Hi All,

I am building a large custom 3d printer and I need to power 4x 12v fans to cool the electronics alone, If I were to plug them in all into say FAN1 port, would they all work at full speed? Or would the current be split into each.

Thanks in advance!

Why not wire them directly to the PSU?

Excuse my poor knowledge of electronics! Would the fans not be overpowered?

Would the fans only draw the required amount of current for them or would they need some sort of current regulating system?

If you connect the fans in parallel, then they will all get the same voltage and work at full speed.

However, I question your selection of a RUMBA board, which is old 8-bit technology without a native USB port or Ethernet interface, when you can get a modern 32-bit board with both for less.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

Brilliant, thanks for the tip.

Good question, I'm not sure myself to be honest. Having a very restricted understanding of electronics and being familiar with the ramps 1.4, thought it would be easy to implement + less likely to burn out. I did have a little look around for slightly more advanced controllers, but the truth is I had no idea what to look for and how it would be beneficial.