Secure TMC2209
Use M2.5 x 6mm long machine screws to secure the TMC2209 to the 3D printed PCB mount.
Place the TMC2209 over the four standoffs on the 3D printed PCB mount with the mounting holes lined up.
Insert and fasten two M2.5 x 6mm long to secure the TMC2209 to the 3D printed PCB mount.
Secure MPM3601
Place the MPM3601 over the remaining standoff on the 3D printed PCB mount with the mounting hole lined up.
Insert and fasten a single M2.5 x 6mm long machine screw to secure the MPM3601 buck converter to the 3D printed PCB mount.
Secure KB2040
Orient the KB2040 dev board with the 3D printed KB2040 mount.
Insert the KB2040 dev board into the 3D printed KB2040 mount so the edges of the PCB are fitted underneath the corner clips.
Mounted Components
Double check the KB2040, TMC2209, MPM3601 and DC jack have been properly secured to their 3D printed mounts.
Stepper Mount
Orient the stepper motor mount with the 3D printed motor mount.
Use 4x M3 x 6mm long machine screws to secure the stepper motor to the 3D printed motor mount.
Connect Stepper Motor and DC Jack
Use the screw-block terminals on the TMC2209 driver to secure the four wires from the stepper motor and the two wires from the DC jack.
- Blue Wire (B-) - 2B
- Red Wire (B+) - 2A
- Black Wire (A+) - 1A
- Green Wire (A-) - 1B
Connect STEMMA QT Cables
Use the short STEMMA QT cable to connect the 1.3in OLED to the rotary encoder.
Connect the long STEMMA QT cable to the other end of the 1.3in OLED.
Connect STEMMA QT to KB2040
Connect the long STEMMA QT cable to the STEMMA QT port on KB2040 dev board.
Circuit Power Test
Connect the adjustable power supply to a wall outlet with the output NOT plugged into the circuit. Turn the voltage knob to set it to 12V.
Connect the DC plug from the power supply to the DC jack connected to the circuit.
The OLED should display text and icons. Use the rotary encoder to turn on the stepper motor and test the various settings.
Unplug the DC plug when testing is complete.
Install Gear to Stepper Motor
Align the 3D printed gear with the shaft of the stepper motor. The flat surface of the gear should be facing up.
Press the gear into the shaft of the stepper motor so it matches the assembly photo.
Controller Case
Use 4x M2.5 x 10mm long machine screws and hex nuts to secure the OLED to the 3D printed controller case.
Line up the OLED with the mounting holes on the 3D printed controller case.
Secure the OLED Display to the Controller Case
Place the OLED into the controller case with the mount holes lined up.
Insert and fasten the four M2.5 x 10mm long screws through the controller case and OLED mounting tabs.
Use the M2.5 hex nuts to secure the OLED to the 3D printed controller case.
Secure Rotary Encoder to Controller Case
Insert the knob of the rotary encoder through the hole from the inside of the 3D printed controller case.
Use the included hex nut to secure the rotary encoder to the 3D printed controller case.
Secure Frame to Bottom Plate
Orient the 3D printed case frame with the bottom plate.
Place the case frame over the bottom plate with the four mounting tabs lined up.
Use four M3 x 6mm long machine screws to secure the two parts together.
Add the rubber feet to corners of the 3D printed bottom plate.
Attach Controller Case to Bottom Plate
Use two M3 x 8mm long machine screws and hex nuts to secure the 3D printed controller case to the bottom plate.
Secure Controller Case to Bottom Plate
Slide the 3D printed controller case into the designated spot on the bottom plate with the two mounting holes lined up.
Insert and fasten the M3 x 8mm long machine screws through the two parts. Use two M3 hex nuts to secure the two parts together.
Secure Motor Mount to Bottom Plate
Place the 3D printed motor mount into the bottom plate with the designated mounting holes lined up.
Insert and fasten four M3 x 6mm long machine screws through the motor mount and bottom plate.
Secure KB2040 Mount to Bottom Plate
Place the 3D printed KB2040 mount onto the designated mounting holes on the bottom plate.
Insert two M3 x 10mm long machine screw through the KB2040 mounting tabs and bottom plate. Use two hex nuts to secure the parts together.
Secure DC Mount to Bottom Plate
Place the 3D printed DC mount onto the designated mounting holes on the bottom plate.
Insert two M3 x 8mm long machine secures through the DC mounting holes and bottom plate.
Secure PCB Mount to Bottom Plate
Place the 3D printed PCB mount onto the designated mounting holes on the bottom plate.
Insert two M3 x 6mm long machine secures through the PCB mount and the bottom plate.
Connect STEMMA QT to KB2040
Double check the STEMMA QT cable is connecting the OLED to the KB2040 dev board.
Power Test
Insert the DC plug from the power supply to the DC jack. Test the circuit using the rotary encoder knob to adjust the various settings to turn on the stepper motor.
The green LEDs should light up on the 1.3in OLED and rotary encoder.
Page last edited January 28, 2025
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