BTT MMB
Max filament units: 4
MCU Name: 3ms
BOM
| Name | Price | Quantity | Link | Notes |
|---|---|---|---|---|
| BTT MMB | $34.99 | 1 | BTT | |
| Duponts | $9.99 | 1 | Amazon | These wires are only sufficient to run steppers, not heaters |
| 12V PSU | $7.39 | 1 | Amazon | This PSU is only sufficient to run steppers, not heaters |
Wiring
Route the wires from the NEMA17's to the controller board. Follow this table to determine which port to plug the motors into:
| Filament Unit # | Motor Port |
|---|---|
| 0 | M1 |
| 1 | M2 |
| 2 | M3 |
| 3 | M4 |
Now, grab your 12V PSU and two M-M duponts, one red and one black (M-M means that there is metal coming out of both ends of the cable). Plug the PSU into the wall, but don't plug the screw terminals into the PSU (the screw terminals have green)
- Plug the red wire into the positive terminal of the screw terminals
-
Plug the black wire into the negative terminal of the screw terminals
Danger
These dupont cables are too thin to run much more than the stepper motors. If you run a heater or other power-intensive device off of the MMB board, the duponts and/or PSU can melt/catch fire. To reduce the risk of this, you can double up on the duponts or get thicker wires.
-
Following this image, locate the HVIN and GND inputs (top left)
- Route the two wires inside closest to the HVIN and GND inputs
- Using the markings on the board, plug the red wire into the HVIN terminal on the MMB
- Using the markings on the board, plug the black wire into the GND terminal on the MMB
-
Verify all connections
Warning
If the wires are plugged into the wrong place, or swapped polarities, your MMB, Stepper motors, and/or PSU can be badly damaged.
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Plug the PSU screw terminals into the PSU wire
If the MMB lights up, you wired it correctly!
Finally, plug the MMB into your Klipper host with the cable that came with it.