Upgrade your printer: Stepper drivers (BCN3D Sigma)

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

This guide is only for the early Sigma units that don't have the silent driver upgrade.

Content:

X Axis drivers

Y Axis driver

Z Axis driver

Extruder motor drivers

Note: Before starting the upgrade, raise the bed so you can have access to the Z driver, and then, turn off and disconnect the printer.

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 screw the two screws of the Driver holder.

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.

Z-Axis driver

1. Remove the cover by unscrewing the four 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.

Extruder motor driver

1. Remove the metal cover by removing the two nuts.

x2 M3

2. Remove the front spacers and disconnect the stepper motor wire and flat cable from the Driver. Then remove de Driver.

3. Connect the flat cable to the new Driver. Then place the Driver with the same back spacer and connect the Stepper motor wire.

Conclusions

It's important to check the connections of flat cables 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

It's important to keep your printer in good shape to make the most out of it. In this chart, you can find a list of the extruder maintenance procedures and how frequently these should be done. Maintenance Plan

bcn3d-recycle Take your e-waste to a certified recycler. Check how we do it in BCN3D.

Parts		Buy these parts
	Sigma / Sigmax R17 \| R19 Driver YZE	SKU 11931
	Sigma / Sigmax R17 \| R19 Driver X	SKU 11930

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Upgrade your printer: Stepper drivers (BCN3D Sigma)

Improve the performance and enjoy a more silent movement of the steppers with this upgrade

Forum Community

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