Topic: current draw of stock SD3 extruder heatcore
Any body know? I measured the voltage ,it's at ~12.3v .Before the resistor fried it measured 2.6 ohm. Is that about right or not?
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SoliForum - 3D Printing Community → Electronics & Hardware → current draw of stock SD3 extruder heatcore
Any body know? I measured the voltage ,it's at ~12.3v .Before the resistor fried it measured 2.6 ohm. Is that about right or not?
That seems a touch low. The original nichrome hotends were around 6 ohms.
SD 3 tech specs says: Nichrome powered extruder, here is what mine looked like
no, it should have been 6 ohms.
the fact that it was 3 likely means that the insulation on the nichrom inside teh heatcore failed and it shorted to itself, then draws more current and heats more (and too fast) and the insulation fails even fast over the rest of the wire, and the solder joints fail also...
if thousl be 6Ohm.
drawing 2 Amps, for 24W power.
the stock power supply is able to power a bigger heater.
That photo is the resistor type, not a nichrome heat core.
Good news, really - the resistor's a lot less trouble to replace.
SoliForum - 3D Printing Community → Electronics & Hardware → current draw of stock SD3 extruder heatcore
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