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Hartk tool head board question


Well-known member
Building up a switchwire DIY with a Stealthburner tool head. Consuming parts left over from a 2.4 build is my official excuse (ha!).

I have a Hartk toolhead board... wondering about the wire diagram.

The mainboards, they all have a common voltage rail, then stuff like the fan controls turn on by pulling the negative to ground? There aren't enough wires going to the mainboard for a "complete" circuit on all the toolhead fans. Only the fan negative has a wire back to the mainboard.

The mainboard is a Fysetc Spider 2.3 for what it's worth.