Duet & Duex5 in E3D ToolChanger - Every Other Fan Header Dead
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I recently got hold of E3D's toolchanger platform, on first power up I noticed I couldn't get all but one of the hotend fans to spin.
The way the machine is structured is it allocates 2 fan pins per tool, one for the heatbreak cooling and one for the part cooling fan. If I swap the connectors for the part cooling fans with the heatbreak fans all the heatbreak fans come on. It also turns out the one that was spinning was wired wrong, I had the PCF and HE fan's switched, though, interestingly that part cooling fan is fully dead, as in I can't get it to spin even on a bench supply, it takes no current.
So, I broke out a multimeter and measured the output from the duet.
M107 (P0 to P8)
Pin Voltages -
Duet
P0 0.6-0.8v
P1 0.6-0.8v
P2 0v
Duex
P3 0.6-0.8v
P4 0v
P5 0.6-0.8v
P6 0v
P7 0.6-0.8v
P8 0vM106 (P0 to P8) S255
Pin Voltages -
Duet
P0 0.6-0.8v
P1 0.6-0.8v
P2 24v
Duex
P3 0.6-0.8v
P4 24v
P5 0.6-0.8v
P6 24v
P7 0.6-0.8v
P8 24vWhat's likely happened here?
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The heatsink fans are configured to turn on thermostatically. So they won't turn on unless the heatsinks are hot enough. For testing purposes, include H-1 in the M106 S255 command to disable thermostatic mode.
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Oh..
okay, yes - that's all this was.I don't know why you're answering idiot questions at 10pm, but I'm glad you are.
Thanks!
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No problem!
