Ender 5 Plus Duet 3, OUT 0 Fuse Popped
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Hello, I just converted my Ender 5 Plus with a Duet 3 MB6HC. When I was installing my heated bed, I read in another post I was not supposed to use a Mosfet. So after hooking it up to the board, I did a PID Tune, however the test failed after heating up once, so I tried heating it up, nothing. I checked OUT0 in, 24v, so I checked the fuse, does this mean the bed is using too much power if so, how would I wire it to not overdraw power?
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@tratoon I`m using an ender 5 plus bed directly to a 6HC and I have had no issues with it, I would suggest checking your wiring/thermistor/bed heater before doing anything else.
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@jumpedwithbothfeet could you quickly confirm your wiring. Mine is Psu to the out0 in, and out 0 to the yellow plug the hotbed wire goes to, flipped orientation, neither works
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@jumpedwithbothfeet just replaced the fuse, when I start the heating process I tell it to go to 30c to test. However I get heater fault heater is slower than expected so I run pid tune using m303 h0 s75 and then the fuse pops, so something during tuning pops breaker
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@jumpedwithbothfeet
this is my wiring -
@tratoon My wiring is exactly the same, even down to the plug, have you checked the heater/thermistor yet? just measured my heater resistance at the plug its reading 1.6 Ohms also at 24v
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@jumpedwithbothfeet I got my resistance it is 1.65 ohms and my thermistor is showing an accurate reading
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@jumpedwithbothfeet how can I troubleshoot it, will the mosfet ok if so how do I wire it
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undefined TRATOON marked this topic as a question 18 Sept 2022, 17:06
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- If you set your multimeter to measure resistance and short the multimeter leads together, what reading do you get?
- If you disconnect the bed heater wires from the Duet, can you measure any continuity between them and Duet ground?
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@dc42 1. 0.1ohms resistance
2. I’m not quite sure what you mean, where is duet ground? -
@tratoon said in Ender 5 Plus Duet 3, OUT 0 Fuse Popped:
- I’m not quite sure what you mean, where is duet ground?
The VIN- terminal on the Duet is one option.
I can think of
two reasons why bed heater fuse might fail
three reasons why bed heater fuse might failAmongst the reasons (https://www.youtube.com/watch?v=Cj8n4MfhjUc) I can think of why the bed heater fuse might fail are:
- Bed heater resistance too low. The bed heater fuse is rated at 15A, so a bed heater with a lower resistance would blow it, eventually. It would take a much higher current than 15A to blow it quickly.
- Short between bed heater and ground. [That's why I asked you to check for continuity.]
- Incorrect bed heater fuse fitted.
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@dc42 the hot bed resistance is what it is supposed to be ,neither of the heater wires are continuous with vin-, the heater wires are continuous with each other not sure IF this is bad, did you send wrong YouTube video this is about Spanish Inquisition
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@dc42 it is fitted with15amp fuse
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@TRATOON we are running the bed very close to the 15amp fuse limit (24v/1.65 =14.54amp) if you don't have a ground (VIN- to heater) and you have continuity between the heater wires, and you have the correct fuse fitted, it sounds like you're pulling enough amps to pop your fuse, I`m not a qualified electrician but I believe your choices are -
- change the bed
- increase the resistance
- fit an external relay/mosfet to control the bed.
- better quality fuse (15amp)
- use a 12v PSU
I can`t say which is the safest/easiest/cheapest way, others will chime in, I hope.
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@jumpedwithbothfeet How would I wire the included creality mosfet to the duet 3?
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@tratoon is it this mosfet?
https://www.3djake.uk/creality-3d-printers-spare-parts/mosfet-for-cr-10s
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