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7 Nema 23 stepper motors (4Z / 2Y / 1X), but only 3 drivers:
1 x 5A driver for the 4 z-axis stepper motors (all motors wired in parallel and driver set to 4A drive current, so each motor gets 1A)
1 x 5A driver for the 2 y-axis stepper motors (both motors wired in parallel and driver set to 4A so each motor gets 2A)
1 x 2.5A driver (standard 3D printer driver) for the single x-axis motor and driver set to around 1 to 1.5A

The extruder is just a nema17 also running off a standard 2.5A 3D printer driver