get 5V directly because the signal levels on the Duet are 3.3V. However, most external stepper drivers will work with 3.3V signals.
External stepper drivers typically need a 1 to 2 us pulse, which you should configure in the M569 commands for the driver numbers concerned.
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Cool, but what is the default T value for the M569 command?
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I just ordered some breakout boards, I think they should solve the problem.
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The default step pulse width is guaranteed to be long enough for the on-board drivers but is otherwise not defined and likely to change between firmware versions.
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Michael, the data sheet of the servo driver should have a minimum pulse width, best to use something slightly longer in M569
