2-Axis Cantilever Gantry System

Technical Overview

The system utilizes a stacked 2-axis Cartesian kinematic arrangement:

1. Vertical Axis: A fixed base supporting a vertical rail that drives the carriage up and down.
2. Horizontal Axis: Mounted directly to the vertical carriage, allowing a cantilevered arm to extend and retract.

Both axes are driven via herringbone gear-and-rack channels to ensure smooth power transmission, minimal backlash, and self-centering alignment of the gear teeth.

Bill of Materials (BOM)

Electronics & Motion

• 2x NEMA 17 Stepper Motors (Standard size)

Fasteners & Hardware

• 4x 12mm V-Groove Bearings (For smooth linear rail tracking)
• 4x 4mm Screws (For securing the main structural base)
• Assorted 30mm long, 3mm Bolts and Nuts (For motor mounting, carriage assembly, and structural joints)
• **4x 10mm long , 3mm bolts for v-groove bearings

3D Printing & Slicing Specifications

To ensure maximum structural integrity and smooth gear engagement, follow these specific printing guidelines:

Critical Orientation: Rack Gears

• Orientation: Lay the rack gear directly on its angled side on the print bed.
• Reasoning: Orienting the rack on its side minimizes the need for support material within the herringbone teeth profile. This ensures clean tooth geometry, accurate pitch, and prevents tedious post-processing or rough gear movement.