getting started, with shut off...



  • Yes, there is a 3.3V and a 5V pin at the expansion slot. For the Duet 0.6 (I have this oldie!) and 0.85 it is Pin 1 (+5V) and pin 3 (+3.3V). See: https://reprap.org/wiki/Duet_pinout. You will need to check if the newer generations duet have a different layout, I don't know... These pins almost instantly generate their voltages. The reason you need to push ON for about 2 seconds is for the M80 command in the config.g to be processed.



  • So M80 is for the ps_on pin / ssr minus?


  • administrators

    @torro said in getting started, with shut off...:

    So M80 is for the ps_on pin / ssr minus?

    Yes, PS_ON is an open-drain output that is pulled low when you send M80 and released when you send M81. So connect the negative SSR control terminal to it. Connect the positive SSR control terminal to any of +3.3V or +5V or +VIN. You will need a mains-voltage push button in parallel with the SSR mains terminals to provide initial power, and a M80 command in config.g to turn on the PS_ON output when you press that button and the Duet starts up.

    In your RAMPS setup you were probably using +5V from the USB port to provide power for the SSR control terminals.



  • Hi,

    Ramps don't need M80.
    5V from an AUX Port to ssr+ and the minus to ps_on pin. And the Button to short the Relais.

    Adding M80 to config.g should not be a Problem 😉

    Thanks!



  • Hi,

    Ramps out, duet in.
    axis movement and endstops correct.
    Bed heating works.
    temp controlled Board fan works.

    No Problems so far.

    Update tomorrow. 🙂



  • which pins could i use to get 5V?
    Best near the ps_on and fan pins. i need 5V for the part cooling fan and for the SSR.

    there are some 5V pins near the fan connectors, V Fan and ext 5V Jumper. could i use one of them for both? or is it better to take one of the LCD connectors and one of the expansion connectors?

    thanks!


  • administrators

    @torro said in getting started, with shut off...:

    which pins could i use to get 5V?
    Best near the ps_on and fan pins. i need 5V for the part cooling fan and for the SSR.

    Are you saying that your part cooling fan has a different voltage from your hot end heatsink cooling fan? Why are they different?

    The SSR driven from the PS_ON pin can probably use anything between +3V and +32V - SSRs are usually marked with the acceptable input voltage range.

    +5V can be found on the expansion connector and on the PanelDue connector.



  • Correct, the voltage from the Part cooling Fan is different. It's a Kind of exotic type. But small and powerful. I will Post a picture from the hotend construction.



  • 2_1544038758854_DSC_0295.jpg 1_1544038758854_DSC_0294.jpg 0_1544038758854_DSC_0293.jpg



  • Hi,

    Shut off works, the ssr positive gets 24V directly from the psu.
    5V Fans are working, too.

    First print was in slow motion. I don't know why. After a reboot, the Speed was ok.
    but not as fast as with ramps.
    speeds in config.g are on the todo list.

    After the heater tuning, i got a message. Heater overpowered or something similar. Should i decrease the pwm?

    Thanks!


  • administrators

    @torro said in getting started, with shut off...:

    After the heater tuning, i got a message. Heater overpowered or something similar. Should i decrease the pwm?

    That message is very common, especially since E3D started shipping silicone socks with their hot ends. Reducing the PWM won't make it significantly safer.


 

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