Damaged Duet Wifi



  • I currently own a Duet Wifi and have been using it for a while now to control my homemade 3d printer. However recently I was attempting to wire up a laser driver so that I could use the printer as a laser etcher and something has happened to the Duet.

    If i connect the duet to a pc via USB then the board powers on and i can connect to the web interface as usual with the endstops working as expected. However whenever I power the board from my 24V supply like i normally would, the led next to the wifi module will flash on initially but the board does not connect to the wifi and i'm unable to connect to the web interface. Also the endstop leds (normally closed) turn on initially but then go off and the endstops are unresponsive. The only LEDs that stay on are the blue power LED and the red 5V LED.

    Do you have any suggestions as to what may have happened to my board? What i was attempting to do was power a 12V regulator from my 24V supply and use the output of that as power for the laser with the 5V output from the Fan3 header (I have the fan power jumper set to 5V not VIn) to the 5V TTL input of the laser driver.

    Obviously I've done something to it and i'm assuming it's something to do with the power delivery but it isn't completely dead so i'd rather not have to buy a brand new Duet if there's any chance of fixing it.

    Thanks


  • administrators

    My guess is that something attached to the 3.3V rail is drawing excessive current. Check whether the 3.3V regulator chip (U2, the one with 3 legs on one side and a tab on the other side) is getting hot. If it is, find out what other chip is getting hot.


 

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