Duet Smart Effector LEDs
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I have a smart effector installed and working well on my delta printer with a duet 2 wifi. I have one issue though, as the LEDs intended to illuminate the print / build plate are not working at all, and have not worked since new. All fans are working perfectly (part and hotend fans) and as the LEDs are meant to light up whenever the hotend fan is working, I am not sure what's wrong without fully disassembling the smart effector assembly to check the traces and individual components.
I have tested on multiple duet boards too, not that that should change anything if the hotend fan is working as it should.
Any advice would be appreciated. Has anyone had similar issues?
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@bkdfkup the 3 LEDs are wires in series, also in series with them are 2 resistors. One of the resistors can be bypassed with a jumper for 12V operation. If you do bypass it and you are using 24V power, then the other resistor will probably fuse.
You can find the schematics at https://github.com/Duet3D/SmartEffector/tree/master/SmartEffector. Here's an extract showing the illumination LEDs:
Likely causes of the LEDs not working are:
- No power to hot end fan
- Hot end fan power + and - polarity swapped (but unless you swapped the hot end fan wires too, the hot end fan would either not work or fuse and blow the driver mosfet on the Duet)
- On older Smart Effectors, one of the LED traces was too close to the edge of the board and sometimes got damaged when the PCBs on the panel were separated
- Blown LED (test them using a multimeter on the diode function)
- R8 blown due to running the effector on 24V with jumper JP3 installed (JP3 should only be installed when running from 12V)
HTH David
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@dc42 said in Duet Smart Effector LEDs:
blown due to running the effector on 24V with jumper JP3 in
Thanks for the response, it was absolutely on-point. I will do some testing to try narrow it down.
