E3d Hotend Fan - power only while heated
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Hey guys,
Anyway to get my Duet wifi to power the E3d V6 hotend fan ONLY when the hotend starts to heat up?
It's a bit annoying and abusive to have the fan spinning at all times, even when the printer is dead cold for long periods.
Intent would be anytime the hotend is over 45º C.
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@tsitalon1 The "T" parameter in M106 is what you are looking for https://duet3d.dozuki.com/Wiki/Gcode#Section_M106_Fan_On. Specifically, in you usage case, add "T45".
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@tsitalon1 Additionally to what @deckingman said, is the fan connected to an 'always on' fan output? If it is, you will need to move it to a PWM fan pins. Then you may need to define the fan and add it to the tool. Knowing which version of the firmware you are running would help (send M115, post response).
Usually, Fan 0 is the part cooling fan, which can be controlled by the slicer, and fan 1 is the hot end fan, controlled by the firmware. This may help you to choose where to connect it.
Ian
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FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 2.01(RTOS) ELECTRONICS: Duet WiFi 1.02 or later FIRMWARE_DATE: 2018-07-26b2
Haven't updated as my system is printing great
I think I am connected to always on for Hotend fan - ok, so move fan to PWM slot and define it...
I may need help defining it.
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@tsitalon1 Take a look at the wiring diagram here https://duet3d.dozuki.com/Wiki/Duet_Wiring_Diagrams. On the right you'll see the PWM fans. In order from left to right, you have Fan2, Fan1 and Fan0 followed by two always on fans. Connect the hot end fan to Fan 1 (Fan0 is usually the part cooling fan). Then use M106 P1 S255 I0 F250 H1 T45 in your config.g which will turn the fan on at full speed when heater1 (the hot end heater) reaches 45 deg C.
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Thank you, this worked perfectly!
