Hi,

I am planning to build a large 3D Printer using a CNC kit.
The build volume is aroung 500mm x 500mm x 200mm.
It will have 4 Nema23 motors, 2 Nema17 motors.

Regards,
Hughe

That sounds like a good application for Duet 3 MB6HC.

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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].