Wiring Pt. I





Time Required

X Minutes



Throughout the sections on wiring, I’ll be referring to the schematic provided by East 3D in their manual. I’ve included a picture below, though you can also find this in your printed manual or in the PDF.

Clean, neat wiring takes time. Go slow. plan the wire routes and don’t tie anything down till the end. I used more zip ties and stickies (the sticker hold downs for zip ties) than what East 3D provided. Therefore you may want to get extras.

Finally, as you will soon learn, there are several parts and places where we can upgrade and modify the machine to make the wiring neater, cleaner, better routed and more mechanically secure. These possibilities aren’t covered here, I tried to stick with how one would build the machine from the kit. In the upgrade section I’ll add modifications I make.

Wiring Schematic

Step 0

Gather your tools and materials

  • For the wiring effort, you may want to use a couple different sizes of screw drivers, both flat and phillips.
  • You may also want micro cutters for snipping zip ties.
  • Have plenty of zip ties and stickies available to use.

Step 1

Install Flat Ribbon Cable to Display Module

  • Ribbon Cable (1x) C Level Foam.
  • Small flat blade screw driver (or long fingernails).
  • On the control board and on the display module board, locate the connector for the flat ribbon cable. Gently flip up the black latch on each board.
  • Position the flat ribbon cable such that the metal contacts are face down on the printed circuit board and slide the cable into the connector. The blue portion of the cable should be visible as shown in the picture. Do this on both boards.
  • Flip the black latch on each connector back into the locked position. Again, this should not take much force.
  • Go ahead and carefully bundle and wire wrap the ribbon cable.

Step 2

Install Heat Sinks on the Control Board

  • Large Heat Sink (2x) C Level Foam
  • Small Heat Sink (2x) C Level Foam
  • On the Lerdge control board, identify the four motor controllers. These are the four add-on boards inserted in the Lerdge main PCBA.
  • The large heat sinks will go on the left two motor drivers.
  • The small heat sinks will go on the right two motor drivers.
  • Each heat sink has a sticky back, peel off the sticker and then carefully place the heat sink on the proper driver board.
  • Ensure the heat sinks are centered on the motor drivers and that the heat sink itself is not touching any of the metal pins on the driver PCBA.

Step 3

Plug in Control Board Cooling Fan

  • Find the cable attached to the control board cooling fan.
  • Plug the white connector of the cooling fan into the 2 pin header in the upper right of the control board. Align the red wire to the + label and black wire to the - label on the control board.

Step 4 - Optional

Install Heat Bed Control Cable

  • Locate the cables that came with the Mosfet driver board.
  • Install the small white cable, with a black connector on one end per the picture. The black connector attaches to the Mosfet board.
  • Use a small screw driver to attach the raw end of the white cable to the control board. Ensure that all wire strands are in the terminals before tightening.

Step 5 - Optional

Install Heat Bed Power Cable

  • Install the red power conductor (positive) from the Mosfet board to the power supply. You may want to add a couple stickies and zip ties at this point to route your wires through.
  • Install the black power conductor (negative) from the Mosfet board to the power supply.
  • Be sure to tighten each screw.

Step 6

Install Control Board Power Cable

  • Locate the power cable with multiple conductors and larger white connector.
  • Install the white power connector onto the control board. Route the cable to the power supply.
  • Attach the red conductors to the positive terminals and the black conductors to the negative terminals.

Step 7

Route the Z-Axis Limit Switch Cable

  • Route the Z-Axis limit switch cable from the limit switch, pass the power supply and up to the connector on the control board.
  • On the control board, find the row of connectors just below the stepper drivers. The Z-axis limit switch should plug into the third from the left. Note that the connector is keyed and will only plug in one way.
  • If you added stickies and zip ties, as I did and shown in the previous images, be sure to route the Z-Axis limit switch cable through the zip tie loops.

Step 8

Install Z-Axis Stepper Cable

  • Find the bundles of stepper motors cables in the C Level Foam. You will need the shortest cable. Note that there is a different connector on each end of the cable.
  • Plug the proper connector into the Z-Axis stepper motor.
  • Plug the other end of the cable into the control board, the connector labeled Z Motor.

Underside Overview I