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Poop Conveyor - Configurable

3Core

Description Comments Tags

Description

Update 23-03-2026: Added a hand crank

You can now use the conveyor without a motor as a hand operated conveyor.

Conveyor: Parametric • Modular • Multiple Drive Options • Poop Conveyor option

This is the second generation of my modular conveyor system.
While the original modular conveyor was based on a servo drive with Wi-Fi servo control, this version is designed around simplicity, parametric customization, and modular expansion, without sacrificing compatibility with the original system.

The conveyor can be configured for different lengths, widths, and heights, and supports multiple drive options, including a new plug-and-play DC motor solution.

Key Features

Modular conveyor segments
Parametric length, width, and height
Multiple drive side options (servo, DC motor)
No glue required

Parametric Model & 3MF Workflow

The conveyor is generated using a parametric model.
Only the most essential parameters are exposed to keep the system robust, predictable, and easy to customize.

When you generate a customized conveyor, the result is a single assembled 3MF file.

When you load this 3MF file into your slicer, you will see the fully assembled conveyor, not loose parts.
From there, a few manual steps are required before printing.

Required Steps in the Slicer

Split to Objects
Split the assembled model into individual parts.
Layout the Components
Arrange the components on the build plates for your specific printer.
Use Multiple Build Plates
You will usually need multiple plates to fit all components.
You are free to print only the parts you need.
For example, if you don’t need the poop chute, you can simply skip those parts.
Assign Filaments per Component
You can select different filaments for different parts
(for example: frame, belt, shafts, or guides).

Default Print Profile

The provided default print profile is an example configuration and uses the following parameters:

Module length: 220 mm
Total width: 74 mm
Leg height: 20 mm

This profile mainly serves as:

A reference for how the components are laid out on the build plates
A known-good starting point for first-time prints

You are encouraged to customize the parameters and only print the modules and add-ons you actually need.

Adjustable Parameters

Module Length

Adjustable from 140 mm to 350 mm
This defines the length of one conveyor segment
Multiple segments can be connected using frame connectors

Total Width

Adjustable from 55 mm to 150 mm
This is the overall outer width of the conveyor
Net belt width = total width − 14 mm
- 2 × 6 mm side walls
- 2 × 1 mm clearance

Modular Conveyor System

Each conveyor consists of one or more modules:

Each module is a self-contained frame section
Modules are connected using connectors
The belt is extended by adding extra belt modules.
- Belt modules can be connected with a small piece of filament
Only the first and last modules require drive sprockets
Middle modules contain no drive components

Assembly Guide

Frame Side Variants The model has three different frame side types, depending on the function of the module. TT Motor Drive Side This is the recommended default drive option Designed for the MakerSupply / Bambu Lab TT motor Simple 5 V DC motor drive via USB connector The Bambu lab TT-motor slides directly into the printed frame. The motor compartment is closed with a printed cover, secured using: 4 × M2 self-tapping screws
Servo Drive Side (alternative drive, not needed when using the TT-motor) Frame side with servo mounting opening Designed for continuous-rotation servos Fully compatible with the setup from Modular Conveyor with ESP32 Servo Control Suitable for speed and direction control via software
Passive / Universal Frame Side Used as the opposite side of a driven module Also used for non-driven modules Designed symmetrically so it can be mounted left or right Used for hand operated conveyors with the Hand Crank (no motor) This makes the system orientation-independent and simplifies multi-module layouts
Drive Sprockets The belt loops around the drive sprockets. Carefully remove all support material from the drive sprocket. The sprocket has a hexagon opening for a shaft
The TT-motor shaft with corresponding hole, is used to connect the TT-motor to the sprocket
Hand crank
Servo mounting When using a servo motor, the servo horn can be mounted to the drive sprocket using a standard servo horn. The horn normally comes with your servo, as alternative you can find standard servo mounts on makerworld. If necessary, adjust the lenght of the servo horn to ensure proper fit with the sprocket
Passive (non-drive) sprockets The hexagon shaft without hole can be used on sides where no motor / drive system is present.
Belt Assembly Belt modules are connected using pieces of filament as hinge pins. Just cut pieces from your filament roll and insert them in the holes to connect the hinges.
The conveyor length can be extended by adding extra frames using connectors
When extending the conveyor lenght with extra modules, no sprockets are required at the connecting modules. Sprockets are only required at the start and end of the conveyor. On the middle parts of the conveyor, long (thicker) shafts can be used.
Belt guides are used to support the belt. There are 3 lengths of belt guides. Short Belt Guide Sprocket clearance on both ends Used for fully driven single modules
Medium Belt Guide Sprocket clearance on one end only Used when extending the conveyor with additional modules
Long Belt Guide No sprocket clearance on either end Used for middle modules in multi-segment conveyors
Frame Legs Frame legs are used to connect two sides Leg-heigth can be configured in the parameters of the parametric model maker
Assemble one frame side with the belt guide and the sprockets Place the lower belt shafts Mount the belt over the sprockets and over the lower guide shafts Lower guide shafts prevent belt sagging Attach the opposite frame side Connect the two frames together using the frame legs.
Top Guides Top guides form the upper edges of the frame alongside the belt. Available in two variants: Full module length Half module length Both are generated parametrically based on the selected module length.
Endcaps - Two endcaps are available closed endcap chute endcap
Poop Chute Module An optional poop chute module is available for 3D printer integration. Top opening for filament waste Side cutout automatically scales with belt height + leg height Designed to align correctly with: Bambu Lab P1S, P2S X1C, X2D H2S, H2D, H2C

More information

Information about adding a Servo drive to the conveyor, including the use of an ESP32 to control the servo drive can be found in the assembly guide of the original Modular Conveyor with ESP32 Wifi Servo Control. Here you can find the schematics and basic sample code to controll the servo speed and direction via a webserver over Wifi.

License:

Standard Digital File License