No Temp readings anymore
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I'm glad to hear that the fuse protected the Duet WiFi from damage! Over the years I've heard of a number of Duet boards burning out the processor and one other component, due we believe to shorts of this nature. That is why we added the fuse.
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This attention to detail is what keeps me in the duet camp. Thanks, David et al.
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Hi, i have the same issue (while working on exchanging a hotend …)
My F1 measures ~100 ohm, probably this is too much.
What type is the fuse exactly?Thanks and Regards,
Jan
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The resistance should be no more than 5 ohms. The part number is listed on the wiki. There is also a Littlefuse part that we used on the pre-production boards and is suitable.
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I've just gone and blown my fuse F1, found this info really helpful and quickly identified the fuse, thanks really helpful info.
Nozzle caught on my table glass clip, which some how caused the fuse to go. I've checked the thermistor's and they read around 80K and the Hothead its about 14Ohm and bed aroundt 5/6Ohm, so no obvious shorts. Not having much fun with this 3d printer game.
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Check the circuit between the heatblock and the thermistor and between the heater block and the heater cartridge. The heater cartridge could have failed in a manner that makes the heater block have VIN present on it.
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Check the circuit between the heatblock and the thermistor and between the heater block and the heater cartridge. The heater cartridge could have failed in a manner that makes the heater block have VIN present on it.
I checked my heat block, no vin, but I did see 60Ohm from heatblock to thermistor, not sure if that sounds right.
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Hmm a circuit between the heatblock and a thermistor wire is not right. To confirm can you make sure the thermistor is not plugged into the board when you test it.
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Hmm a circuit between the heatblock and a thermistor wire is not right. To confirm can you make sure the thermistor is not plugged into the board when you test it.
Thermistor wasn't plugged in when I tested. Just ordered a replacement fuse, but before it arrives I'll disassemble the hot end as I assume thermistor must have shorted to hot end.
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That appears likely.
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That appears likely.
Many thanks, thermistor shorted to hot end, I've switched to a screw in type as this is the second issue from thermistor shorts. Replacing the fuse was a fun job even with my reasonable soldering skills.
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Great you have got to the bottom of that, and good skills on the soldering!
The cartridge type thermistors that e3d use on their hotends are much easier to mount.
