Duet Died...again
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@willyd3113
once the overvoltage has been applied to the 3.3V line the board is damaged -
So I should get a replacement?
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you should first find where your wiring is incorrect before you buy a third duet and fry that as well.
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Ok so where are the 3.3 and 5 v pins exposed on the board that I have accidentally touched and overpowered them?
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what did you have connected to the board?
where was the board mounted? -
Check that your hotend wires are not shorted to the heatblock or other parts of the printer. You can use a multimeter to check continuity between leads of the thermistor and heater to each other and to the points around it.
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It's possible that the hotend wires shorted but maybe more likely that I accidentally did something with the fans, I had 2 always on and 2 pwm fans. I had the board mounted vertically to a 3d printed base.
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I had the board working just fine for months prior
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Do you have any devices such as endstops, Z probes or servos that draw power from +3.3V on the Z probe connector or an endstop connector or the expansion connector; or that draw power from +5V on the expansion connector or the PanelDue connector?
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No servos, I had LEDs in the unused extruder slot with that slot being turned into a tool, no problems there. I have 12v fans plugged into buck converters before the duet to make those are ok. No expansion board and no z probe just 3 low end stops 3 pin.
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@willyd3113 said in Duet Died...again:
I had LEDs in the unused extruder slot
Do you mean the unused extruder heater output?
I have 12v fans plugged into buck converters before the duet to make those are ok.
Please explain exactly how you have wired them, and whan position the V_FAN jumper is in.
No expansion board and no z probe just 3 low end stops 3 pin.
What type of 3-pin endstop, and how have you wired them? Any chance they could be shorting against ant metal parts of your printer?
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The v_fan jumper is the same position as it came, the unused extruder output was powering the LEDs though not at the time of death and the 3pin endstop is the same that came with the ender 3 and I haven't had any issues with them and their wiring is insulated from each other.
The fan I had stepped down was connected with thisand the inputs were plugged directly into the always on fan slot.
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Thanks, I'm discussing this with Tim and my colleagues.
