Knowledge base - BCN3D

Sigma + Sigmax

Troubleshooting

How to replace the X, Y, and Z drivers (BCN3D Sigma)

Tools
	Allen key 2.5 mm
	Allen key 2 mm
	5.5 mm Socket driver

This guide will help you replace the X, Y, and Z driver boards in case you need to fix any of the issues related to them.

Replacing X-Axis drivers

Replacing Y-Axis driver

Replacing Z-Axis driver

Note: Before replacing any driver, turn off and disconnect the printer.

sigma-turn-off-1

sigma-turn-off-2

Replacing X-Axis drivers

1. Remove the two Allen screws of the Driver holder.

x2 M3 8mm

2. Disconnect the flat cable and the other connectors.

3. Remove the two screws and washers of the Driver.

x2 M3 6mm

4. Assemble the new Driver with the spacer and holder with the same screws and washers in the same way as it was before.

5. Connect the flat cable and the other connectors to the Driver, and tighten back the two screws of the Driver holder.

Replacing the Y-Axis driver

1. Remove the two nuts and washers that are holding the Driver.

x2 M3

2. Disconnect the flat cable and the other connectors.

3. Connect the flat cable and the other connectors to the new Driver.

4. Assemble the new Driver in the correct position with the same spacer as it had before.

Replacing Z-Axis driver

1. Remove the cover by unscrewing the four marked screws.

x2 M3 8mm

x2 M3.2 9.5mm

2. Remove the two nuts and washers that hold the Driver.

x2 M3

3. Disconnect the flat cable and the stepper motor wire.

4. Connect the flat cable to the new Driver.

5. Assemble the new Driver in the correct position with the same spacer as it had before and then place the washers. Tighten the nuts and connect the stepper motor wire.

Conclusions

It's important to check the flat cable connections before powering up the printer, you will find more information about this here: How to check flat cable connections

Forum Community

Need more tips, check out our forum community for more info about this

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