OpenBuilds BLOX provides support for 2x Bipolar Stepper Motors, with software-controlled current setting and fault monitoring.

• Motor Max Current: 3.2A
• Motor Voltage: 3V ideally, higher will limit acceleration
• Motor Inductance: 1-2mH ideally, higher will limit max speed

Note: The color codes shown below only apply to OpenBuilds Motors. Refer to FAQ: Identify Motor coils to identify the coil pairs or if you have issues with motors not working correctly.

IMPORTANT WARNING: Note: Never connect/disconnect motors to a powered-up controller. Always turn off power before connecting/disconnecting accessories to/from your BLOX

Wiring NEMA 17 Motors	Wiring NEMA 23 Motors

Faults that trigger FAULT MODE:

• Overcurrent (Adjust current down a little)
• Overtemperature (Adjust current down a little, improve cooling)
• Short circuit (Check wiring, Check motor)
• Low Input voltage (Check Power Supply)

If you encounter a Driver Fault:

• Turn off power
• Resolve the issue
• Give the drivers a few minutes to cool down
• Turn power back on
• Note: The FAULT will persist until both cleared, and power has been turned off and on, to protect the stepper drivers