Left Side

Assembling the left side of the machine

Now that the belt tensioner arms are assembled and attached, it’s time to start working on the frame. You’ll start by assembling the left side of the machine as seen from the front:

The machine shown from the front

Assembly

QtyPart
1FDM-0001 (Front Left Leg)
1FDM-0003 (Back Left Leg)
2Aluminum extrusions
6M5 T-slot nut
6M5x10 machine screw
1NEMA17 Stepper motor
1GT2 Pulley (with grub screws)
6M3x8 machine screw
1Limit switch PCB
2M5x25 machine screw
1FDM-0007 (Frame Umbilical Mount)
1FDM-0046 (Umbilical Swivel Part 1)
1FDM-0047 (Umbilical Swivel Part 2)
1M5x40 machine screw
  1. Take the Front Left Leg and insert the v-slot extrusions into the two square holes designed to take this part. Ensure that the extrusion comes to the end of the holes in which they’re inserted. If you have a hard time getting the extrusion into the slots, gently slide them into place using some taps from a mallet.

    Inserting the V-slot Extrusions into the Front Left Leg

  2. Take the Back Left Leg and place it onto two v-slot extrusions at the end opposite the Front Left Leg. Your progress should look like the image below.

    Inserting the V-slot Extrusions into the Back Left Leg
    Inserting the V-slot Extrusions into the Front Left Leg Result 2

  3. On the top rail, drop in and position a slot nut underneath the hole in the top of each leg and screw a M5x10mm machine screw into the nut.

    Securing the V-slot Extrusions to the top of the Front Left Leg
    Securing the V-slot Extrusions to the top of the Back Left Leg
    Top screws securing V-slot Extrusions

  4. On the bottom rail, the outer side has three exposed holes for machine screws (one on the Back Left Leg, two on the Front Left Leg). For each, drop in and position a slot nut under it and screw a M5x10mm machine screw into it.

    Securing the V-slot Extrusions to the Side of the Front Left Leg
    Securing the V-slot Extrusions to the Side of the Back Left Leg
    All three screw locations for securing the V-slot Extrusions to the Front Left Leg and the Back Left Leg

  5. On the bottom rail, the inner side has one exposed hole for a machine screw on the Back Left Leg. Drop in and position a slot nut under it and screw a M5x10mm machine screw into it.

    Securing the Bottom V-slot Extrusion to the top of the Back Left Leg
    Securing the Bottom V-slot Extrusion to the top of the Back Left Leg alternate view

  6. Slide the GT2 Pulley onto the the motor shaft of a NEMA17 stepper motor with the set screw side facing the motor body. Align the pulley so that the end is roughly flush with the end of motor shaft, then tighten one of the set screws on the pulley into the flat side of the motor shaft. Tighten the second set screw as well.

    Attaching the GT2 Timing Pulley to the NEMA17 stepper motor

  7. Mount the NEMA17 stepper motor to the Back Left Leg. Attach it using four M3x8mm screws, ensuring that the connector is facing inwards towards the zip tie loops as dictated in the picture.

    Mounting the Left Y-axis NEMA17 stepper motor to the Back Left Leg
    Orienting Left Y-axis NEMA17 stepper motor with the connector facing inwards

  8. Mount one of the three limit switches to the Front Left Leg as shown in the image. Use two M3x8mm screws and tap them directly into the print.

    Attaching the Y-axis limit switch

  9. Next, we’ll mount the Frame Umbilical Mount. Using two M5x25mm screws, attach it to the Front Left Leg as shown, threading directly into the part.

    Attaching the Frame Umbilical Mount to the Front Left Leg

  10. Lastly, we’ll assemble the umbilical swivel. Swivel Part 1 and Swivel Part 2 fit together as shown below, and are secured in place with a M5x40mm screw and an M5 nut. Tighten so there’s no play in the fit, but the two parts can swivel easily. This part helps keep the X gantry umbilical suspended over the build area. Set it aside for now.

Next steps

Continue to assembling the right side.