Converting Bambu Poop (failed prints / support waste) back into usable filament using a screw-based extruder.
The goal: a compact, desktop-friendly recycler that handles the entire process — shredding → extruding → spooling — all from one enclosure.

• 🧩 System Overview
• ⚡️ Power Distribution
• 🧵 RAMPS 1.4 Wiring Guide
• ⚙️ 12 V PSU → Component Wiring
• 🪛 Assembly Tips
• 🧯 Power Safety
• 🤖 3D Printing Guide
• 🧰 Assembly
  • 🔩 Extruder Assembly
  • ⚙️ Shredder Assembly
  • 🧱 Main Housing Assembly
  • 🎞️ Spooler Assembly
  • 🧩 Final Integration

✅ Tip: all grounds must be common (PSU GND ↔ RAMPS GND ↔ Buck GND ↔ Motor Controller GND ↔ ESP32 GND).

• Full assembly guide will me added SOON
• Keep heater + thermistor wires away from motor leads to avoid noise.
• Mount the buck converter near the ESP32; keep its output wires short.
• Label all 12 V lines before final crimping.
• Always test the heater MOSFET and fan MOSFETs with a multimeter before loading filament.
• Add a thermal fuse (250 °C) inline with the heater block for safety.

• Use a 12 V 20 A (240 W) PSU with built-in short-circuit protection.
• Add a 5 A inline fuse for the RAMPS input and 10 A fuse for the motor controller branch.
• Ensure metal enclosures are earth-grounded.
• Never leave the extruder unattended while heating.

• Extruder

  • extruder - chute.step (PLA or Resin)
  • extruder - pipe.step (PLA)
  • fan mount - Part 1.step (Resin)
  • extruder Copy 1 - Part 1.step (PLA or Resin)
  • extruder Copy 1 - Part 2.step (High Temp Resin)
  • extruder Copy 1 - Part 3.step (High Temp Resin)

• Spooler

  • main - Spur gear (170 teeth).step (PLA)
  • main - Spur gear (30 teeth).step (PLA)
  • spooler - Part 1.step (PLA)

• Shredder

  • spooler - Part 1.step (PLA, 4–5 wall loops recommended)

• Main (All PLA)

  • main - Motor.step
  • main - Part 1.step
  • main - Part 4.step
  • main - Part 6.step (1/4 of Part 1)
  • main - Part 7.step (2/4 of Part 1)
  • main - Part 8.step (3/4 of Part 1)
  • main - Part 9.step (4/4 of Part 1)
  • main - motor-holder.step (for spooler)

This section provides a step-by-step assembly guide for the entire Bambu Poop Recycler, broken down into key modules — Extruder, Spooler, Shredder, and Main Frame.
Each subsection includes detailed instructions, part references, and visuals to help you build, wire, and align every component of the system..

Before starting:

• Make sure all 3D-printed and mechanical parts are cleaned, deburred, and test-fitted.
• Keep thread locker, M3/M4 hardware, and a soldering iron or crimping tools nearby.
• Follow the wiring and safety guidelines in earlier sections before powering the system.

1. Attach the Stepper Motor and Planetary Gearbox
   Grab your NEMA stepper motor and planetary gearbox.
   Use four M3 screws to fasten them together as shown in the image below.

   
   Figure 1: Stepper motor and planetary gearbox mounted together.

2. Mount the 3D-Printed Plate
   Secure the 3D-printed plate to the planetary gearbox using M4 screws as shown below.

   
   Figure 2: 3D-printed plate mounted to the gearbox.

3. Install the Extension Rods
   Screw in four M3 threaded extension rods (each 57 mm long) into the plate.
   Make sure all rods are evenly tightened and parallel..

   
   Figure 3: Four M4 rods installed on the plate.

4. Attach the Chute and Resin Plates
   Slide the chute into the M3 extension holes and align it with the bottom side of the assembly.
   Then attach the two resin-printed plates using M3 screws.
   It’s recommended to print these two plates using a high-temperature material (e.g., ABS, ASA, or PA-CF).

   
   Figure 4: Chute inserted and resin plates secured.

5. Install Cooling and Vibration Components
   Hot glue the fans and vent channels onto the sides of the chute,
   and attach the vibration motor to one side as shown below.

   
   Figure 5: Fan and vibration motor placement.

6. Final Extruder Assembly Overview
   This is what the completed extruder assembly should look like::

   
   Figure 6: Final assembled extruder module.

🧠 Tips:

• Use thread locker (Loctite Blue) on all metal-to-metal threads.
• Ensure the gearbox output shaft rotates freely before connecting the screw.
• Keep fans oriented to blow across the chute for optimal cooling.
• Route wiring away from the heater and moving parts.

1. Prepare the Shredder Blade
   Cut a metal ruler to the correct length so it fits snugly inside the 3D-printed shredder housing.
   Make sure both ends are cleanly trimmed and free of burrs before assembly..

2. Install the Router Bit
   Insert the router bit into the side hole of the shredder assembly.
   Slide it in carefully until it seats fully, then tighten the drill chuck to secure it in place.

3. Attach the Motor Mount
   Use the shredder motor mount to align the drill motor with the printed housing.
   Do not glue or bolt it permanently yet — this will later slide into the main frame during final assembly.

4. Final Shredder Assembly Overview
   The completed shredder module should look similar to the image below..
   Ensure the ruler blade, router bit, and motor mount all align properly within the printed frame.

   
   Figure 4: Completed shredder assembly.

🧠 Tip:

• Double-check that the router bit spins freely without wobble before powering it.

1. Align the Printed Sections
   Gather all four 3D-printed housing parts.
   Lay them out in order — start with the top-left section, followed by the top-right, then move downward as shown in the reference image.
   Ensure the edges are clean and fit together tightly before gluing..

2. Bond the Housing Sections
   Apply super glue or CA glue along the connecting seams.
   Begin by gluing the top-left section, then move to the right side, and finally assemble the lower sections.
   Make sure each joint is aligned properly before the glue sets..

3. Final Main Housing Overview
   Once assembled, check that the full frame sits flat and square..
   The shredder and extruder modules will later slide into this housing frame during final assembly.

   
   Figure 3: Completed main housing ready for module installation.

🧠 Tips:

• Lightly sand the joint surfaces before gluing for stronger adhesion.
• Use clamps or tape to hold parts in place while the glue cures.

1. Insert the Spur Gear
   Take the large spur gear and insert it from the back side of the main housing.
   Make sure the gear teeth are facing inward and mesh smoothly with the drive gear inside the housing..
   Rotate it by hand to confirm it spins freely without binding..

2. Attach the Spooler Module
   Align the spooler part with the front opening of the housing.
   Gently press or clip it into place — it should hold firmly without glue.
   If you prefer a more permanent connection, you can add a small drop of super glue at each corner.

3. Check Alignment and Rotation
   Once installed, ensure the spooler gear and main gear rotate smoothly together..
   The spool should sit centered and spin freely without wobble..

   
   Figure 3: Completed spooler assembly mounted to the main housing.

🧠 Tip:

• If rotation feels stiff, lightly sand the inner gear edges or apply a drop of PTFE lubricant.

1. Insert the Shredder Assembly
   Slide the shredder assembly in from the back side of the main housing.
   Align it carefully with the top opening so that the chute and blade section fit into their designated slots.
   Make sure the motor mount sits flush and the assembly can move slightly for final alignment..

   
   Figure 1: Shredder assembly slid into position from the back.

2. Install the Extruder Assembly
   Next, slide the extruder assembly into the front section of the housing.
   The stepper motor should snap or slide into the mounting clip integrated into the frame.
   Double-check that the extruder chute aligns with the shredder output path for smooth material flow..

   
   Figure 2: Extruder assembly clipped into the front stepper mount.

3. Verify Module Alignment
   With both assemblies in place, check that:
   • The shredder outlet aligns directly above the ** hole**.
   • The wiring paths are clear and not pinched between parts.
   • The motor shafts rotate freely without resistance.

🧠 Tips:

• If fitment feels tight, lightly sand the mounting clips or interior guides.