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Published 20 hours ago • verified publisher icon codiac2600

SKR MK3s wire guide

Open MarcoZ76 opened this issue 4 years ago • 3 comments

Hi! If you want the hotend cooling fan switch on when it's over 50°C (or what you chose in the firmware) you should wiring the fan to the HE1 pin (P2_04) and change the guide like below: Schermata 2020-04-11 alle 20 09 52

MarcoZ76 avatar Apr 11 '20 18:04 MarcoZ76

Thank you. In the video they discuss it but very briefly and not very clear for a newbi To marlin. It was easy to figure out once i realized i was using the always live plug and i could run my fan off the hot end port and have control. Shame you cant control the fan ports.

reallost avatar Apr 11 '20 19:04 reallost

Please remember, FAN0 and FAN1 are always on. E0 and E1 can be controlled via firmware.

flow23 avatar Jul 17 '20 09:07 flow23

These connectors switch PIN2 with a MOSFET to ground, if you want to use the Prusa (or Sunon) fans normally used in Bear, then you should not use the other pion (PIN1), as that is connected to VBB (=12V/24V). Instead I would use a pin with 5V or NPWR (the power from the 5V DCDC board used to power Neopixels).

Is that a good idea? Is the 5V "polluted" by the fan, should I add a diode/capacitor?

ruedli avatar Jul 24 '20 19:07 ruedli