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codiac2600 / SKR-MK3s-V1.4-Beta

Beta SKR V1.4 firmware for the Prusa MK3s Bear
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SKR MK3s wire guide #16

Open MarcoZ76 opened 4 years ago

MarcoZ76 commented 4 years ago

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

reallost commented 4 years ago

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.

flow23 commented 4 years ago

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

ruedli commented 4 years ago

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?